Based on publicly available industry data, company websites, and authoritative rankings in 2025, this article selects ten Chinese valve manufacturers that are representative in terms of technology, production capacity, qualifications, and market performance. The ranking emphasizes overall corporate capability and market influence, aiming to provide a reference for procurement and engineering selection.   Suzhou Neway Valve Co., Ltd. (Brand: NEWAY) Neway is one of the few domestic valve manufacturers capable of serving high-end applications such as deep-sea, LNG, and nuclear power. The company possesses comprehensive technology and international certifications, with outstanding production capacity and project support capabilities. It holds a significant share in large-scale projects and export markets, making it a representative of leading domestic valve enterprises.     DERVOS VALVE (Brand: DERVOS VALVE) DERVOSVALVE' s product line covers a full range of valves, including ball valves, butterfly valves, gate valves, globe valves, and check valves. The company holds comprehensive technology and international certifications, ensuring its products meet the requirements of various operating conditions and markets. With in-house manufacturing capabilities and first-class supply strength, DERVOS VALVE can offer customers excellent delivery speed and consistent quality assurance. The company supports orders starting from a single unit (MOQ≧1) and provides one-stop services from inquiry and quality inspection to final delivery.     Lianggu Valve Group Co., Ltd. (Brand: Lianggu) Lianggu specializes in forging, casting, and CNC machining, offering a comprehensive range of valve specifications across multiple manufacturing sites and its own casting and forging facilities. The company is well-suited for mid-to-high-end engineering projects and maintains stable clients and standardized capabilities in sectors such as nuclear power and petrochemicals.     CNNC Suzhou Valve Technology & Industrial Co., Ltd. (Brand: CNNC Su Valve) CNNC Su Valve originates from the state-owned system and has long been responsible for supplying valves for nuclear power and major engineering projects. Its qualifications and testing capabilities are among the industry' s leading standards. The company possesses irreplaceable engineering experience in high-integrity and specialty valves.     Suzhou Dawson Drilling & Production Equipment Co., Ltd. Founded in 2006, the company primarily manufactures oil and gas drilling and production equipment as well as valve products. Its products are widely used in the energy sector, including oil and natural gas. With strong R&D and manufacturing capabilities, Dawson maintains a stable position in both the drilling equipment and industrial valve markets.   Zhejiang KCM Valve Co., Ltd. (KCM Valve) KCM Valve has long focused on the research and manufacturing of marine valves. Its products ...

Have you ever encountered repeated fluid shocks, frequent valve cycling, or excessive noise in your pipeline system? If a check valve is not selected properly, issues such as leakage, valve damage, or fluid hammer can occur. While check valves are effective at preventing backflow, they are not suitable for all operating conditions. The following cases require special attention:   High-frequency opening and closing conditions Check valves rely on the disc or flap to close automatically. If the medium in the pipeline flows frequently or the valve cycles too often, impact, water hammer, or vibration may occur, shortening the valve’s service life. In such cases, consider using spring-loaded or damped check valves, or even other valve types better suited to the application.   High-viscosity fluids or media with solid particles Thick fluids or those containing solids can prevent the valve disc from closing fully, increasing the risk of leakage. For slurries, mud, or liquids with a high concentration of particles, specialized valves or additional filtration equipment should be used instead.   High-pressure systems In high-pressure applications, the valve disc is subject to strong impacts and repeated collisions, which can cause wear on the sealing surfaces or structural damage. For such environments, more robust backflow prevention solutions should be considered.   Systems Sensitive to Pressure or Flow Variations When a check valve closes, it may cause pressure loss or flow fluctuations. If the system is highly sensitive to such variations, careful evaluation of the valve type and installation location is required to avoid negative impacts on overall pipeline performance.   Conclusion A check valve is an essential device for preventing backflow, but it should be used with caution in certain operating conditions such as high-frequency cycling, high-viscosity fluids, high-pressure systems, or applications sensitive to flow variations. By properly assessing the pipeline operating conditions and fluid characteristics, you can ensure the check valve performs at its best, extends service life, and reduces maintenance costs.

Have you ever faced the challenge of selecting the right globe valve disc during pipeline system design or operation? When using a globe valve to control fluid flow, the disc type directly affects sealing performance, flow regulation, and suitability for specific conditions. Understanding the types of discs and their applications can help you make faster, more accurate selections and improve overall system efficiency.   Flat / Standard Disc   Features: The disc has a flat sealing surface, simple structure, and relatively low manufacturing cost. Applications: Commonly used for water, steam, air, and other low-viscosity media. Suitable for medium to low-pressure systems.   Pros & Cons: Provides basic and reliable shutoff, but sealing reliability is moderate. Under long-term high pressure or high temperature, the sealing surface may wear more quickly.   Conical / Tapered Disc   Features: The disc is conical in shape, matching the sealing surface of the valve seat with a smaller contact area. Applications: Ideal for high-pressure conditions or systems requiring precise shutoff, such as steam and oil pipelines. Pros & Cons: Offers excellent sealing performance, but requires greater operating torque for opening and closing.     Plug / Concave Disc   Features: The disc surface is slightly convex, forming point contact with the valve seat, offering high sealing precision. Applications: Suitable for gases, liquids, and some corrosive media, allowing effective flow regulation.   Pros & Cons: Manufacturing cost is higher, but sealing performance and wear resistance are superior to flat discs.   Double Disc   Features: A large disc contains a smaller inner disc. Applications: Commonly used in high-pressure, large-diameter valves. It helps balance pressure and extend valve service life. Pros & Cons: Structurally more complex and more expensive, but ideal for high-pressure, large-diameter applications.     Conclusion     Globe valve discs come in a variety of types, each with unique advantages and suitable working conditions. When selecting a disc, consider the medium type, pressure, temperature, and flow requirements. Choosing the correct disc ensures reliable system sealing, extends valve life, and reduces maintenance costs.

If you have ever experienced project delays due to valve quality issues, or are in the process of selecting qualified valve suppliers for an upcoming industrial project, then understanding the essential inspection reports required when purchasing gate valves becomes critically important. As a key control component in piping systems, the quality of a valve directly affects the safety and reliability of equipment operation. Therefore, when purchasing gate valves, buyers should not only focus on price and delivery time but also ensure that the supplier can provide complete inspection reports.   Mandatory Inspection Reports   ● Material Test Report (MTR) Purpose: To verify that the main components of the valve, such as the body, bonnet, and stem, meet the specified material standards (e.g., ASTM, DIN, EN). Importance: Prevents valve failure under corrosive or high-pressure conditions due to substandard materials.   ● Pressure Test Report Hydrostatic Test: Checks the valve’s strength under the specified pressure. Air Tightness Test: Ensures the valve does not leak at operating pressure. Importance: Confirms that the valve meets the required design pressure rating.   ● Dimension Inspection Report Content: Verifies whether valve structural length, flange dimensions, wall thickness, etc., comply with design and standards (ANSI, EN, GB). Importance: Ensures proper alignment with the piping system and prevents installation deviations.   ● Non-Destructive Test (NDT) Report Methods: Includes Ultrasonic Testing (UT), Radiographic Testing (RT), Magnetic Particle Testing (MT), and Penetrant Testing (PT). Importance: Verifies that castings or welds are free from internal defects, enhancing the valve’s long-term operational reliability.   ● Coating & Painting Test Report Content: Checks paint thickness, adhesion, hardness, salt spray resistance, etc. Importance: Ensures the valve has strong corrosion resistance for outdoor, marine, or chemical environments.   ● Final Inspection Report Content: Includes comprehensive records of appearance, operational performance, markings, packaging, and other inspection items. Importance: Demonstrates that the valve has undergone strict quality control before delivery.   Conclusion   When purchasing gate valves, requiring suppliers to provide complete inspection reports is not only a verification of product quality but also a guarantee of overall project safety and reliability. By reviewing these reports, customers can reduce operational risks, lower maintenance costs, and extend the service life of their equipment.   Q&A   Q1: Why is a Material Test Report (MTR) mandatory when purchasing gate valves? A1: Material determines the valve’s pressure resistance, corrosion resistance, and service life. Different operating conditions require specific materials, so an MTR is necessary to verify compliance.   Q2: Is Non-Destructive Testing (NDT) require...

Stainless Steel Flanged Ball Valve is a commonly used industrial valve. Its closure element (the ball) is driven by the valve stem and rotates around the axis of the ball valve, thereby enabling the opening and closing of the pipeline as well as fluid control. In addition to simple on/off functions, stainless steel flanged ball valves can also be used for fluid regulation. In particular, hard-sealed V-port ball valves, relying on the strong shearing force between the V-shaped ball core and the hard alloy-welded seat, are especially suitable for media containing fibers or fine solid particles.   In industrial applications, multi-port stainless steel flanged ball valves can flexibly achieve medium merging, diversion, and flow switching, while also being able to shut off any single passage to ensure normal operation of the remaining pipelines.  these valves generally require horizontal installation to maintain long-term stable performance. According to the driving method, stainless steel flanged ball valves can be classified into manual, pneumatic, and electric types, meeting the needs of different operating conditions.     Standards for Stainless Steel Flanged Ball Valves   To ensure reliable performance and consistent quality, stainless steel flanged ball valves comply with the following standards: • Design and Manufacturing: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357; • Flange Dimensions: JB/T74–90, GB9112–9131, ANSI B16.5, JIS B2212–2214, DIN2543,EN1092; • Face-to-Face Dimensions: GB12221-89, ANSI B16.10, JIS B2002, DIN3202,EN558; • Inspection and Testing: JB/T 9092, API 598,API6D. These standards not only guarantee the interchangeability and compatibility of the valves but also ensure their safety and reliability in various industrial environments.     Models and Specifications of Stainless Steel Flanged Ball Valves   Common models and parameters of stainless steel flanged ball valves include: Electric Flanged Ball Valve Q941F: Size DN15–200, Pressure 0.6–10 MPa, Material: Cast Steel / Stainless Steel Carbon Steel ANSI Ball Valve Q41F: Size DN15–200, Pressure 150LB–900LB, Material: Carbon Steel / Cast Steel ANSI Stainless Steel Ball Valve Q41F: Size DN15–200, Pressure 150LB–900LB, Material: Stainless Steel Worm Gear Flanged Ball Valve Q341F: Size DN15–200, Pressure 0.6–6.4 MPa, Material: Carbon Steel / Stainless Steel Pneumatic Stainless Steel Ball Valve Q641F: Size DN15–200, Pressure 0.6–6.4 MPa, Material: Stainless Steel     Main Features of Stainless Steel Flanged Ball Valves   •  Excellent Wear Resistance: The core of the hard-sealed ball valve is overlaid with alloy steel, and the valve seat is surfaced with alloy steel, ensuring strong wear resistance. • Reliable Sealing Performance: Precision grinding guarantees a perfect fit between the ball and the seat, prev...

In pipeline systems, the Shutdown Valve is a key component for ensuring safe and efficient operation. Especially when handling high-pressure, high-temperature, flammable, or toxic media, the globe valve, as a common type of Shutdown Valve, plays a critical role. Compared to other types of valves, the structure and working principle of the globe valve make it one of the preferred choices for efficient and safe pipeline control.     1.Basic Function of the Shutdown Valve   In pipeline systems, the Shutdown Valve is a key component for ensuring safe and efficient operation. Especially when handling high-pressure, high-temperature, flammable, or toxic media, the globe valve, as a common type of Shutdown Valve, plays a critical role. Compared to other types of valves, the structure and working principle of the globe valve make it one of the preferred choices for efficient and safe pipeline control.     2.Role of the Shutdown Valve in Safety   Shutdown Valves play a critical safety role in many industrial applications, especially in pipeline systems that handle high-risk, flammable, or toxic media. The superior performance of the Shutdown Valve makes it an ideal choice for preventing dangerous leaks. For example, in the transportation of oil, natural gas, chemicals, and other hazardous substances, the Shutdown Valve can efficiently and quickly close the pipeline flow, preventing harm to the environment and personnel safety. Additionally, Shutdown Valves are widely used in steam systems, cooling water systems, and high-pressure gas pipelines. In these applications, the Shutdown Valve not only ensures safe operation but also effectively regulates flow, controls pipeline pressure, and prevents both overpressure and underpressure in the system, thereby maintaining the stability of the pipeline system.     3.Impact of the Shutdown Valve on Efficient Operation   The Shutdown Valve, known for its reliable sealing performance and low flow resistance, is a crucial tool for achieving efficient flow control in pipeline systems. Compared to other valve types, the design of the Shutdown Valve focuses not only on ensuring a tight shutoff but also on its flow regulation capabilities. While it is not specifically designed for flow control, in certain cases, the Shutdown Valve can serve a limited flow regulation function, especially in systems with relatively low flow rates. For optimal operation, the Shutdown Valve requires regular inspection and maintenance to ensure its sealing integrity and functionality. In high-pressure or high-temperature environments, the valve's sealing surfaces are vulnerable to erosion or damage. Therefore, proper maintenance measures are essential to extend the valve's service life and ensure the safe and efficient operation of the system.     4. Selection and Application of the Shutdown Valve   When selecting the appropriate Shutdown Valve, several factors should be considered: Me...