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.
2" 800LB Swing Check Valve is made according to API 602 standard. The valve body is made of ASTM A105N. It has the structural characteristics of Bolted Bonnet, Swing Type. Its connection mode is FNPT.
Payment:
30% when order confirmed, 70% before shipmentProduct Origin:
chinaColor:
CustomizationShipping Port:
Shanghai, ChinaLead Time:
30~60 days Ex Works after order confirmationMaterial:
ASTM A105NMethod of Operation:
H.W.
|
Type |
Swing Check Valve |
|
Size |
2” |
|
Pressure |
800LB |
|
Connection |
FNPT |
|
Body Material |
ASTM A105N |
|
Design Norm |
API 602 |
|
Face to Face |
Manufacturer's Std |
|
Flange Ends |
ANSI B1.20.1 |
|
Test & Inspection Code |
API STD.598 |
|
Temperature |
-29 ~ 425°C |
|
Applicable Medium |
Water, Oil and Steam |
1. Forged A105N body provides high strength and durability under demanding pressure conditions.
2. Swing check design with FNPT ends ensures reliable backflow prevention and easy pipeline connection.
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The 8 inch non return check valve conforms to BS 1868 design code, with bolted bonnet and swing type disc. The flanged check valve is made of carbon steel A216 WCB. Design Feature 1.BB: bolted bonnet 2.Swing type disc 3.Reduced bore design 4.Superior flow rates 5.Minimized friction loss 6.Standard trim material for selection 7.External or internal hinge pin available on request 8.Cylinder and counter weight available on request 9.Bare stem and actuators are available on request Quick Detail Type Check Valve Size 8'' Design Pressure ANSI 1500 Construction Bolted Bonnet, Swing Type Connection Raised Face Flange Design & Manufacture BS 1868 End to End ASME B16.10 Connection ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material Carbon Steel Applicable Temp -29℃~+400℃ Media W.O.G. Dimension Class 1500 NPS in 2 2 1/2 3 4 6 8 10 12 DN mm 50 65 80 100 150 200 250 300 L-L1 (RF-BW) in 14-1/2 16-1/2 18-1/2 21-1/2 27-3/4 32-3/4 39 44-1/2 mm 368 419 470 546 705 832 991 1130 L2 (RTJ) in 14-5/8 16-5/8 18-5/8 21-5/8 28 33-1/8 39-3/8 45-1/8 mm 371 422 473 549 700 841 1000 1146 H (OPEN) in 12-1/4 12-1/4 13 14 15-3/4 20-7/8 22-1/16 25-5/8 mm 310 310 330 355 400 530 560 650 WT (kg) RF 69 93 140 232 490 990 1490 1970 BW 49 74 111 185 375 803 1250 1625
The swing type check valve, designed with PN40 RF flange, bolted cover, is made of cast steel 1.0619 and ss316 trim material. The full bore check valve can be manufactured per client's special requests. Quick Detail Type Non Return Valve ( Check Valve) Nominal Size DN 150 NominalPressure PN 40 Construction BB, Swing Type Disc, Exnternal Pin Connection Raised Face Flange Design & Manufacture DIN 3356 End to End EN 558 Connection EN 1092 Test & Inspection EN 12266 Body Material GS-C25 (1.0619) ApplicableTemp -29℃~+425℃ Media W.O.G. Material No Part Name Carbon steel to ASTM Alloy steel to ASTM Stainless steel to ASTM WCB LCB WC6 WC9 C5 CF8 CF8M CF3 CF3M 1 Body A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 2 Seat Ring A105 A350 LF2 A182 F11 A182 F22 A182 F5 A182 F304 A182 F316 A182 F304L A182 F316L 3 Disc nut A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 4 Disc washer A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 5 Disc A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 6 Hinge A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 7 Hinge pin A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 8 Yoke A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 9 Bonnet nut A194 2H A194 4 A194 7 A194 8 10 Bonnet bolt A193 B7 A193 L7 A193 B16 A193 B8 11 Gasket Stainless Steel Spiral Wound graphite or Stainless Steel Spiral Wound PTFE 12 Cover A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 13 Hook screw Steel 14 Name Plate Stainless steel or Aluminum 15 Rivet Stainless steel or Aluminum Other Material ( Alloy 20, ANSI 321, Monel Hastelloy, etc)are available on request Our Service A good customer service is as valuable as product itself. In Dervos, we will offer a full range of customer service to make you feel easy when doing business with us. Providing weekly production report When production begins, you will get production report weekly, so that you can have good command of product status and report to your customer at the meantime. Offering warranty of 18 months 18 months warranty period will be offered after shipment, no concern to purchase valve from Dervos. Providing solutions within 3-days for complaints All the complaints will be solved within 3 days, in this case, you can timely reply and solve problems for your customer, to relax them even when complaints happening.
The stainless steel CF8 non return valve features in non slam type disc, ANSI 150 flange end, and full port design. Quick Detail Type Non Return Valve ( Check Valve) Size 8'' DesignPressure Class 150 Construction Non Slam Type Connection RF Flange Design & Manufacture ASME B16.34 End to End ASME B16.10 Connection ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material A351 CF8 Trim Material SS304 Media W.O.G. Available Modifications for Dervos Valves -Valve Pressure -Valve Size -Reduced Bore & Full Bore -Body & Trim Material (Disc, Seat, Pin, Spring) -End Connection (Flange, BW, SW, Thread, Wafer, Lug) -Available Operation (Bare Stem, With Actuators) -Available Counterweight -Available Cylinder -Customizing Coating -Customizing Packaging Related Knowledge What is non-slam check valve? Water hammer is a hydraulic phenomenon that undergoes an abrupt change in its rate of flow and are caused by sudden shutting or slamming. Water hammer will reduce process efficiency, cause valve damage, gasket joint leaks and other problems. The non-slam check valve is designed to reduce water hammer. An internal spring can prevent the disc from slamming close.The design of a non-slam check valve could eliminate pressure flutuations, vibration and damges. Plus, the disc and spring experience minimal wear over time, which will largely extend the service lives of non-slam check compared to swing check valve.
API6D swing type check valve RF connnection bolted bonnet full pore WCB body, WCB+13Cr disc, A105+13Cr seat ring, WCB hinge. Suitable temperature in -29℃~+425℃ Quick Detail Type Swing Check Valve Size 4 inch-6 inch Design Pressure CL600 Construction BC, Swing type ConnectionType Flange OperationType - Body Material WCB DiscMaterial WCB+13Cr Hinge Material WCB Seat Material A105+13Cr Design Code API 6D Face to Face Dimension ASME B16.10 Test and Inspect API 598 Pressure & Temp ASME B16.34 Medium Water, Oil and Gas Origin China
Chinese manufacturer Dervos offers 14 Inch swing check valves made according to API 6D. Other features cover CL300, RF End Connection, WCB body.
The swing check valve is made of A216, a kind of WCB. Manufactured according to BS1868, the check valve is 6 inch and 150LB. And the valve is capable in working temperature between -19 to 425 degree Celsius.
The swing check valve is made of 1.0619, a kind of carbon steel, as per DIN standard.The check valve is DN80 and PN40, or 3 inch and 300LB. And the valve is capable in working temperature between -19 to 425 degree Celsius.
The 1 inch swing check valve has the construction of bolted bonnet and RF flange end. The forged steel swing check valve is designed with reduced bore as per API 602. Dervos could also do customizing service as per clients’ requests on sizes, design ratings, materials, and standards and so on.
Made of high-quality casting, the DIN swing check valve has a cast steel body with bolted bonnet structure and flange connection. The valve is designed with good sealing performance and minimal water hammer effect.
DN400 PN10 check valve is made according to DIN standard. The valve body is made of WCB. It has the structural characteristics of swing type and structural length of 310mm. It has the connection mode of RF. This valve has a built-in damper, which is mainly used for shock absorption and energy dissipation.
6" 1500LB swing check valve is made according to API 6D standard. The valve body is made of WCB. It has the structural characteristics of swing type. It has BW connection mode.
1" 150LB swing check valve is made according to API 602 standard. The valve body is made of A105. It has the structural characteristics of bolt cover, swing type and full bore. Its connection mode is RF (Welded Flange).
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