In this article, we compiled the top 20 companies producing a wide range of valves for different industries. Read on to determine which valve manufacturers you can trust for your business needs.
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While searching for the best valve manufacturer in China, you need to consider several factors.
The first thing to consider is whether the manufacturer has a global market or just a local market.
Many people think that valve manufacturers in China are only based in Shanghai and Shenzhen.
The reality, however, is much more complicated.
Industrial valve manufacturers in China are spread all over the country, and this can be quite overwhelming.
Fortunately, there are companies in China that specialize in valves and can offer you quality products at competitive prices.
To learn more about them, here are some of the best valve manufacturers in China:
What are valves?Valves are mechanical devices that regulate the flow of fluids within a process or system. Their mechanics vary and are governed by the type of fluid and the fluid&#;s temperature and pressure. The speed and precision of their operation are dependent on the valve&#;s mechanical properties. Some valves are manually operated, and others use mechanical levers or gears to operate.
Valve materials can also impact the flow of fluids. If the fluid is in a coffee bag, for example, the valve could not be made of materials that are harmful to the environment, such as plastic. However, when a valve material is used in food packaging, recycling must be an important consideration. This is because coffee can sit on the shelf for up to a year. During this time, the coffee is still giving off carbon dioxide gas, and if it breaks, the coffee bag may burst.
API Flange Stainless Steel Gate ValveFactors to Consider When Choosing Your Valve ManufacturerSelecting the right valve manufacturer is a critical decision that requires a thorough consideration of various factors to ensure optimal performance in a specific application.
This comprehensive evaluation involves factors such as media type, application conditions, valve function, actuation method, and maintenance requirements.
Media TypeThe nature of the liquid or gas being controlled plays a pivotal role in determining the appropriate valve material.
Harsh or corrosive materials may necessitate specific valve materials like PTFE or metal valves, ensuring compatibility and longevity.
Application ConditionsFactors such as temperature, pressure, and flow rate are crucial considerations in the valve selection process.
Choosing a valve capable of withstanding the operating conditions specific to the application is essential.
For instance, opting for metal valves in situations requiring higher temperatures and pressures ensures durability.
Valve FunctionIdentifying the specific purpose the valve serves is fundamental.
Whether it&#;s for on/off control or diverting/mixing media, understanding the valve function aids in selecting the appropriate type, be it 2-way, 3-way, or multipurpose.
Actuation MethodDetermining how the valve will be operated is a key decision.
Whether it&#;s manual or automatic, and if automatic, selecting the suitable actuator type&#;such as electric, pneumatic, or hydraulic&#;ensures efficient and reliable valve operation.
Maintenance RequirementsConsidering the maintenance needs of the valve is vital.
Opting for a valve type that is easy to service and resistant to clogging, like ball valves, can significantly reduce downtime and enhance operational efficiency.
In addition to these technical considerations, assessing the supplier&#;s experience, financial stability, references, and historical performance adds another layer of assurance in the decision-making process.
The supplier&#;s track record and stability contribute to the reliability of the valve manufacturer.
By meticulously evaluating these factors, a well-informed decision can be made, ensuring the selection of the right valve and manufacturer for a specific application.
This not only leads to smooth operations but also mitigates risks, promoting the longevity and effectiveness of the chosen valve.
20 Best Valve Manufacturers in China in Neway Valve-Suzhou Neway Valve Co. Ltd.Suzhou-based Neway is the largest manufacturer of industrial valves in China. Its product range includes ball valves, butterfly valves, and check valves. In addition to these, the company also produces nuclear and safety valves. Many of its products are used in water treatment equipment. The company has several warehouses and sales offices abroad and serves both domestic and foreign clients. As of , 71% of its revenue was generated from exports.
Based in Suzhou, China, the company designs, manufactures, and exports industrial valves. Their products are used in a variety of industries, including the oil and gas, natural gas, and refining industries. Their products meet the highest quality standards and are used worldwide. This company is currently hiring for jobs, so you should apply today if you&#;re interested in working in an exciting, rewarding environment.
SUFA Technology Industry Co. Ltd.SUFA Technology Industry Co. Ltd. designs and manufactures industrial valves and controls for engineering construction projects. Its range of products includes gate valves, globe valves, check valves, diaphragm valves, oil refining valves, and shut-off and relief devices. Their products are used in industries such as oil refining, nuclear power, and municipal engineering.
SUFA has been in the valve industry since the early 80s when it merged with China National Nuclear Corporation. The company was the first in the Chinese valve industry to receive API certification in , and it was granted ISO certification by DNV in and CE certification by the European Community in . The company also has licenses from ABS (U.S.), BV (France), and DNV (Norway). It is also a supplier to China Power, which is a testament to the high quality of its valves.
Yuanda Valve-Yuanda Valve Group Co. Ltd.Located in Longyao county in Hebei province, Yuanda Valve Group Co. Ltd is a manufacturer of middle and low-pressure valves. The company has five branches and employs over three thousand employees. With its diversified product range, Yuanda Valve offers a complete range of industrial products. This is one of the most prominent valve manufacturers in China.
Founded in , Yuanda is one of the largest valve suppliers in China. In addition to producing valves for the oil and gas industries, the company is an active member of the China Guodian and Huaneng corporations&#; supply networks. The company also has qualified tenders from the China National Chemical Construction Group and Wuhan Iron and Steel (Group) Corp. Yuanda also supplies valves to Hebei Iron and Steel Group Co. Ltd. and the State Power Company.
The company has strong international relations and sells its products in more than forty countries worldwide. Yuanda is a trusted name in valve manufacturing, with a reputation for producing quality products. The company has also earned the trust of major international corporations by maintaining two government subsidies in the U.S.A. and Korea. As a result, Yuanda has a strong presence in more than forty countries, including Central and West Asia.
EG Valves Manufacturing Co. Ltd.EG Valves Manufacturing Co. Ltd., founded in , is a professional valve manufacturing company that specializes in R&D, manufacturing, and exporting. The company&#;s products are recognized worldwide, and its manufacturing process follows ANSI and ISO standards. These standards ensure perfect quality control, favorable delivery, and accurate documentation services. These factors make EG Valves a great choice for customers who need high-quality products at a reasonable price.
The company is also recognized as a Vice President unit of the China Valve Association and a National Key High-tech Enterprise. In addition, it is a Zhejiang First Batch Innovative Company and a Tax Credit AAA Company. All these honors make EG Valves Manufacturing Co. Ltd. a top choice for customers and dealers. The company offers a free consultation, on-site installation, technical support, and lifelong pay services for its products.
Sanhua Valve-Zhejiang Sanhua Co. Ltd.The name of this company might be a bit confusing. Apparently, it&#;s a Chinese one, but it actually produces products that are sold all over the world. Founded in , Sanhua started as a manufacturer of refrigeration components but eventually expanded to air conditioning valve components.
Known for its specialized products, Sanhua Valve is a renowned enterprise that manufactures air conditioning and refrigeration control components. Its four-way reversing valve, electronic expansion valve, solenoid valve, electromagnetic valve, and heat exchangers are among the many products available in its catalog. These valves and other mechanical products are highly regarded throughout the world, earning the company numerous honors.
Ameco Valve AMICO-Ningbo Amico Co. Ltd.Amico Valve is located in Ningbo, Zhejiang, China. They specialize in producing copper valves and other valve-related equipment. The company also produces water meters and faucets. It is one of the largest copper valve producers in China. They have been certified with the ISO: quality management system. If you want to know more about Amico Valve, please visit their website.
The company was established in and is listed as the first valve manufacturing company in China. The company&#;s products are used in more than 10 industries. They are one of the most popular brands in China. They are also certified by API 6D and ISO, demonstrating their quality and commitment to customer satisfaction. AMICO-Ningbo Amico Co. Ltd. provides valves for many industries, including power, gas, water, chemicals, food, and beverages.
As a leader in the manufacturing industry, Ameco Valve is one of the most trusted names in the industry. This company has over 20 years of experience in this industry and specializes in valves for all industries. This means that its products are reliable and will stand up to the most rigorous conditions. These valves are used in a variety of industries, including food, beverage, and medical applications.
Langao Valve-Lanzhou High-Pressure Valve Co. Ltd.Lanzhou High-Pressure Valves Co., Ltd. is a Chinese valve manufacturer based in Lanzhou. It was established in as a state-owned enterprise. Since then, the company has been regarded as a leading manufacturer of high-pressure valves. It has a total investment of 100 million yuan, covers an area of at least 380 acres, and has developed 58 new products in recent years. In fact, the company has been supplying valves to many national ventures, which is a testament to the quality of its products.
The company&#;s engineering team is highly skilled, with a vast amount of experience in product design. Its manufacturing facilities include a wide range of testing and design tools. The company also has a full suite of valve manufacturing techniques, including designing, casting, forging, heart treatment, machining, assembly, and inspection. Its valves are used widely in power plants, metallurgy, coal chemical, oil and gas gathering, petroleum refining, and more.
Jiangnan Valve-Jiangnan Valve Co. Ltd.The company has more than two decades of experience in the industry and specializes in the design, manufacturing, and marketing of valves for different applications, including power generation, water treatment, and industrial. The company&#;s products have an extensive catalog that includes butterfly pattern check valves, fast-closing valves, and CKH butterfly pattern check valves. The company is a member of the American Society of Mechanical Engineers, the Society of Petroleum Engineers, and the American Society of Engineering.
Jiangnan Valve Co. Ltd. is a leading manufacturer of butterfly valves. This company was founded in and is a direct subsidiary of Jiangnan Holding Group. Through the years, the company has been expanding its capabilities, establishing itself as one of the leading valve manufacturers in China. Its eight-thousand-square-meter manufacturing facility has been certified according to ISO, CE, EN, and ASME standards.
Beijing Brand Valve &#;Beijing Valve General FactoryWhen you are in the market for a new valve, you might be wondering what to look for. The good news is that Beijing Brand Valve has been in the industry for over 60 years, which is a great deal of experience. The company&#;s expertise in this particular industry has helped it become a leader in the field. While the company&#;s products can differ slightly from competitors&#;, they all feature quality and durability.
Beijing valves have won high recognition both at home and abroad. The company prides itself on providing first-class products and perfect services to its customers. As a result, it has expanded exponentially over the years, forming partnerships and connections with other leading companies. In addition to its quality valves, Beijing Valve Group Co., Ltd. has also become a leader in valve manufacturing.
With such an extensive portfolio of products, it can be difficult to choose which one to purchase. With so many options available, it is important to choose the best one for your project. The best valve manufacturers are those that can provide a full range of solutions for your business.
BONUS: Xintai Valve Group Co., LTD.Established in , Xintai emerges as a shining example of unwavering commitment to exceptional quality and continuous advancement, making it a trusted and dynamic valve manufacturer based in China.
Boasting an impressive annual production exceeding 270,000 industrial valve units, Xintai has become a reliable name in the industry.
Among Xintai&#;s noteworthy offerings are its stainless steel check valve specialties, such as the following:
These products showcase Xintai&#;s dedication to diverse and high-quality valve solutions.
What truly sets Xintai apart is its dedicated team of experts and meticulous quality control specialists.
Through their collaborative efforts, Xintai ensures the production of top-notch valve products that have garnered trust from businesses globally, establishing a strong presence both on the global and international stage.
At Xintai, excellence is not merely a goal; it is a consistent reality reflected in the reliability and performance of its products.
Xintai&#;s dominance in the market is attributed to its reliance on advanced technologies, supported by four manufacturing bases and eight casting production lines.
This strategic approach underscores Xintai&#;s commitment to staying at the forefront of innovation, meeting diverse industry needs with efficiency.
For those seeking excellence in valve solutions, Xintai invites you to contact them through their website.
Whether through its extensive product range, cutting-edge technologies, or dedicated team, Xintai stands as a beacon of quality and progress in the field of valve manufacturing.
Their collective efforts ensure the production of high-quality valve products that have earned the trust of businesses worldwide, both on a global and international scale.
Shanghai Valve Factory Co., Ltd.Established in , Shanghai Valve Factory Co., Ltd. is one of the oldest valve manufacturers in China.
The company is renowned for its extensive experience and innovation in valve technology.
Over the decades, Shanghai Valve Factory has built a strong reputation for quality and reliability, serving various industries with precision-engineered valve solutions.
Best-Selling Products:
Shanghai Valve Factory stands out due to its long history, commitment to quality, and continuous innovation.
The company has a strong reputation for producing durable and reliable valves that meet international standards.
Their dedication to customer satisfaction and comprehensive after-sales support further enhances their position as a leading valve manufacturer.
CNNC Sufa Technology Industry Co., Ltd.CNNC Sufa, founded in , is a leading manufacturer specializing in nuclear-grade valves.
The company is a subsidiary of China National Nuclear Corporation (CNNC).
Best-Selling Products:
CNNC Sufa is distinguished by its focus on the nuclear industry, stringent quality control, and adherence to international safety standards.
Their products are essential for the safe and efficient operation of nuclear power plants.
Huangshan Industrial Pump & Valve Co., Ltd.Established in , Huangshan Industrial Pump & Valve Co., Ltd. specializes in manufacturing a wide range of industrial valves and pumps.
Best-Selling Products:
Huangshan Industrial Pump & Valve is known for its extensive product range, high-quality materials, and innovative designs.
The company is committed to providing reliable solutions for various industrial applications.
China Valve Technology Co., Ltd.China Valve Technology Co., Ltd. is a prominent valve manufacturer with a strong focus on research and development.
The company serves numerous industries, including oil and gas, chemical, and power generation.
Best-Selling Products:
China Valve Technology is recognized for its innovative approach to valve design, high-performance products, and commitment to customer satisfaction.
Their valves are known for their longevity and reliability in harsh environments.
Zhejiang Zhedong Valve Co., Ltd.Founded in , Zhejiang Zhedong Valve Co., Ltd. has grown into a leading valve manufacturer in China.
The company offers a comprehensive range of valve products for various industries.
Best-Selling Products:
Zhejiang Zhedong Valve is distinguished by its extensive product portfolio, high-quality manufacturing processes, and strong customer service.
The company is dedicated to meeting the diverse needs of its global clientele.
Zhejiang Petrochemical Valve Co., Ltd.Zhejiang Petrochemical Valve Co., Ltd. was established in and specializes in valves for the petrochemical industry.
The company is known for its expertise in designing valves for high-pressure and high-temperature applications.
Best-Selling Products:
Zhejiang Petrochemical Valve stands out due to its specialization in the petrochemical sector, high-quality products, and strong emphasis on research and development.
The company is committed to innovation and excellence in valve manufacturing.
Chaoda Valve Group Co., Ltd.Founded in , Chaoda Valve Group Co., Ltd. is a major player in the valve manufacturing industry.
The company provides a wide range of valve products for various industrial applications.
Best-Selling Products:
Chaoda Valve Group is recognized for its comprehensive product range, advanced manufacturing techniques, and commitment to quality.
The company has a strong reputation for delivering reliable and efficient valve solutions.
Kangsaite Valve Group Co., Ltd.Kangsaite Valve Group Co., Ltd., established in , is known for its high-quality valve products and innovative designs.
The company serves industries such as oil and gas, power generation, and chemical processing.
Best-Selling Products:
Kangsaite Valve Group stands out due to its commitment to innovation, high-quality products, and customer-focused approach.
Are you interested in learning more about electric single seat control valve from china manufacturer? Contact us today to secure an expert consultation!
The company is dedicated to meeting the evolving needs of its clients with reliable and efficient valve solutions.
China Yuanda Valve Group Co., Ltd.China Yuanda Valve Group Co., Ltd., founded in , is one of the oldest valve manufacturers in China.
The company is known for its extensive experience and expertise in valve production.
Best-Selling Products:
China Yuanda Valve Group is distinguished by its long history, high-quality products, and strong commitment to innovation.
The company is a trusted name in the valve industry, providing reliable solutions for diverse applications.
Hubei Hongcheng General Machinery Co., Ltd.Hubei Hongcheng General Machinery Co., Ltd. was established in and specializes in the production of industrial valves for various sectors, including oil and gas, chemical, and power generation.
Best-Selling Products:
Hubei Hongcheng General Machinery is known for its high-quality products, advanced manufacturing processes, and strong customer service.
The company is dedicated to providing reliable and efficient valve solutions for its global clientele.
Their commitment to continuous improvement and innovation ensures that they stay at the forefront of the valve industry.
With a wide range of products designed to meet the needs of various industries, Hubei Hongcheng remains a trusted partner for businesses seeking high-performance valve solutions.
Common Types of Industrial ValvesIndustrial valves play a crucial role in controlling the flow of liquids and gases within various systems, ensuring the efficient and safe operation of industrial processes.
There are several common types of industrial valves, each designed for specific applications based on their unique features and functionalities.
Here are some of the common types of industrial valves:
Gate ValvesGate valves are designed for on-off applications, providing a straight-through flow path when fully open.
Applications: Well-suited for high-pressure and high-temperature environments.
Globe ValvesGlobe valves are ideal for regulating flow, offering precise control over the fluid by adjusting the position of the disk.
Applications: Used in applications requiring accurate flow regulation.
Ball ValvesPart of the quarter-turn valve family, ball valves use a rotating ball to control the flow, offering quick shut-on/off capabilities.
Applications: Widely used for their reliability in various industries.
Butterfly ValvesButterfly valves feature a disk that rotates on a shaft, regulating flow through a quarter turn.
Applications: Commonly used in automation and oil & gas industries due to their compact design and ease of operation.
Check ValvesCheck valves are designed to allow flow in one direction, preventing backflow.
Applications: Suitable for applications where one-way flow is essential.
Pressure ValvesPressure valves are employed to regulate pressure within a system, ensuring it stays within specified limits.
Applications: Essential in systems where pressure control is critical.
Diaphragm ValvesDiaphragm valves use a flexible diaphragm to control flow, making them suitable for applications requiring hygiene and cleanliness.
Applications: Commonly used in the food and pharmaceutical industries.
Needle ValvesNeedle valves are designed for precise flow control, allowing for fine adjustments.
Applications: Used in applications where accurate control of flow is essential.
Pinch ValvesPinch valves regulate flow by pinching a flexible tube, making them suitable for applications with a wide range of flow rates.
Applications: Used in scenarios where varying flow rates are required.
When selecting an industrial valve, it&#;s crucial to consider factors such as the type of fluid, flow control requirements, operating conditions, and the specific application.
Each type of valve serves a unique purpose, contributing to the overall efficiency and safety of industrial processes.
Key TakeawayIn the industrial valve industry, China has emerged as a powerhouse for manufacturing, with numerous companies offering a wide array of high-quality products.
The key takeaway is that the best manufacturers in China are characterized by their commitment to cutting-edge technology, stringent quality assurance practices, and a diverse range of valve solutions.
These manufacturers prioritize safe and sound operations, providing customized solutions tailored to meet the unique needs of various industries.
Their offerings encompass premium quality valves of varied types, ensuring cost-effectiveness without compromising on innovation.
Timely delivery and end-to-end solutions underscore their dedication to meeting global demands, establishing China as a formidable hub for top-notch industrial valve manufacturing.
Choice of valve type
1. To determine the
nominal pressure
, instead of using Pmax to cover the PN, find the corresponding PN from the table according to the three conditions of temperature, pressure and material and satisfy the PN value of the selected valve.2. The determined valve type , its leakage meets the process requirements.
3. The working pressure difference of the determined valve type should be less than the allowable pressure difference of the valve. If not, it must be considered from a special angle or another valve should be selected.
4. The temperature of the medium is within the working temperature range of the valve, and the ambient temperature meets the requirements.
5. Consider the anti-blocking problem of the valve according to the unclean condition of the medium.
6. Consider the corrosion resistance of the valve according to the chemical properties of the medium.
7. Consider the erosion and wear resistance of the valve according to the pressure difference and the medium containing hard objects.
8. The performance and price ratio considering the comprehensive economic effect.
You need to consider 3 issues:
9. Optimal order.
Choice of Executor
1. The simplest is the pneumatic film type, followed by the piston type, and finally the electric type.
2. The main advantage of electric actuators is that the driving source (power supply) is convenient, but the price is high, reliability, waterproof and explosion-proof are not as good as pneumatic actuators, so the pneumatic type should be preferred.
3. The old electric actuators are heavy and heavy, and we have already provided electronic small, small and highly reliable electric actuators (the price is correspondingly high).
4. The old ZMA and ZMB thin-film actuators can be eliminated and replaced by multi-spring light actuators (the performance is improved, and the weight and height are reduced by about 30%).
5. There are many varieties and specifications of piston actuators, and the old, big and stupid ones are no longer recommended, but a new light structure is used.
Material selection:
1. The valve body pressure rating, operating temperature and corrosion resistance should not be lower than the requirements of the process connection pipeline, and the manufacturer&#;s finalized products should be preferred.
2. Cast iron valves are not suitable for water vapor or wet gas with more water and flammable and explosive media.
3. When the ambient temperature is lower than -20°C (especially in the north), cast iron valves should not be used.
4. In the Cartesian coordinates formed by the medium temperature and pressure difference with serious cavitation and erosion, when the temperature is 300°C and the pressure difference is 1.5MPa in the area beyond the line connecting the two points, the throttling sealing surface should be Choose wear-resistant materials , such as cobalt-based alloys or surface surfacing Stellite alloys.
5. For strong corrosive media, the selection of corrosion-resistant alloys must be based on the type, concentration, temperature and pressure of the medium, and appropriate corrosion-resistant materials must be selected.
6. The valve body and the throttling part are treated separately. The throttling speed of the valve body wall is small and a certain degree of corrosion is allowed. The corrosion rate can be about 1 mm/year; the throttling part is eroded by high speed and corroded, which will cause leakage and increase. If it is large, the corrosion rate should be less than 0.1mm/year.
7. When selecting the lining material (rubber, plastic), the temperature, pressure and concentration of the working medium must meet the use range of the material, and consider the physical and mechanical damage (such as shear damage) of the valve when it acts. ..
8. The vacuum valve should not be lined with rubber or plastic in the valve body.
9. The two-position shut-off valve of the water treatment system should not be made of rubber-lined materials.
10. Typical corrosion-resistant alloy material selection for typical media:
&#;
Sulfuric acid: 316L, Hastelloy, Alloy 20.&#;
Nitric acid: aluminum, C4 steel, C6 steel.&#;
Hydrochloric acid: Hastelloy B.&#;
Hydrofluoric acid: Monel.&#;
Acetic acid, formic acid: 316L, Hastelloy.&#;
Phosphoric acid: Inconel, Hastelloy.&#;
Urea: 316L.&#;
Caustic soda: Monel.&#;
Chlorine: Hastelloy C.&#;
Seawater: Inconel, 316L.11. So far, the most versatile corrosion-resistant material is tetrafluoroethylene, which is called &#;corrosion-resistant king&#;.
Therefore, the PTFE corrosion-resistant valve should be selected first, and the alloy should be selected only if it is unavoidable (such as temperature>180&#;, PN>1.6).
Choice of flow characteristics
The following are preliminary selections. For detailed selections, please refer to the special materials.
1. The logarithmic characteristic is selected when S>0.6.
2. The logarithmic characteristic is selected when working with small opening and when the unbalanced force changes greatly.
3. The required adjusted parameter reflects the straight line when the speed is fast, and the logarithm when it is slow.
4. The linear characteristic of the pressure regulation system is optional.
5. The linear characteristic of the liquid level adjustment system is optional.
Action mode selection
1. It is commonly used in foreign countries to indicate that it is open or closed under fault, that is, fault open and fault close, which is exactly the opposite of my country&#;s air open and air closed.
2. The new light valve and fine small valve no longer emphasize the positive and negative effects of the execution machinery, so they must be marked on the endnote.
Choice of spring ranges
1. The first is to select the spring range, and also to determine the working spring range.
2. Determining the working spring range involves calculating the output force to overcome the unbalanced force. If there is any difficulty, the conditions (mainly the pressure difference when the valve is closed) should be told to the manufacturer to assist in the calculation and adjustment of the spring and the working range before leaving the factory (at present, many manufacturers do not do the calculation at all).
Choice of flow direction
1. At the throttling port, the flow of the medium in the opening direction of the valve core is flow opening, and the flow in the closing direction is flow closing.
2. The choice of flow direction is mainly single-sealed regulating valve , which includes three categories: single-seat valve, angle valve, and single-sealed sleeve valve. It is based on the specified flow direction (such as double seat valve, V ball) and arbitrary flow (such as O ball).
3. When dg>15, the flow is usually selected to be open. When dg&#;15, the small-diameter valve, especially the high-pressure valve, can be selected to be closed to improve the service life.
4. Optional flow and close for the two-position switch valve.
5. If the flow-closed valve oscillates, change it and the flow-open type can be eliminated.
Choice of fillers
1. Commonly used in regulating valves are tetrafluoro &#;V&#;-shaped packing and graphite &#;O&#;-shaped packing.
2. The tetrafluoro packing has small friction, but has a short temperature difference and a short life; the graphite packing has large friction, but has good temperature resistance and long life; it is recommended to choose graphite packing under high temperature and for valves with positioners.
3. If the tetrafluoro packing is often replaced, graphite packing can be considered.
Choice of accessories
1. The accessories of the regulating valve mainly include: positioner, converter, relay, booster valve, position retaining valve, pressure reducing valve , filter, lubricator, travel switch, position transmitter, solenoid valve, Handwheel mechanism.
2. The accessories play a supplementary function and ensure the operation of the valve. Increase when necessary, not increase when unnecessary. Adding accessories when not necessary increases the price and reduces reliability.
3. The main function of the positioner is to improve the output force and action speed. When these functions are not required, it can be omitted. It is better not to bring the positioner.
4. For fast response systems, the valve does not act quickly, and a converter is optional.
5. For strict explosion-proof occasions, optional: electrical converter + pneumatic positioner.
6. The solenoid valve should choose a reliable product to prevent it from not moving when it is required to act.
7. In important occasions, it is recommended not to use the handwheel mechanism to prevent human error.
8. It is best to provide by the manufacturer and supply the assembly on the valve to ensure the reliability of the connection between the system and the assembly.
9. When ordering, the name, model, specification, input signal, output signal, etc. of the accessories should be provided.
10. To reiterate: Please pay attention to the importance of these &#;little things&#;, especially reliability. If necessary, pneumatic components such as solenoid valves can be provided.
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