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Huayi Qinzhou gas supply project was officially put into operation,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/huayi-qinzhou-gas-supply-project-was-officially-put-into-operation.jpg' alt=""projects participated by our company"" title=""projects participated by our company""></p>
<h1>Huayi Qinzhou gas supply project was officially put into operation</h1>
<p>Recently, Linde announced that its gas supply unit in Qinzhou, Guangxi was officially put into operation and began to supply oxygen and other industrial gases to the chemical new material integration base project of Shanghai Huayi Group in Qinzhou (hereinafter referred to as &quot;Huayi Qinzhou integration project&quot;). The site is a joint venture established by Linde and Huayi Group. It is also Linde's largest single project in China, with a total investment of nearly 1.3 billion yuan.</p>
<p>Huayi Qinzhou integration one belt, one road project, is located in the petrochemical industrial park of Qinzhou port economic and Technological Development Zone, Guangxi. With a total investment of about 70 billion yuan, it is the largest single investment project in Shanghai Huayi Group in the past 10 years. It is also a landmark coal chemical project in the process of &quot;one belt and one road&quot; construction. In order to ensure the gas supply of Huayi Qinzhou integration project, Linde has built and operated three sets of air separation units, which can supply 7500 tons of oxygen and 5000 tons of nitrogen to the site of Huayi Qinzhou integration project every day for the</p>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/huayi-qinzhou-gas-supply-project-was-officially-put-into-operation-1.jpg' alt=""projects participated by our company"" title=""projects participated by our company""></p>
<p>In addition to supplying gas to Guangxi Huayi energy and Chemical Co., Ltd., which operates the project, Linde has recently signed gas supply contracts with Guangxi Huayi new materials Co., Ltd. and Guangxi Huayi Chlor Alkali Chemical Co., Ltd., both of which belong to Shanghai Huayi Group. Since the two enterprises are also located in the petrochemical industrial park of Qinzhou Port Economic and Technological Development Zone, Linde will meet the industrial gas needs of the above enterprises through the cluster gas supply business model.</p>
<p>(projects participated by our company)</p>
",,9-5-2021 14:00:00,huayi-qinzhou-gas-supply-project-was-officially-put-into-operation,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/huayi-qinzhou-gas-supply-project-was-officially-put-into-operation.jpg,standard,open,open,,,
Our new product: The welded butterfly valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/our-new-product-the-welded-butterfly-valve.jpg' alt=""The welded butterfly valve"" title=""The welded butterfly valve""></p>
<p>Our technicians declare: The welded butterfly valve adopts a precise J-shaped elastic sealing ring and a triple eccentric multi-layer metal hard seal structure, which has good corrosion resistance and long service life. The triple eccentric welded butterfly valve has a two-way sealing function, and the product conforms to the national GB /T13927-92 Valve pressure test standard. It is widely used in metallurgical, electric power, petrochemical, water supply and drainage, and municipal construction and other industrial pipelines with a medium temperature of 425 ℃ or less to adjust the flow rate and carry out the use of the fluid.</p>
",,3-26-2021 13:00:00,our-new-product-the-welded-butterfly-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/our-new-product-the-welded-butterfly-valve.jpg,standard,open,open,,,
Three-stage segmented pneumatic flange bearing fluorine ball valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/three-stage-segmented-pneumatic-flange-bearing-fluorine-ball-valve.jpg' alt=""Three-stage segmented pneumatic flange bearing fluorine ball valve"" title=""Three-stage segmented pneumatic flange bearing fluorine ball valve""></p>
<p>The general use site is in the bulk system of petroleum and chemical products and the industry of desulfurization and degreasing</p>
<p>The pneumatic segmented ball valve affect the ball valve to open and close twice between 0° and 90°, and achieve the control of the flow in the pipeline. During the loading process in the storage area of the oil, the valve is fully opened to start loading. When the tanker is close to the set value, the valve is opened again to the 30° position to achieve slow opening and slow closing. It can also be set between 0-60° on-site to meet the on-site control of different flows.</p>
<p>Pneumatic segmented ball valve is composed of segmented three-position pneumatic actuator and ball valve. Among them, the three-position pneumatic actuator provides an operation mode of 0°-45°-90° or 0°-90°-180°, and the position is adjustable through the movement of two auxiliary pistons to generate mechanical brakes, such as 30 °, 50°, 75° and other positions. The installation of the pneumatic actuator on the valve needs to consider the operating torque of the valve and the safety factor recommended by the manufacturer. The structural principle of the ball valve determines that the operating torque of the valve is determined by the friction between the ball core and the valve seat, the valve stem and the packing. The maximum torque occurs when there is a pressure difference and the ball core rotates in the closed position to the opening direction. The three-stage ball valve can be used to achieve two opening and closing of the ball valve between 0° and 90° to achieve the flow rate in the pipeline. Controlled to reduce the impact on the equipment. Because the three-position pneumatic segmented ball valve can realize the ball valve to open and close twice between 0° and 90°, and control the flow in the pipeline, it is widely used in petroleum and chemical industries, desulfurization and gentrification industry system.</p>
",,3-26-2021 14:00:00,three-stage-segmented-pneumatic-flange-bearing-fluorine-ball-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/three-stage-segmented-pneumatic-flange-bearing-fluorine-ball-valve.jpg,standard,open,open,,,
Advantages and Disadvantages of Soft Seal Gate Valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/advantages-and-disadvantages-of-soft-seal-gate-valve.jpg' alt=""A Soft Seal Gate Valve from Agile"" title=""A Soft Seal Gate Valve from Agile""></p>
<h1>Advantages and Disadvantages of <a href='/product-category/ball-valve'>Soft Seal Gate Valve</a></h1>
<h2>Overview of Soft Seal Gate Valve:</h2>
<p>Soft seal gate valve is a kind of manual valve used to connect pipeline mediums and switches used in hydraulic engineering. The structure of the soft seal gate valve is composed of a valve seat, <strong><a href='/product-category/ball-valve'>valve cover</a>,</strong> gate, gland, stem, hand wheel, gasket and hexagon bolt. The inside and outside surfaces of the valve channel are sprayed with the process electrostatic powder. After baking in a high temperature furnace, the smoothness of the whole channel and the inner groove of the gate valve is ensured, and the appearance also gives a sense of color vision. <strong><a href='/product-category/ball-valve'>gate valve</a></strong> is made for water conservancy.</p>
<h2>Types and Applications of Soft Seal Gate Valves:</h2>
<p>As a common manual on-off valve in the pipelines, soft seal gate valves are mainly used in waterworks, sewage pipelines, municipal drainage engineering, fire pipeline engineering, as well as non-corrosive liquid and gas industrial pipelines. It can be customized according to the field usage such as rising stem soft seal gate valve, non-rising stem soft seal gate valve, extended stem soft seal gate valve, buried type soft seal gate valve, electric soft seal gate valve, <strong><a href='/products/zvf-pn16'>pneumatic soft seal gate valve</a></strong>, etc.</p>
<h2>What are the Advantages of Soft Seal Gate Valves</h2>
<ol>
<li>
<p>The advantage of the soft seal gate valves is first of all its cost. Generally, most of the soft-seal gate valve series use ductile iron QT450 as a whole. The cost of the valve body will be much cheaper than that of cast and stainless steel. Compared with the project batch procurement this is quite affordable and at the same time offers quality assurance.</p>
</li>
<li>
<p>Next, from the performance characteristics of the soft-sealed gate valve perspective, the gate plate of the soft-sealed gate valve is lined with elastic rubber and the inner part adopts a wedge structure. The top hand wheel mechanism is used to make the screw rod drop to drive the elastic ram to press down, which is sealed with the internal wedge groove. The elastic rubber gate can be stretched and squeezed, thus achieving a good sealing effect. Therefore, the sealing effect of the soft sealing gate valve in the case of water conservancy and some non-corrosive media is obvious.</p>
</li>
<li>
<p>Third, for the later maintenance of the <strong><a href='/product-category/ball-valve'>soft seal gate valve</a></strong>, the structure design of the soft seal gate valve is simple, clear, and easy to remove and install. When the valve is used for a longer period of time, the elastic gate in the gate valve will be opened and closed frequently and the rubber will lose its elasticity, resulting in lax closing and valve leakage. It is at this moment that the advantages of the structural design of the <strong><a href='/products/jb-200'>soft seal gate valves</a></strong> become obvious. The maintenance personnel can directly disassemble and replace the gate without dismantling the entire valve. This in turn saves time and effort by cutting the manpower and resources on site needed for maintenance.</p>
</li>
</ol>
<h2>What are the Disadvantages of Soft Seal Gate Valves</h2>
<ol>
<li>
<p>Speaking of the disadvantages of soft seal gate valves, let's take a look at it from an objective perspective. The core point of soft seal gate valves is that the soft-seal elastic gate can be extended and contracted and automatically filled. The sealing and air-tightness of the soft-seal gate valve is really good for non-corrosive gases and liquids.</p>
</li>
<li>
<p>Since nothing on this world is perfect, there are advantages and disadvantages. The obvious disadvantage of soft-sealed gate valves is that the elastic rubber gate cannot be used continuously at a temperature exceeding 80°C, with hard particles and under corrosiveness. In such cases it will cause elasticity which will further lead to rubber gate being deformed, damaged or corroded. At least, these will result in pipeline leakage. The <strong><a href='/products/jb-200'>soft seal gate valve</a></strong> is therefore only suitable for non-corrosive, non-particle, and non-wear media.</p>
</li>
</ol>
<h2>Conclusion</h2>
<p>As for the advantages and disadvantages of soft-seal gate valves, the main reason is that you must first understand the characteristics of the medium, temperature, pressure, and on-site use when selecting the type. Plus the advantages and disadvantages of the soft-seal gate valve described in the article for comprehensive evaluation, and further in-depth Model selection. This is how many details that are overlooked during the model selection can be avoided and the valve can be used without worries.</p>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/advantages-and-disadvantages-of-soft-seal-gate-valve-1.jpg' alt=""A Soft Seal Gate Valve from Agile"" title=""A Soft Seal Gate Valve from Agile""></p>
",,10-12-2021 18:11:35,advantages-and-disadvantages-of-soft-seal-gate-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/advantages-and-disadvantages-of-soft-seal-gate-valve.jpg,standard,open,open,,,
Application of Angle Seat Valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/application-of-angle-seat-valve.jpg' alt=""Our Angle Seat Valve"" title=""Our Angle Seat Valve""></p>
<h1>Application of <a href='/product-category/seat-valve'>Angle Seat Valve</a></h1>
<p>Application equipment: purified water machine / multi effect distilled water machine / biological fermentation / liquid preparation system / heat exchange system / online cleaning / online sterilization, etc.</p>
<p>Application Industry: pharmaceutical industry.</p>
<p>Application valves: angle seat valve / proportional control valve, etc.</p>
<p>Applicable medium: steam / water / medicine.</p>
<p>Valve selection: angle seat valve / proportional control valve.</p>
<p>Valve selection (angle seat valve): suitable for high frequency switch, alternating hot and cold conditions, high temperature resistance, fast reaction speed, accurate control and long service life. Proportional control valve: accurate position feedback, accurate flow regulation, independent research and development of valve + regulating cone and regulator, very high matching, perfect flow curve, can achieve linear output and equal percentage output.</p>
<p>Application equipment: beer barrel cleaning machine, beer barrel filling cleaning machine.</p>
<p>Application industry: beer equipment.</p>
<p>Application valves: angle seat valve, regulating valve, etc.</p>
<p>Angle seat valve advantages: accurate control, fast response, good stability, long life, beautiful appearance, can add manual limit, position indication, position feedback and other accessories.</p>
<p><strong><a href='/product-category/seat-valve'>Angle Seat valve</a></strong> product page for all our Angle Seat valves currently on offer. We manufacture and supply types JZ-PN16, JZF-PN16 and JZTS-PN16.</p>
<p>For more information about our products and our business, please visit our <strong><a href='/product-category/ball-valve'>Products page</a></strong> and our <strong><a href=""https://agilevalve.com/about-us/"">About Us</a></strong> page where you can find all the information on our other products such as high performance butterfly valves, safety valves, three-piece ball valves, carbon steel valves, flange ball valves, flanged swing check valves, one piece ball valves, stainless steel ball valves, stainless steel valves, multi way ball valves, and more.</p>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/application-of-angle-seat-valve-1.jpg' alt=""Our Angle Seat Valve"" title=""Our Angle Seat Valve""></p>
",,10-12-2021 18:11:35,application-of-angle-seat-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/application-of-angle-seat-valve.jpg,standard,open,open,,,
Agile started to use advanced XRF analysis technology,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/agile-started-to-use-advanced-XRF-analysis-technology.jpg' alt=""Agile started to use advanced XRF analysis technology"" title=""Agile started to use advanced XRF analysis technology""></p>
<p>In order to further enhance the raw material quality control, at the end of 2019, Agile started to use Thermo Scientific™ Niton™ XL2 handheld analyzer with advanced XRF analysis technology.<br>
XL2 handheld analyzer is a positive tool for material identification. Featuring a standard integrated camera for accurate positioning of the analysis area, the XL2 Analyzer provides immediate, nondestructive elemental analysis of alloy materials from titanium to nickel as well as tramp and trace element analysis. It is equipped with 400 kinds of intelligent combination of Alloy, close to the level of laboratory analysis, visual display specified alloy elements and their percentages.<br>
Besides that, handheld analyzer also give us:</p>
<ul>
<li>Immediate and quick</li>
<li>Light and portable</li>
<li>Non-destructive</li>
<li>Economic (excluding device purchasing)</li>
</ul>
<p>We believe this important tool will bring us a great improvement on raw material incoming control and better service to our customers.</p>
<ul>
<li>Control range including: body, ball, stem, body flanges, connections, bars and etc.</li>
<li>Mainly focus on kinds of metallic elements, including: C, Si, Mn, P, S, Cr, Ni, Mo and etc.</li>
<li>A complete material analysis will be provided based on quality standard or customer’s requirements.</li>
</ul>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/agile-started-to-use-advanced-XRF-analysis-technology-1.jpg' alt=""Agile started to use advanced XRF analysis technology"" title=""Agile started to use advanced XRF analysis technology""></p>
",,10-12-2021 18:11:35,agile-started-to-use-advanced-XRF-analysis-technology,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/agile-started-to-use-advanced-XRF-analysis-technology.jpg,standard,open,open,,,
Classification of the High Temperature Working Conditions of Valves,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/classification-of-the-high-temperature-working-conditions-of-valves.jpg' alt=""A worker is checking the condition of the valve"" title=""A worker is checking the condition of the valve""></p>
<h1>Classification of the High Temperature Working Conditions of <a href='/product-category/ball-valve'>Valves</a></h1>
<h2>High Temperature Conditions Mainly Include:</h2>
<p>Sub high temperature, high temperature grade I, high temperature grade II, high temperature grade III, high temperature grade IV, high temperature grade V.</p>
<h2>1. Sub High Temperature</h2>
<p>Sub high temperature refers to the valve’s working temperature of 325 ~ 425 ℃. If the medium is water/steam, WCB, WCC, A105, wc6 and wc9 are mainly used. If the medium is sour oil, C5, CF8, CF3, CF8M and cf3m with sulfide corrosion resistance are mainly used. They are mostly used in atmospheric and vacuum distillation units and delayed coking units in refineries. At this time, CF8, CF8M, CF3 and cf3m valves are not used for anti-acid solution corrosion, but for sulfur-containing oil products and oil and gas pipelines. Under this condition, the upper limit of the maximum working temperature of CF8, CF8M, CF3 and cf3m is 450 ℃.</p>
<h2>2. High Temperature Grade I</h2>
<p>When the working temperature of the <strong><a href='/product-category/other-valve'>valve</a></strong> is 425 ~ 550 ℃, it is designated as high temperature grade I (PI grade for short). The main material of PI class valve is &quot;high temperature grade I medium carbon chromium nickel rare earth titanium high quality heat resistant steel&quot; with CF8 as base shape in ASTM a351 standard. Because PI grade is a specific name, the concept of high temperature stainless steel (P) is included here. Therefore, if the working medium is water or steam, high temperature steel wc6 (t ≤ 540 ℃) or wc9 (t ≤ 570 ℃) can also be used, and high temperature steel C5 (zg1cr5mo) can also be used for sour oil. However, they cannot be called PI grade here.</p>
<h2>3. High Temperature Class II</h2>
<p>The working temperature of the valve is 550 ~ 650 ℃, which is defined as high temperature class II (P Class II for short). Class P Ⅱ high temperature valve is mainly used in heavy oil catalytic cracking unit of refinery. It includes high temperature lining wear-resistant gate valve used in three rotary nozzles and other parts. The main material of class P II valve is &quot;high temperature class II medium carbon chromium nickel rare earth titanium tantalum strengthened heat resistant steel&quot; with CF8 as base shape in ASTM a351 standard.</p>
<h2>4. High Temperature Class III</h2>
<p>The working temperature of the valve is 650 ~ 730 ℃, which is defined as high temperature class III (P Class III for short). The P Ⅲ high temperature valve is mainly used in the heavy oil catalytic cracking unit of refinery. The main body material of class P Ⅲ high temperature valve is &quot;high temperature class Ⅲ medium carbon chromium nickel molybdenum rare earth titanium tantalum strengthened heat resistant steel&quot; with CF8M as base shape in ASTM a351 standard.</p>
<h2>5. High Temperature Grade IV</h2>
<p>The working temperature of the valve is 730 ~ 816 ℃, which is defined as high temperature grade IV (P grade IV for short). The upper limit of working temperature for class P IV valve is set at 816 ℃ because the maximum temperature provided in the standard ASME b16134 pressure temperature class is 816 ℃ (1500 ℃) υ)。 In addition, when the working temperature exceeds 816 ℃, the steel is close to the forging temperature region. At this time, the metal is in the plastic deformation range, and the metal has good plasticity, so it is difficult to bear high working pressure and impact force without deformation. The main material of class P IV valve is CF8M in astma351 standard, which is base shape &quot;high temperature class IV medium carbon chromium nickel molybdenum rare earth titanium tantalum strengthened heat resistant steel&quot;. F310 (C content ≥ 01050%) and f310h in CK-20 and astma182 standards.</p>
<h2>6. High Temperature Grade V</h2>
<p>The working temperature of the valve is higher than 816 ℃, which is referenced as class P v. class P V high-temperature valve (used as cut-off valve, rather than regulating <strong><a href='/product-category/butterfly-valve'>butterfly valve</a></strong>). It must adopt special design means, such as heat insulation lining or water or gas cooling, so as to ensure the normal operation of the valve. Therefore, the upper limit of the working temperature of class P V high temperature valve is not specified, because the working temperature of the valve is controlled not only by materials, but by special design means, and the basic principle of the design means is the same. According to the working medium, working pressure and special design method, the reasonable material that can meet the requirements of the valve can be selected. In class P V high temperature valves, hk-30 and HK-40 superalloys in ASTM a297 standard are usually used as the inserts or butterfly plates of flue gate valves or butterfly valves. They can resist oxidation and corrosion in reducing gas below 1150 ℃, but they can't bear impact and high pressure load.</p>
",,10-12-2021 18:11:35,classification-of-the-high-temperature-working-conditions-of-valves,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/classification-of-the-high-temperature-working-conditions-of-valves.jpg,standard,open,open,,,
Common Check Valves,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/common-check-valves.jpg' alt=""A Check Value from Agile"" title=""A Check Valve from Agile""></p>
<h1>Common <a href='/product-category/check-valve'>Check Valves</a></h1>
<p>Lift check valve, also known as <strong><a href='/product-category/check-valve'>check valve</a></strong>, one-way valve, counter flow valve, and back pressure valve, refers to a valve that automatically opens and closes the valve disc depending on the flow of the medium itself to prevent the medium from flowing back. The check valve is a kind of an automatic valve. Its main function is to prevent the back flow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.</p>
<p><strong><a href='/product-category/check-valve'>Swing check valves</a></strong> are generally used on pipelines with large pipe diameters, a certain flow rate, and stable flow rate and pressure. Small-diameter forged steel check valves are generally equipped with a disc spring, while American standard large-diameter cast steel check valves are generally equipped with a pressure balance tube. The valve stem can prevent the flow of the medium in the normal direction when the medium needs to be cut off. When the medium pressure comes from the downstream, the valve stem can supplement the pressure of the pipeline to enhance the sealing performance of the valve seat backflow. The valve stem can be manually operated or driven by a driver.</p>
<p>The double clip check valve (or Wafer check valve) is mainly composed of <strong><a href='/product-category/ball-valve'>valve</a></strong> body, valve clack, valve stem, spring and other parts, which are connected by a wafer. Due to the short closing stroke of the disc and spring loading, the phenomenon of the water hammer can be significantly reduced. <strong><a href='/product-category/check-valve'>Wafer check valves</a></strong> are mainly used in the municipal, industrial and high-rise building water supply and drainage pipe network. Their installation is easy thanks to their structure length being shorter than general check valves.</p>
<p>Visit our <strong><a href='/product-category/ball-valve'>valve product pages</a></strong> for more information on our Check Valves. We currently offer a <strong><a href='/product-category/check-valve'>Flanged Swing Check Valve</a></strong> and 6 types of <strong><a href='/product-category/check-valve'>Water Type Check Valve</a></strong>. Besides check valves, we are also manufacturing and exporting ball valves, butterfly valves, globe valves, angle seat valves, safety valves, needle valves and other valves. Besides valves, we also produce <strong><a href='/product-category/quick-connector'>quick connectors</a></strong> and <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipes</a></strong>. As a high quality OEM valves manufacturer and supplier from China, with manufacturing facilities in Shanghai and Taiwan, we offer an excellent service and high quality valve product to clients from all over the world. Please do not hesitate to <strong><a href=""https://agilevalve.com/contact/"">get in touch</a></strong> with us at any time.</p>
",,10-12-2021 18:11:35,common-check-valves,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/common-check-valves.jpg,standard,open,open,,,
Do you know the technical requirements for welding process of ball valve body?,,"<h1>Do you know the technical requirements for welding process of <a href='/product-category/ball-valve'>ball valve</a> body?</h1>
<p>The technical challenges of the ball valve body manufacturing lie in the welding process. In this short article we will introduce the welding process of the <strong><a href='/product-category/ball-valve'>ball valve</a></strong> body.</p>
<h2>1. Technical Requirements of the Valve Body</h2>
<p>(1) The valve body has no deformation after seam welding, including the upper and lower shaft flanges (45 steel).</p>
<p>(2) The heated area of the valve body cannot be too wide and the temperature cannot be too high, otherwise the sealing device in the valve body will be damaged.</p>
<p>(3) There shall be no weld bead.</p>
<p>(4) Ensure that the pressure is above 10MPa.</p>
<h2>2. Weld Structure</h2>
<p>According to the above technical requirements, the weld is determined to be a non-penetration weld. Therefore, the butt joint form of the weld is required to ensure both assembly and non-penetration.</p>
<h2>3. Assembly</h2>
<p>The sealing test is carried out after positioning and fastening with bolts around the two parts. The design requirements are met between the outside of the ball and the valve body.</p>
<h2>4. Welding Process</h2>
<p>Considering the technical requirements of the valve body, MAG CO2 welding machine was selected.</p>
<p>ER50-6 is selected as welding material（ Ø 1.0) welding wire.</p>
<p>According to the principle of equal strength of the welding material, ER50-6 is selected（ Ø 0) the welding wire meets the requirements of zg15 Ⅱ.</p>
<p>The shielding gas is a mixture of 82%Ar+18%CO2.</p>
<h3>4.1 Tack Welding</h3>
<p>Due to the serious hardening tendency of cast steel and 45 steel, it is necessary to preheat them before the positioning welding. The oxygen acetylene flame is used to evenly heat both sides of the weld within the range of 2 times of the plate thickness to 75 ~ 100 ℃ (inclined to 45 steel side). And the far-infrared thermometer is used to measure, subject to not affecting the sealing device.</p>
<p>Before welding, the oxide scale and rust within 20 mm on both sides of the weld surface shall be polished to metallic luster by angle grinder.</p>
<p>Mark 6 positioning points 50mm from the edge on both sides of the weld and measure the distance between the two points with a caliper to measure the shrinkage.</p>
<h3>4.2 Back Cover Welding</h3>
<p>Considering the characteristics of zg15 Ⅱ material such as high rigidity and poor plasticity, small welding parameters, i.e. small welding heat input, should be adopted in the selection of welding specifications. On the premise of ensuring the weld quality, the welding speed should be increased as much as possible, the fusion ratio should be reduced, and the multi-layer, multi pass and six section symmetrical welding method should be adopted in the aspect of deformation; The welding sequence is shown in Fig. 2 and Fig. 3. Pay attention to measure the positioning point with caliper for each welding layer, and control the shrinkage until the welding is finished. In addition to the first and last pass, the other passes are treated by hammering.</p>
<h2>5. Conclusion</h2>
<p>After the welding is completed, there is no leakage through the pressure test (air tightness) of the weld joint. The X-ray inspection should show the weld having no welding defects such as porosity, slag inclusion, lack of fusion and cracks, and the valve core rotation should meet the technical requirements.</p>
<p>Agile Valves is an OEM Valves Manufacturer from China</p>
<p><strong><a href='/product-category/ball-valve'>Ball valve</a></strong> product page for all our ball valves currently on offer.</p>
<p>For more information about our products and our business in general, please visit our <strong><a href='/product-category/ball-valve'>Products page</a></strong> and our <strong><a href=""https://agilevalve.com/about-us/"">About Us page</a></strong> where you can find all the information on our other products such as high performance butterfly valves, safety valves, three-piece ball valves, carbon steel valves, flange ball valves, flanged swing check valves, one piece ball valves, stainless steel ball valves, stainless steel valves, multi way ball valves, and more.</p>
",,10-12-2021 18:11:35,do-you-know-the-technical-requirements-for-welding-process-of-ball-valve-body,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/do-you-know-the-technical-requirements-for-welding-process-of-ball-valve-body.jpg,standard,open,open,,,
From Stainless Steel Ball Valves to Three-piece Ball Valves,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/from-stainless-steel-ball-valves-to-three-piece-ball-valves.jpg' alt=""A Valve from Agile"" title=""A Valve from Agile""></p>
<h1>From <a href='/product-category/ball-valve'>Stainless Steel Ball Valves</a> to <a href='/product-category/ball-valve'> Three-piece Ball Valves </a></h1>
<h2>1. Ball Valve Structure</h2>
<p>A <strong><a href='/product-category/ball-valve'> ball valve </a></strong> evolved from the plug valve. Its opening and closing parts are used as a sphere and the ball is turned 90 degrees around the axis of the stem to achieve the opening and closing effects.</p>
<h2>2. Ball Valve Functions and Applications</h2>
<p>Ball valves are mainly used in pipelines to cut off, distribute and change the flow direction of a medium. The valve with the designed V-shaped opening also enables a good flow regulation function.</p>
<p>Ball valve is not only simple in structure and good in sealing performance, but also performs well in a certain nominal range of small volume, light weight, less material consumption, small installation size, and small driving torque. On top of that, it is easy to operate, easy to achieve rapid opening and closing, and is one of the fastest developing valve varieties on the valve market in recent years. <strong><a href='/product-category/ball-valve'> Ball valves </a></strong> are widely used especially in the developed countries such as USA, Britain, Japan, Germany, France, and Italy. There, the varieties and quantity of ball valves being used are still expanding. They continue to evolve to cope even better with high temperatures, high pressure, contain large port, high sealing, long life, and excellent regulating performance. Their reliability and other performance indicators have reached a high level and have partially replaced gate valves, stop valves and regulating valves.</p>
<p>With the development of the ball valve technology, it will be widely used in the foreseeable short time future. Especially in the oil and gas pipelines, refining and cracking units, and nuclear industry. In addition, ball valves will also become one of the leading valve types in large and medium-sized calibers and low- and medium-pressure fields in other industries.</p>
<h2>3. Advantages of the Ball Valve Technology</h2>
<ol>
<li>
<p>Ball valves have the lowest flow resistance (actually zero).</p>
</li>
<li>
<p>Ball valves can be reliably applied to corrosive media and low boiling point liquids because they will not get stuck during operations (when/if there is no lubricant).</p>
</li>
<li>
<p>Complete sealing can be achieved within a relatively large pressure and temperature range.</p>
</li>
<li>
<p><strong><a href='/product-category/ball-valve'> Ball valves </a></strong> can realize fast opening and closing functions. The opening and closing time of some structures is only 0.05~0.1s to ensure that it can be used in the automation system of the test bench. There is no shock during the operation when opening and closing the valve quickly.</p>
</li>
<li>
<p>The ball-shaped closing piece can be automatically positioned in position.</p>
</li>
<li>
<p>The working medium is reliably sealed on both sides.</p>
</li>
<li>
<p>When fully open and fully closed, the sealing surface of the ball and the valve seat is isolated from the medium. So the medium passing through the valve at high speed will not cause erosion of the sealing surface.</p>
</li>
<li>
<p>With compact structure and light weight, the ball valve technology can be considered as the most reasonable valve structure for cryogenic media systems.</p>
</li>
<li>
<p>The valve body is symmetrical, especially when the valve body structure is welded, which can well withstand the stress from the pipeline.</p>
</li>
<li>
<p>The closing piece can withstand the high pressure difference when closing.</p>
</li>
<li>
<p>The ball valve with a fully welded body can be directly buried in the ground, so that the internal parts of the valve are not corroded and the maximum service life can be up to 30 years. It is the most ideal valve for oil and natural gas pipelines.</p>
</li>
</ol>
<h2>4. Ball Valve Tightness</h2>
<p>The most important seat sealing ring material for ball valves is polytetrafluoroethylene (PTFE), which is inert to almost all chemical substances and has a small friction coefficient, stable performance, excellent time durability, wide temperature application range and excellent tightness performance. However, the physical properties of PTFE, including high expansion coefficient, sensitivity to cold flow and poor thermal conductivity, require the design of valve seat seals to focus on these characteristics. The plastic material of the valve seat seal also includes filled PTFE, nylon and many other materials. However, when the sealing material becomes hard, the reliability of the seal will be damaged, especially in the case of low pressure difference. In addition, synthetic rubber such as butyl rubber can also be used as a valve seat sealing material, but its applicable medium and temperature range drugs are limited. In addition, if the medium is not lubricated, the use of synthetic rubber is likely to jam the ball.</p>
<p>In order to meet the use requirements of industrial applications such as high temperature, high pressure, strong erosion, long life, etc., metal-sealed <strong><a href='/product-category/ball-valve'> ball valves </a></strong> have been greatly developed in the past ten years. The structure of the ball valve has been continuously improved, with the emergence of full-welded body direct-buried ball valves, lifting ball valves, making ball valves more and more widely used in industrial fields such as long-distance pipelines, oil refining equipment, and large-diameter (3050mm), high-pressure (70MPa), wide temperature range (-196~815℃) ball valve, so that the technology of the ball valve reaches a whole new level.</p>
<p><strong><a href='/product-category/ball-valve'>ball valve</a></strong>, <strong><a href='/product-category/ball-valve'>multi way ball valve</a></strong>, <strong><a href='/product-category/ball-valve'>one-piece ball valve</a></strong>, <strong><a href='/product-category/ball-valve'>two-piece ball valve</a></strong>, <strong><a href='/product-category/ball-valve'>three-piece ball valve</a></strong>, or <strong>[V flow control ball valve](<a href='/product-category/ball-valve'>https://agilevalve.com/products/ball-valve/v-flow-control-ball-valve/page/1/</a> /)</strong>, we are here to provide you with our best selection of valves.</p>
<p>Besides several types of stainless steel ball valves, our manufacturing facilities in Shanghai and Taiwan also produce and export high quality and <strong><a href='/product-category/butterfly-valve'>high-performance</a></strong> butterfly valves, safety valves, carbon steel valves, flanged swing check valves and a variety of other OEM valves on demand. Please visit our website and our <strong><a href='/product-category/ball-valve'>valve product page</a></strong> for more information on our valves, Shanghai valve factory and Taiwan valve factory.</p>
",,10-12-2021 18:11:35,from-stainless-steel-ball-valves-to-three-piece-ball-valves,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/from-stainless-steel-ball-valves-to-three-piece-ball-valves.jpg,standard,open,open,,,
Our new product: Fully Lined Ceramic Ball Valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/our-new-product-fully-lined-ceramic-ball-valve.jpg' alt=""Fully Lined Ceramic Ball Valve"" title=""Fully Lined Ceramic Ball Valve""></p>
<p>User location: Italy<br>
Delivery date: October 2018<br>
Installation date: March 2019<br>
Valve diameter: DN50<br>
Pressure Level: PN16<br>
Drive mode: single-acting pneumatic<br>
Medium type: concentrated ammonia water + copper powder<br>
Temperature: 280℃<br>
Pressure: 1Mpa</p>
<p>As we know, ammonia water is strongly corrosive, and the 1Mpa copper powder slurry has strong erosion and wear to the valve. In addition, when the temperature is up to 280℃, it becomes an extreme test for the sealing performance of the valve. Our customer from Italy had been troubled by its short operation life and easy leakage of valves in this working condition for a long time. Under such high temperature and scouring conditions, ordinary soft-sealed valves are obviously not a good option; but even metal hard-sealed valves have same issues under the high-speed scouring and wear of copper powder.<br>
Before replacing our ceramic ball valve, the customer used the metal hard-sealed ball valve from Perrin, Japan. The using time is basically less than six months. The valve is prone to leakage of the sealing surface, and needs to be replaced and repaired frequently, which increases the customer's cost.</p>
<p>In response to the problems that customers encounter when using valves, we provided with a set of professional ceramic lining and ceramic sealing ball valve. The valve was installed and put into use in March 2019, up to now, the using time has been more than one year, and the valve is working completely normally. It is expected to be used as long as three years, which not only saves the customer’s valve purchasing costs, also save costs for maintenance and replacement.</p>
",,10-12-2021 18:11:35,our-new-product-fully-lined-ceramic-ball-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/our-new-product-fully-lined-ceramic-ball-valve.jpg,standard,open,open,,,
Introduction and Characteristics of Quick Coupling,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/introduction-and-characteristics-of-quick-coupling.jpg' alt=""Agile Quick Connector"" title=""Agile Quick Connector""></p>
<h1>Introduction and Characteristics of <a href='/product-category/ball-valve'>Quick Coupling</a></h1>
<p>Quick joint is a joint that can realize pipeline connection or disconnection without tools. The quick couplings produced by Jiedi Company can be divided into the following: quick couplings for air, quick couplings for oxygen, fuel, gas, quick couplings for gas and liquid, and quick couplings for oil pressure.</p>
<h2>Application features:</h2>
<ol>
<li>
<p>Time-saving and labor-saving: when disconnecting and connecting the oil circuit through the <a href='/product-category/quick-connector'>quick coupling</a> the action is simple. This is saving time and manpower.</p>
</li>
<li>
<p>Medium-saving: when the oil circuit is broken, the one-way valve on the quick coupling can close the oil circuit so that the oil will not flow out and avoid the loss of oil and oil pressure.</p>
</li>
<li>
<p>Environmental protection: when the <a href='/product-category/quick-connector'>quick connector</a> is broken while connected, the medium will not leak. The quick coupling is design to prevent leakages under such situations and is therefore very suitable for contributing to protection of the environment from spills.</p>
</li>
<li>
<p>Equipment into parts, convenient transportation: large equipment or hydraulic tools that need to be easy to carry, use the quick connector to separate and transport, and then assemble and use after reaching the destination.</p>
</li>
</ol>
<p>The equipment is divided into parts for easy transportation. This includes the easy transportation of large equipment or hydraulic tools that need to be easily carried from place to place. The solution uses quick connectors to disassemble for the transportation purposes and then assemble for usage after reaching the destination.</p>
<p>Agile Valves Co., Ltd. is an OEM valves manufacturer and supplier from China. Our business scope covers most types of the automation process. Our manufacturing facilities at the Shanghai valve factory and Taiwan valve Factory are producing valve products that cover a wide range of quick connectors (couplings). Please see our <a href='/product-category/quick-connector'>quick connector product page</a> for all our quick connectors currently on offer. We manufacture and supply Type A, B, C, D, E, F, as well as <a href='/products/type-dc/"">Type DC</a> and <a href=""https://agilevalve.com/products/quick-connector/type-dp'>Type DP</a>.</p>
<p>For more information about our products and our business, please visit our <a href='/products/type-dp/"">Products page</a> and our <a href=""https://agilevalve.com/about-us'>About Us page</a> where you can find all the information on our other products such as high performance butterfly valves, safety valves, three-piece ball valves, carbon steel valves, flange ball valves, flanged swing check valves, one piece ball valves, stainless steel ball valves, stainless steel valves, multi way ball valves, and more.</p>
",,10-12-2021 18:11:35,introduction-and-characteristics-of-quick-coupling,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/introduction-and-characteristics-of-quick-coupling.jpg,standard,open,open,,,
The origins of Ball Valves,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/the-origins-of-ball-valves.jpg' alt=""A Ball Valve from Agile"" title=""A Ball Valve from Agile""></p>
<h1>The origins of Ball Valves</h1>
<p><strong><a href='/product-category/ball-valve'>Ball valve</a></strong> (ball valve) was invented in the 1950s. With the rapid development of science and technology the production technology and product structures have been improved continuously since then. <strong><a href=""https://agilevalve.com/about-us/"">In a short period of 40 years ball valve</a></strong> has rapidly developed into a major valve. In the developed countries the demand for ball valves is increasing year by year.</p>
<p>In China, ball valve is widely used in petroleum refining, long-distance pipeline, chemical industry, paper making, pharmaceutical, water conservancy, power, municipal, steel and other industries. It plays an important role for the national economy. It has the action of 90 degrees rotation, the plug body is a sphere, and has a circular through hole or channel through its axis.</p>
<p>Ball valve is mainly used in pipelines to cut off, distribute and change the flow direction of medium. It can be closed tightly only through a 90 degree rotation and small rotating torque. Ball valve is the most suitable for <strong><a href='/product-category/ball-valve'>switch and shut-off valve, V-type ball valve</a></strong>. Besides the pipe parameters, the electric valve should pay special attention to the environmental conditions. Because the <strong><a href='/product-category/ball-valve'>electric device</a></strong> in the electric valve is considered to be electromechanical equipment, its use state is greatly affected by its use environment. In general, special attention shall be paid to the use of <strong><a href='/product-category/ball-valve'>electric ball valve</a></strong> and <strong><a href='/product-category/ball-valve'>butterfly valve</a></strong> in the following environment.</p>
<h2>Characteristics:</h2>
<p>1、 Wear resistant; because the valve core of <strong><a href='/product-category/ball-valve'>the hard seal ball valve</a></strong> is alloy steel spray welding, and the sealing ring is alloy steel surfacing, the hard seal ball valve will not produce too much wear when it is opened and closed（its hardness coefficient is 65-70)</p>
<p>2、 Good sealing performance; since the seal of the hard seal ball valve is manually grounded, it can only be used until the valve core and seal ring are completely consistent. Its sealing performance is therefore very reliable.</p>
<p>3、 Light switch; the bottom of the seal ring of the hard seal ball valve is tightly held with the valve core by a spring. This makes the switch very light when the external force exceeds the preload of the spring.</p>
<p>4、 Long service life: it has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other departments, as well as people's daily lives.</p>
",,10-12-2021 18:11:35,the-origins-of-ball-valves,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/the-origins-of-ball-valves.jpg,standard,open,open,,,
Safety Valves - Basic Knowledge,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/safety-valves-basic-knowledge.jpg' alt=""A value from agile"" title=""A value from agile""></p>
<h1><a href='/product-category/needle-valve'>Safety Valves</a> - Basic Knowledge</h1>
<h2>1、 Overview of the Safety Valve</h2>
<p>The safety valve is normally closed under the action of external force on the opening and closing parts. When the medium pressure in the equipment or pipeline rises above the specified value, the medium is discharged to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value.</p>
<p>Safety valves belong to the category of automatic valves, which are mainly used in boilers, pressure vessels and pipelines. The control pressure does not exceed the specified value and it plays an important role in protecting the personal safety and equipment. The safety valve must be pressure tested before it can be used.</p>
<p>With the rapid development of China’s economic construction, there are more and more equipment projects with pressure control. In view of the need for equipment to reieve pressure, <strong><a href='/product-category/needle-valve'>safety valves</a></strong> play a vital role in protecting the equipment. As of 2013, there have been more than 700 various safety valve manufacturers and traders, with more than 200 daily transaction inquiries, and the supply and demand market for safety valves has obviously heated up.</p>
<p>Safety valves are mainly used in: steam boilers, liquefied petroleum gas tank cars or liquefied petroleum gas railway tank cars, oil production wells, high-pressure bypasses of steam power generation equipment, pressure pipes, pressure vessels, etc.</p>
<h2>2、 Types of <a href='/product-category/needle-valve'>Safety Valves</a></h2>
<p>The diameter of the safety valve is generally not large. The commonly used ones are between DN15mm-DN80mm, and those over 150mm are generally called large-diameter safety valves.</p>
<p>Safety valves are divided into full swing safety valves and macro opening <strong><a href='/product-category/needle-valve'>safety valves</a></strong>. According to the overall structure and loading mode of the safety valve, it can be divided into four types: deadweight, lever, spring and pilot. According to the connection with the pipeline, it can be divided into threaded safety valve and flange safety valve.</p>
<p>Agile Valves Co., Ltd. is one of the most successful and high quality OEM valves manufacturers in China. Our excellent valve manufacturing facilities located at our Shanghai valve factory and Taiwan valve factory are manufacturing and exporting valves of all types all around the world. Our <strong><a href='/product-category/needle-valve'>safety valve selection</a></strong> ranges from <strong><a href='/product-category/safety-valve'>copper safety valves</a></strong> to <strong><a href='/product-category/safety-valve'>stainless steel safety valves</a></strong>. Besides, these are complemented with our production line of high quality <strong><a href='/product-category/needle-valve'>needle valves</a></strong>.</p>
<p>Besides the high quality safety valves, our manufacturing facilities in Shanghai and Taiwan also produce and export high quality and high-performance butterfly valves, carbon steel valves, several types of stainless steel ball valves, flanged swing check valves and a variety of other OEM valves on demand. Please visit <strong><a href='/product-category/ball-valve'>valve product page</a></strong> for more information on our valves, Shanghai valve factory and Taiwan valve factory.</p>
",,10-12-2021 18:11:35,safety-valves-basic-knowledge,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/safety-valves-basic-knowledge.jpg,standard,open,open,,,
Selection and Application of the Butterfly Valve,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/selection-and-application-of-the-butterfly-valve.jpg' alt=""A Butterfly Valve from Agile"" title=""A Butterfly Valve from Agile""></p>
<h1>Selection and Application of the <a href='/product-category/butterfly-valve'>Butterfly Valve</a></h1>
<p><strong><a href='/product-category/butterfly-valve'>Butterfly valve</a></strong> is a simple regulating valve that can also be used for the purpose of switch control of low-pressure pipelines and mediums. Butterfly valve is a <strong><a href='/product-category/other-valve'>valve</a></strong> with a disc shaped closure part (valve plate) which can open and close around the valve shaft. It mainly plays the role of cutting off and throttling on the pipeline. Butterfly valve opening and closing part is a disc shaped butterfly plate that rotates around its axis in the valve body to achieve the opening, closing or adjusting functions of the <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipe</a></strong>. Butterfly valve is suitable for the pipeline conveying various corrosive and non-corrosive fluid mediums in the generator, gas, natural gas, liquefied petroleum gas, urban gas, cold and hot air, chemical smelting and power generation environmental protection system. It is used to regulate and cut off the flow of the medium.</p>
<h2>Butterfly Valves Application</h2>
<p>Butterfly valve is suitable for the flow regulation activities. Since the pressure loss of the butterfly valve in a pipeline is relatively large, it is about three times of a gate valve. Therefore, when selecting a butterfly valve the influence of pressure loss on the pipeline system should be fully considered. The valve plate should also be considered when performing the closing activities to bear the pipeline medium pressure. In addition, the limit of the operating temperature of the elastic seat material at high temperatures must be considered as well.</p>
<p>The structure length and overall height of the <strong><a href='/product-category/butterfly-valve'>butterfly valves</a></strong> are small. The opening and closing speed is fast and it has good fluid control characteristics. The structure principle of the butterfly valve is most suitable for making a large caliber valve. When the butterfly valve is required to be used for controlling a flow, it is important to select the correct size and type of a butterfly valve to achieve proper work and efficiency.</p>
<p>Generally, in the throttling, regulating control and mud medium aspects, the structure length is short and the opening and closing speed is fast. Therefore, <a href='/products/hand-lever-butterfly-valve/620d7a1x-10s16'>a low pressure cut-off butterfly valve</a> is recommended.</p>
<p>A butterfly valve can be selected for the task at hand in case of a double position adjustment, the channel of the shrinkage port, low noise, cavitation and gasification, a small amount of leakage to the atmosphere and abrasive medium.</p>
<p>When using a butterfly valve under special conditions such as throttling regulation, strict sealing or severe wear, low temperature (deep cooling) and other working conditions, special butterfly valve with special design metal seal belt regulating device shall be used.</p>
<p>The central butterfly valve is suitable for fresh water, sewage, sea water, salt water, steam, natural gas, food, medicine, oil, acid and alkali and other pipelines with the requirements of full sealing, zero gas test leakage, high service life and operating temperature of -10-150 ℃.</p>
<p>The soft seal eccentric butterfly valve is suitable for the two-way opening and closing of the ventilation and dust removal pipeline. It is widely used in the gas pipeline and water channel of metallurgy, light industry, power and petrochemical system.</p>
<p>Metal to metal double eccentric butterfly valve is suitable for urban heating, steam supply, water supply and gas, oil, acid and alkali pipelines as regulating and intercepting devices.</p>
<p>Metal to metal sealing three eccentric butterfly valve is not only a program control valve for PSA gas separation device, but also widely used in petroleum, petrochemical, chemical, metallurgy, power and other fields and is a good substitute for the gate valve and stop valve.</p>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/selection-and-application-of-the-butterfly-valve-1.jpg' alt=""A Butterfly Valve from Agile"" title=""A Butterfly Valve from Agile""></p>
<h2>Selection Principle of a Butterfly Valve</h2>
<ol>
<li>
<p>Because butterfly valves are relatively large compared to gate valves, they are suitable for pipeline systems with less pressure loss requirements.</p>
</li>
<li>
<p>Since butterfly valves can be adjusted by flow, they are suitable for selection in the pipeline requiring flow regulation.</p>
</li>
<li>
<p>Due to the limitation of butterfly valves’ structure and sealing material, they are not suitable for high temperature and high pressure pipeline system. The general working temperature is below 300 ℃ and the nominal pressure is below PN40.</p>
</li>
<li>
<p>The butterfly valve has a short structure length and can be made of large diameter. It is therefore advisable to select a butterfly valve for the case of short structure length or large diameter valve (such as over DN1000).</p>
</li>
<li>
<p>The butterfly valve rotates at 90 ° and can therefore be opened or closed and is suitable for the field with fast opening and closing requirements.</p>
</li>
</ol>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/selection-and-application-of-the-butterfly-valve-2.jpg' alt=""A Butterfly Valve from Agile"" title=""A Butterfly Valve from Agile""></p>
",,10-12-2021 18:11:35,selection-and-application-of-the-butterfly-valve,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/selection-and-application-of-the-butterfly-valve.jpg,standard,open,open,,,
Stainless Steel Elbow - the Installation Method,,"<style>
p img {
  width: 100%;
}
</style>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/stainless-steel-elbow-the-installation-method.jpg' alt=""A Elbow from Agile"" title=""A Elbow from Agile""></p>
<h1>Stainless Steel Elbow - the Installation Method</h1>
<p><strong><a href=""https://agilevalve.com/products/pipes/page/1/"">Stainless steel elbow</a></strong> plays an important role in many applications. It has a supporting and connecting role while its material can meet the needs of most users. Elbow materials are cast iron, stainless steel, carbon steel, non-ferrous metals and plastics. <strong><a href=""https://agilevalve.com"">Agile Valve</a></strong> mainly produces stainless steel elbows.</p>
<p>The chemical composition of the stainless steel elbow will keep the elbow’s surface from rusting and corroding for a long time. As part of the pipeline system, elbow is a pipe fitting that changes the direction of the pipeline. There are three kinds of most commonly used angles when it comes to an elbow. These are 45°, 90° and 180° angles. Other angles such as 60° and other unusual elbow angles can also be used in accordance with the engineering needs.</p>
<h2><a href=""https://agilevalve.com/products/pipes/page/1/"">Installation method of stainless steel elbow</a></h2>
<ol>
<li>
<p>The bolts of the stainless steel elbow valve packing gland need to be tightened evenly and cannot be pressed into a skewed state in order to prevent damage to the valve stem from obstructing and leaking.</p>
</li>
<li>
<p>When using a stainless steel elbow, be sure to keep it clean and the rotating thread must be regularly lubricated. If a fault is found, it needs to be stopped immediately and put into use after the cause is found out and the fault is cleared.</p>
</li>
<li>
<p>When installing, you can install the stainless steel elbow directly on the pipeline according to the connection method, and install it according to the location of use. Under normal circumstances, it can be installed on any position of the pipeline, but due to the need to facilitate the inspection operation, note that the flow direction of the stainless steel elbow is six upwards from the bottom of the valve disc. So the stainless steel elbow can only be installed horizontally.</p>
</li>
<li>
<p>When installing the stainless steel elbow, pay attention to its sealing performance to prevent leakage, which will affect the normal operation of the pipeline.</p>
</li>
</ol>
",,10-12-2021 18:11:35,stainless-steel-elbow-the-installation-method,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/stainless-steel-elbow-the-installation-method.jpg,standard,open,open,,,
Valve Types and Applications–I,,"<h1>Valve Types and Applications–I</h1>
<h2><a href='/product-category/ball-valve'>Ball Valve</a></h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-i.jpg' alt=""A Ball Valve from Agile"" title=""A Ball Valve from Agile""></p>
<p>A <strong><a href='/product-category/ball-valve'>ball valve</a></strong> is a quarter-turn valve with a port ball that can be rotated in the pipe to prevent or allow fluid flow. The special design can achieve a certain degree of flow regulation. The main specifications include the number of ports, port configuration, port connections, valve size, and the materials that make up the body, <strong><a href=""https://agilevalve.com/news/safety-valves-basic-knowledge/"">valve</a></strong> seat, seal and stem packing.</p>
<p>From compressed air pipelines to high-pressure hydraulic system, ball valves are used at any place where fluid flow must be cut off. Ball valves can provide low head loss characteristics because the ports can accurately match the pipe diameter. The sealing performance of the ball valve is better than that of the <strong><a href='/product-category/butterfly-valve'>butterfly valve</a></strong>, but the purchase and maintenance cost is higher. Usually, ball valves are driven by a lever that provides a visual indication of the valve status.</p>
<h2><a href='/product-category/butterfly-valve'>Butterfly Valve</a></h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-i-1.png' alt=""A Butterfly Valve from Agile"" title=""A Butterfly Valve from Agile""></p>
<p>The <strong><a href='/product-category/butterfly-valve'>butterfly valve</a></strong> is a quarter-turn valve with a centrally mounted circular disc that can be screwed in or out of the water flow. The main specifications include port connection, valve size and materials that make up the valve body, valve seat, seal, <strong><a href='/product-category/ball-valve'>ball valves</a></strong> of the same capacity, and are difficult to operate under high pressure and flow. They are also more prone to <strong><a href=""https://agilevalve.com/news/what-to-do-when-a-valve-in-use-leaks-what-are-the-main-reasons-for-leakage/"">leaks</a></strong> than ball valves and have higher head losses.</p>
",,10-12-2021 18:11:35,valve-types-and-applications-i,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-i.jpg,standard,open,open,,,
Twenty five taboos for valve installation-II,,"<h1>Twenty five taboos for valve installation-II</h1>
<p>Valves are the most common equipment in chemical enterprises. It seems easy to install valves, but if they are not implemented in accordance with relevant technologies, safety accidents will be caused. Today, I would like to share some experience and knowledge about valve installation.</p>
<h2>Valve Installation Taboo 3</h2>
<p>Sewage, rainwater, and condensate pipes are concealed without closing the water test.</p>
<p><strong>Consequences</strong>: it may cause water leakage and loss of usage.</p>
<p><strong>Measures</strong>: The closed-water test shall be checked and accepted in strict accordance with the specifications. Sewage, rainwater, condensate pipes, etc. buried underground, installed in ceilings, <strong><a href=""https://agilevalve.com/products/pipes/page/1"">pipe</a></strong> rooms, etc. must be ensured not to leak.</p>
<h2>Valve Installation Taboo 4</h2>
<p>During the hydraulic strength test and tightness test of the pipeline system, only the pressure value and water level change are observed. And the leakage inspection is not sufficient enough.</p>
<p><strong>Consequences</strong>: leakage occurs after the <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipeline</a></strong> system is in operation, affecting the normal use.</p>
<p><strong>Measures</strong>: when the piping system is tested in accordance with the design requirements and construction specifications, in addition to recording the pressure value or water level change within the specified time, it is particularly necessary to carefully check whether there is a leakage problem.</p>
",,10-12-2021 18:11:35,twenty-five-taboos-for-valve-installation-ii,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/twenty-five-taboos-for-valve-installation-ii.jpg,standard,open,open,,,
Twenty five taboos for valve installation-I,,"<h1>Twenty five taboos for valve installation-I</h1>
<p>Valves are the most common equipment in chemical enterprises. It seems easy to install valves, but if they are not implemented in accordance with relevant technologies, safety accidents will be caused. Today, I would like to share some experience and knowledge about valve installation.</p>
<h2>Valve Installation Taboo 1</h2>
<p>If a construction takes place under the winter-like weather conditions, a water pressure test is to be carried out in below zero temperatures.</p>
<p><strong>Consequences</strong>: while conducting a water pressure test, the pipe freezes quickly due to the below zero temperatures.</p>
<p><strong>Measures</strong>: carry out a hydraulic test before the construction under winter weather conditions commences. Empty the water from the tubes after the pressure test has been completed. Any liquid must especially be removed from the <strong><a href='/product-category/check-valve'>valve</a></strong> to prevent its oxidation, freezing and even cracking in severe cases.</p>
<p>When the water pressure test is carried out in the winter, the project must be carried out in a room temperature environment. The water must be removed from valve and pipes after the pressure test has concluded.</p>
<h2>Valve Installation Taboo 2</h2>
<p>The <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipeline</a></strong> system was not flushed carefully before completion, and the flow rate and speed did not meet the pipeline flushing requirements. It even replaces flushing with water pressure strength test.</p>
<p><strong>Consequences</strong>: the water quality does not meet the operating requirements of the pipeline system, which often results in the reduction or blockage of the pipeline cross-section.</p>
<p><strong>Measures</strong>: use the maximum flow in the system or a water flow speed not less than 3m/s for flushing. The water color and transparency of the discharge outlet should be consistent with the water color and transparency of the inlet water.</p>
",,10-12-2021 18:11:35,twenty-five-taboos-for-valve-installation-i,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/twenty-five-taboos-for-valve-installation-i.jpg,standard,open,open,,,
Valve Degreasing Method,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-degreasing-method.jpg' alt=""A Valve from Agile"" title=""A Valve from Agile""></p>
<h1><a href='/product-category/ball-valve'>Valve</a> Degreasing Method</h1>
<h2>1 Cleaning Steps</h2>
<p>The valve parts must go through the following processes before the assembly:</p>
<p>1.1 According to the processing requirements, some parts need to be polished and the surface should not have processing burrs, etc.;</p>
<p>1.2 All parts are degreased;</p>
<p>1.3 After degreasing is completed, pickling and passivation is carried out, and the cleaning agent does not contain phosphorus;</p>
<p>1.4 Rinse with pure water after pickling and passivation. There should be no residues of chemicals. This step is omitted for carbon steel parts;</p>
<p>1.5 Use non-woven cloth to dry the parts one by one and do not leave the surface of the parts such as wire bristles, or blow dry with clean nitrogen;</p>
<p>1.6 Use non-woven fabric or precision filter paper dipped in analytical pure alcohol to wipe each part until there is no dirty color.</p>
<h2>2 Assembly Requirements</h2>
<p>The cleaned parts must be sealed and stored for installation. The requirements for the installation process are as follows:</p>
<p>2.1 The installation workshop must be clean, or a temporary clean area within the workshop needs to be set up by resorting to solutions such as applying newly purchased color striped cloth or plastic film, etc., to prevent dust from entering during the installation process.</p>
<p>2.2 The assembly workers must wear clean cotton overalls, pure cotton caps, clean shoes, plastic gloves, degreasing, etc.</p>
<p>2.3 The assembly tools must be degreased and cleaned before the assembly process in order to ensure cleanliness.</p>
<h2>3、 Other Requirements</h2>
<p>3.1 Purge the assembled <strong><a href='/product-category/globe-valve'>valve</a></strong> with nitrogen for at least 1 minute.</p>
<p>3.2 The air tightness test must be conducted with pure nitrogen.</p>
<p>3.3 After passing the airtight test, seal it with a clean polyethylene cap. The polyethylene cap should be soaked in organic solvent and wiped clean before use.</p>
<p>3.4 Then seal it with a vacuum bag.</p>
<p>3.5 Final packing.</p>
<p>3.6 Measures must be taken to ensure that the package is not damaged during transportation.</p>
<h2>Agile Valves is an OEM Valves Manufacturer from Shanghai</h2>
<p><strong><a href=""https://agilevalve.com/"">Agile Valves Co., Ltd.</a></strong> is an OEM valves manufacturer and supplier from China. Our business scope covers most types of the automation process. Our manufacturing facilities at the Shanghai valve factory and Taiwan valve Factory are producing valve products that cover a wide range of quick connectors (couplings).</p>
<p>For more information about our products and our business in general, please visit our <strong><a href='/product-category/ball-valve'>Products page</a></strong> and our <strong><a href='/product-category/butterfly-valve'>butterfly valves</a></strong>, <strong><a href='/product-category/ball-valve'>ball valves</a></strong>, safety valves, three-piece ball valves, <strong><a href='/product-category/check-valve'>check valves</a></strong>, carbon steel valves, flange ball valves, flanged swing check valves, <strong><a href='/product-category/seat-valve'>angle valves</a></strong>, one piece ball valves, stainless steel ball valves, stainless steel valves, multi way ball valves, and more.</p>
",,10-12-2021 18:11:35,valve-degreasing-method,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/valve-degreasing-method.jpg,standard,open,open,,,
Valve Types and Applications–II,,"<h1>Valve Types and Applications–II</h1>
<h2><a href=""https://agilevalve.com/products/check-valve/page/1"">Check Valve</a></h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-ii.jpg' alt=""A Check Valve from Agile"" title=""A Check Valve from Agile""></p>
<p><strong><a href=""https://agilevalve.com/products/check-valve/page/1"">Check valves</a></strong> only allow fluids to flow in one direction. The structure of lift check valve is similar to that of stop valve. It uses a ball or piston and is usually supported by a spring. The spring opens under a specified pressure, but closes when the pressure drops, thereby preventing backflow. These valves are generally suitable for high pressure applications. One variant is the <strong><a href=""https://agilevalve.com/news/common-check-valves/"">stop check valve</a></strong> which also acts as a shut-off valve.</p>
<p>The <strong><a href='/product-category/check-valve'>swing check</a></strong> valve uses a hinged gate, which is usually driven by a spring and closes against the port when the pressure drops. These devices are very effective in low-voltage applications. The tilt disc check valve hinges the gate slightly inward to reduce the pressure required for opening. <strong><a href=""https://agilevalve.com/news/selection-and-application-of-the-butterfly-valve/"">Butterfly valves</a></strong> or double-door check valves use two semi-circular gates, which are hinged at the centerline of the valve port and open downstream in the flow direction.</p>
<p>Rubber check <strong><a href='/product-category/ball-valve'>valves</a></strong> are also available, including designs such as flaps and duckbill varieties. Check valves are used for pumps in gas pipes, air pipes, and wherever fluid flow is required in one direction. They can be miniaturized, made of plastic, and may contain many special features, such as metal valve seats.</p>
<h2>Plug Valve</h2>
<p>Plug valves are used in drain tanks, etc., and usually include threaded devices for opening and closing. They can also be used as low-pressure shut-off valves, usually using a quarter-turn rod. The main specifications include <strong><a href='/product-category/ball-valve'>valve</a></strong> type, port connection, valve size and construction materials. Plug valves are used in a range of product applications, including radiators, heaters, water tanks, boilers, laboratory glassware, air systems, water tanks, barrels, etc.</p>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-ii-2.jpg' alt=""L-shaped Passage"" title=""L-shaped Passage""></p>
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What is a Pneumatic Valve?,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/what-is-a-pneumatic-valve.jpg' alt=""Our valves"" title=""Our valves""></p>
<h1>What is a <a href='/product-category/ball-valve'>Pneumatic Valve</a></h1>
<h2>Principle analysis of pneumatic valve</h2>
<p>Pneumatic valves are not unfamiliar to everyone. Generally speaking, as long as they can maintain a normal flow rate, they can save space. When using a single-acting pneumatic valve, you should choose normally open or normally closed functions. Pneumatic valves are widely used for frequent start-ups in a short period of time, with the characteristics of sensitive response and accurate action, and are used with solenoid valves. Pneumatic control can accurately control the flow of gas and liquid, and can achieve the requirements of accurate temperature control and dripping liquid. <strong><a href=""https://agilevalve.com/about-us/"">Our valve series</a></strong> products are made of stainless steel casting and polytetrafluoroethylene, which can be used in most gas, liquid, steam and corrosive occasions. It has a radiator to protect the actuator. To ensure that the pneumatic valve has a long life and flexible installation position, the positioning of the pressure port needs to be facilitated. This is achieved by the actuator housing rotating for 350 degrees to enhance flexibility and attaching a standard display of open or closed status.</p>
<h2>Installation Procedure of the Pneumatic Valve</h2>
<ol>
<li>
<p>The first step to install a pneumatic valve is to check its model and parameters that need to pass the needs of on-site installation and technical requirements . Check the cylinder and position indicator of the pneumatic valve to ensure that there is no damage.</p>
</li>
<li>
<p>Before installation, we need to clean the pipeline of the pneumatic valve. If there are impurities in the quality, then it is necessary to install a filter pressure reducing valve on the pipeline in front of the valve. As indicated by the arrow on the valve body, if the pneumatic valve is equipped with a solenoid valve, pay attention to the connection to ensure good sealing. When the pneumatic valve needs to be connected by welding, avoid high temperature transmission to the packing of the pneumatic valve.</p>
</li>
<li>
<p>Pneumatic valves need regular maintenance to ensure its longer life and also ensure its reliable opening and closing. The thread of the valve stem of the pneumatic valve often rubs against the nut of the valve stem. It is necessary to apply some yellow dry oil, molybdenum disulfide or graphite powder for lubrication to avoid degradation by friction.</p>
</li>
<li>
<p>For valves that are not frequently switched on and off, it is necessary to rotate the hand wheel regularly and add lubricant to the valve stem threads to avoid degradation by friction. This can prevent the phenomenon of seizure. In the case of an outdoor valve, a protective sleeve should be added to the valve stem to prevent rain, snow, dust, rust and dirt.</p>
</li>
</ol>
<p>The above article is an introduction into analysis of the principle of the pneumatic valve, as well as the relevant content of the steps to install the pneumatic valve. Hopefully, it will be helpful to everyone. Please stay <strong><a href='/product-category/ball-valve'>valves</a></strong> and properly mainta</p>
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Valve Types and Applications–IV,,"<h1>Valve Types and Applications–IV</h1>
<h2>Globe Valve</h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-iv.jpg' alt=""A Globe Valve from Agile"" title=""A Globe Valve from Agile""></p>
<p>The <strong><a href='/product-category/globe-valve'>globe valve</a></strong> is named for its spherical valve body. The spherical valve body was once very common and also named for its use of a spherical valve disc. The spherical valve disc restricts the flow by closing the restriction hole. The valve flap on the manually operated valve is opened and closed by the hand wheel, and the valve flap on the automatic valve is opened and closed by the actuator and the sliding shaft. The main specifications include valve type, port configuration, port connection, valve size, and the materials that make up the valve body, such as valve seats, seals, linings and stem packing.</p>
<p>The stop valves are used for closing and regulating, for example, in wastewater treatment plants, food processing plants and processing plants. The most common type is the <strong><a href='/products/zvf-150lbs10k/"">Z-type valve</a></strong>, which is called the Z-type valve because of the path of the fluid through the valve body. These two right-angle rotations that the fluid must pass through are responsible for the relatively high head loss of this design. The less restrictive design is the Y-type valve, which makes the stem and the valve body at a 45° angle. The other type is the <strong><a href=""https://agilevalve.com/news/application-of-angle-seat-valve'>angle valve</a></strong>, which rotates the flow by 90°.</p>
<p>The shape of the valve disc can be changed to produce a valve that can quickly reach full flow, or, by using a more tapered valve plug design, to produce a valve that can accurately adjust the flow.</p>
<p>The stop valve can seal the fluid flow or seal together with the fluid flow according to the installation requirements (i.e. fault closed and fault open). The main function of the selection is to determine the size of the actuator. Like <strong><a href=""https://agilevalve.com/news/advantages-and-disadvantages-of-soft-seal-gate-valve/"">gate valves</a></strong>, shut-off valves can be of rising stem or NRS type.</p>
<h2>Needle Valve</h2>
<p><strong><a href='/product-category/needle-valve'>Needle valves</a></strong> are used to measure fluid flow through <strong><a href='/product-category/seat-valve'>valve seats</a></strong>, seals, linings and stem packing. <strong><a href='/product-category/needle-valve'>Needle valves</a></strong> are used in vacuum systems and metering systems that require precise flow adjustment. Due to the large number of turns required to close the needle valve, they are not suitable for shutting down service applications.</p>
",,10-12-2021 18:11:35,valve-types-and-applications-iv,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-iv.jpg,standard,open,open,,,
Valve Types and Applications–III,,"<h1>Valve Types and Applications–III</h1>
<h2>Diaphragm Valve</h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-iii.jpg' alt=""A Diaphragm Valve from Agile"" title=""A Diaphragm Valve from Agile""></p>
<p>Diaphragm valves use flexible membranes to close the fluid in the <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipeline</a></strong>. Like pinch valves, the diaphragm completely seals the drive device from the process fluid, which is beneficial for valves in sanitary facilities. The main specifications include port configuration, port connection, valve size, medium and sealing material. Diaphragm <strong><a href=""https://agilevalve.com/news/valve-degreasing-method/"">valves</a></strong> are mainly used in the pharmaceutical, cosmetic, food and semiconductor industries. Sometimes, a control valve driven by a pneumatic diaphragm is erroneously called a &quot;diaphragm valve.&quot; Readers should pay attention to this distinction.</p>
<h2>Gate Valve</h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-iii-1.jpg' alt=""A Gate Valve from Agile"" title=""A Gate Valve from Agile""></p>
<p><strong><a href=""https://agilevalve.com/news/advantages-and-disadvantages-of-soft-seal-gate-valve/"">Gate valves</a></strong> are mainly used to prevent fluid flow and are unlikely to be used for flow regulation. The gate valve uses a plate-shaped barrier that can be lowered into the water flow to stop the water flow. Its operation is similar to that of a stop valve, except that when the valve is in the fully open position, the flow limit provided by the gate is less than the flow limit of the stop valve plug. The main specifications include port configuration, port connection, valve size, and the materials that make up the valve body, valve seat, seal, lining and stem packing.<br>
<strong><a href=""https://agilevalve.com/news/advantages-and-disadvantages-of-soft-seal-gate-valve/"">Gate valves</a></strong> can use wedge plugs or parallel plates. The valve plug usually seals the upstream and downstream sides of the valve, while the valve plate usually seals only the upstream surface. The wedge can adopt a variety of design schemes to reduce or adapt to the wear of the sealing surface. Although gate valves have the advantage of having less head loss when opened compared to shut-off valves, they are not suitable for throttling and may not produce the positive closing provided by the shut-off valves. Gate valves are used in wastewater treatment plants, power plants and process plants for shutting down and isolation.<br>
Gate valves are usually designated as rising and rising stem designs. The advantage of rising stem valves is that they can easily observe whether the valve is open or closed. The advantage of non-rising stem or NRS valves is that the stem is protected from <strong><a href=""https://agilevalve.com/news/valve-degreasing-method/"">corrosion</a></strong> or other environmental conditions by the bonnet. Both designs have little impact on the actual valve function.</p>
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What to do when a valve in use leaks? What are the main reasons for leakage?,,"<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/what-to-do-when-a-valve-in-use-leaks-what-are-the-main-reasons-for-leakage.jpg' alt=""A Valve from Agile"" title=""A Valve from Agile""></p>
<h1>What to do when a <a href='/product-category/ball-valve'>valve</a> in use leaks? What are the main reasons for leakage?</h1>
<h2>1、 Leakage caused by the closing parts falling off the pipes</h2>
<h3>Reasons:</h3>
<ol>
<li>
<p>The poor operation causes the closing part to get stuck or exceed the top dead center which breaks and damages the connection.</p>
</li>
<li>
<p>The closing part is not firmly connected and falls off due to looseness.</p>
</li>
<li>
<p>The material of the connector is not suitable and therefore cannot withstand the corrosion of the medium and mechanical wear.</p>
</li>
</ol>
<h3>Maintenance methods:</h3>
<ol>
<li>
<p>Ensure the correct operation; do not close the <strong><a href='/product-category/ball-valve'>valve</a></strong> too intensively; opening the valve should not exceed the top dead center; if the valve is fully opened the hand wheel should be slightly reversed.</p>
</li>
<li>
<p>The connection between the closing part and the valve stem must be firm. The thread connection must be provided with a stop piece.</p>
</li>
<li>
<p>The fastener used for connecting the closing part and the valve stem must withstand corrosion of the medium and have certain mechanical strength and wear resistance.</p>
</li>
</ol>
<h2>2、 Leakage at the packing (external leakage of the <strong><a href='/product-category/ball-valve'>valve</a></strong>, the proportion of packing is the largest)</h2>
<h3>Reasons:</h3>
<ol>
<li>
<p>Improper selection of packing, improper corrosion resistance of the medium, high pressure or vacuum, high temperature or low temperature of a valve.</p>
</li>
<li>
<p>The packing is not installed correctly and there are some defects such as replacing the big with small, bad spiral winding joint, tightening and loosening.</p>
</li>
<li>
<p>The filler has aged and lost its elasticity due to wear and tear.</p>
</li>
<li>
<p>The accuracy of the valve stem is not high, along with bending, corrosion, wear and other possible defects.</p>
</li>
<li>
<p>The number of the packing rings is insufficient and the gland is not pressed tightly.</p>
</li>
<li>
<p>The gland, bolts and other parts are damaged. Therefore the gland cannot be compressed.</p>
</li>
<li>
<p>Improper operation, excessive force, etc.</p>
</li>
<li>
<p>The gland is skew and the gap between the gland and the valve stem is too small or too big, resulting in the wear of the valve stem and the damage of the packing.</p>
</li>
</ol>
<h3>Maintenance methods:</h3>
<ol>
<li>
<p>Materials and types of fillers should be selected according to the working conditions.</p>
</li>
<li>
<p>The packing should be installed correctly according to the relevant regulations. The packing should be placed and compacted one by one. And the joint should be at 30 ℃ or 45 ℃.</p>
</li>
<li>
<p>The packing should be replaced on time to avoid malfunctions due to aging, corrosion, wear and tear.</p>
</li>
<li>
<p>The valve rod should be straightened and repaired after bending and wearing. A seriously damaged valve rod should be replaced on time.</p>
</li>
<li>
<p>The packing should be installed according to the specified number of turns. The gland should be tightened symmetrically and evenly. And the pressing sleeve should have a pre-tightening clearance of more than 5mm.</p>
</li>
<li>
<p>Damaged gland, bolt and other parts should be repaired or replaced on time.</p>
</li>
<li>
<p>The operating procedures should be followed, except for the impact type hand wheel. The operation should be carried out with a constant speed and normal force.</p>
</li>
<li>
<p>The gland bolts should be tightened evenly and symmetrically. If the gap between the gland and the valve stem is too small, the gap should be increased appropriately. If the clearance between the gland and the valve stem is too large, it should be replaced.</p>
</li>
</ol>
<h2>3、 Leakage of sealing surface</h2>
<h3>Reasons:</h3>
<ol>
<li>
<p>The sealing surface is grinded unevenly and the sealing line cannot be formed.</p>
</li>
<li>
<p>The top center of the connection between the valve stem and the closing part is suspended, out of alignment or worn.</p>
</li>
<li>
<p>The valve rod is bent or the assembly is not correct. Therefore the closing part is skewed or does not meet the center.</p>
</li>
<li>
<p>Improper selection of the sealing surface material or failure to select a valve according to the working conditions.</p>
</li>
</ol>
<h3>Maintenance methods:</h3>
<ol>
<li>
<p>According to the working condition, the material and type of the gasket should be selected correctly.</p>
</li>
<li>
<p>Ensure a careful adjustment and smooth operation.</p>
</li>
<li>
<p>The bolts should be tightened evenly and symmetrically. If necessary, a torque wrench should be used. The pre-tightening force should meet the requirements and should not be too big or small. There should be a certain pre tightening clearance between the flange and thread connection.</p>
</li>
<li>
<p>The gasket assembly should be centered and aligned and stress should be uniformed. The gasket is not allowed to lap and use double gaskets.</p>
</li>
<li>
<p>If the static sealing surface is corroded/damaged and the processing quality is not high, it should be repaired and checked for coatings to make the static sealing surface meet the relevant requirements.</p>
</li>
<li>
<p>Pay attention to cleaning when installing the gasket. The sealing surface should be cleaned with kerosene, and the gasket should not fall to the ground.</p>
</li>
</ol>
<h2>4、 Leakage at the joint of a sealing ring</h2>
<h3>Reasons:</h3>
<ol>
<li>
<p>A sealing ring is not tightly rolled.</p>
</li>
<li>
<p>A sealing ring is welded with the body and the surfacing quality is poor.</p>
</li>
<li>
<p>The connecting thread, screw and pressing ring of a sealing ring are loose.</p>
</li>
<li>
<p>The sealing ring is corroded due to its connection.</p>
</li>
</ol>
<h3>Maintenance methods:</h3>
<ol>
<li>
<p>The leakage of seal rolling should be fixed by injecting adhesive and rolling.</p>
</li>
<li>
<p>The sealing ring should be re-welded according to the welding specifications. If the repair of a welding cannot be carried out at the surfacing position, the original surfacing and processing should be removed.</p>
</li>
<li>
<p>Remove the screw and pressure ring, clean and replace the damaged parts, grind the sealing and connecting seat sealing surface, and reassemble. The parts with large corrosion damage can be repaired by welding, bonding and other methods.</p>
</li>
<li>
<p>If the joint surface of the sealing ring is corroded, it can be repaired by grinding, bonding and other methods. If it cannot be repaired, the sealing ring should be replaced.</p>
</li>
</ol>
<h2>5、 Body and bonnet leakage:</h2>
<h3>Reasons:</h3>
<ol>
<li>
<p>The casting quality of iron castings is not high and there are sand holes, loose structure, slag inclusion and other defects on the valve body and bonnet body.</p>
</li>
<li>
<p>Cracks caused by sudden extreme low temperatures in cold weather situations.</p>
</li>
<li>
<p>Poor welding, slag inclusion, no welding, stress crack and other defects.</p>
</li>
<li>
<p>The cast iron valve is damaged after being hit by heavy objects.</p>
</li>
</ol>
<h3>Maintenance methods:</h3>
<ol>
<li>
<p>Improve the casting quality and carry out the stress test in strict accordance with the regulations before installation.</p>
</li>
<li>
<p>If operating under 0° temperature conditions, the <strong><a href='/product-category/ball-valve'>valves</a></strong> should be insulated or heated and the water should be pumped out when the valves are out of service.</p>
</li>
<li>
<p>The welding seams of the valve body and valve cover composed of welding should be carried out according to the relevant welding operation procedures. Flaw detection and strength tests should also be carried out after welding.</p>
</li>
<li>
<p>Do not push or place heavy objects onto valves. Likewise, do not use hammers on cast iron and non-metallic valves. Large diameter valves should be installed with supports.</p>
</li>
</ol>
",,10-12-2021 18:11:35,what-to-do-when-a-valve-in-use-leaks-what-are-the-main-reasons-for-leakage,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/what-to-do-when-a-valve-in-use-leaks-what-are-the-main-reasons-for-leakage.jpg,standard,open,open,,,
Valve Types and Applications–V,,"<h1>Valve Types and Applications–V</h1>
<h2>Safety Valve</h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-v.jpg' alt=""A Safety Valve from Agile"" title=""A Safety Valve from Agile""></p>
<p>Pressure relief valves usually use spring-loaded diaphragms to protect pressure systems (such as boilers or pipes) from overpressure conditions. For example, they can also release the pressure inside the storage tank. The main specifications include <strong><a href='/product-category/ball-valve'>valve type</a></strong>, port connection, valve size, pressure rating, intended use and materials of construction.</p>
<p><strong><a href='/product-category/safety-valve'>Safety valves</a></strong> are used in pneumatic compressors, gas lines, and cryogenic systems-in short, any place where overpressure or under-pressure may occur. The pressure and vacuum safety valves operate automatically, but they can be manually driven for testing. Atmospheric safety valve is used on the condenser. The surge control valve is a <strong><a href=""https://agilevalve.com/news/safety-valves-basic-knowledge"">safety valve</a></strong> designed to reduce damage to the hydraulic system due to hydraulic surge.</p>
<h2>Solenoid Valve</h2>
<p><img src='https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-v-1.jpg' alt=""A Solenoid Valve from Agile"" title=""A Solenoid Valve from Agile""></p>
<p>The solenoid valve is an electromechanical device mainly used in oil and air systems to remotely stop and start fluid flow. They rely on electromechanical solenoid valves for direct or pilot operation. They are not normally used for proportional flow control. The main specifications include valve type, port number, port configuration, port connection, valve size, construction material, pressure rating and input voltage.<br>
Solenoid valves are used to drive hydraulic jacks, control hydraulic cylinders on trucks, and control the flow of water, oil or solvent through the <strong><a href=""https://agilevalve.com/products/pipes/page/1/"">pipeline</a></strong> system. They are also widely used in pneumatic systems. The solenoid lock valve is designed to lock the air valve in place without the need to maintain power on the solenoid valve</p>
",,10-12-2021 18:11:35,valve-types-and-applications-v,fronz,publish,https://agilevalve.com/wp-content/uploads/2022/10/valve-types-and-applications-v.jpg,standard,open,open,,,