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China Dual Plate Wafer Type Check Valve - Reliable Suppliers and Factory for HVAC, Water Supply, and More
📋 Description
Dual Plate Wafer Check Valve is a compact and efficient solution for preventing backflow in water, gas, oil, and other fluid systems. Designed with two spring-loaded plates, this valve offers quick response and minimal pressure loss, making it ideal for space-constrained pipelines.
The dual plate wafer check valve operates automatically when fluid flows in the forward direction, with the plates opening under pressure. When flow stops or reverses, the springs quickly push the plates closed, providing a tight seal that protects pumps, compressors, and upstream equipment.
Manufactured from cast iron, stainless steel, or carbon steel, this valve is corrosion-resistant and built for long service life. The wafer-style body allows for installation between standard flanges, making it easy to integrate into existing systems without major modifications.
Thanks to its lightweight and low-profile design, the dual plate wafer check valve is often used in HVAC, water treatment, petrochemical, and marine applications. It meets international standards such as API 594 and EN 12334 and is pressure-tested before delivery.
Whether you're designing a new system or replacing older, bulky swing check valves, the dual plate wafer check valve offers superior performance in a compact form factor.
The dual plate wafer check valve operates automatically when fluid flows in the forward direction, with the plates opening under pressure. When flow stops or reverses, the springs quickly push the plates closed, providing a tight seal that protects pumps, compressors, and upstream equipment.
Manufactured from cast iron, stainless steel, or carbon steel, this valve is corrosion-resistant and built for long service life. The wafer-style body allows for installation between standard flanges, making it easy to integrate into existing systems without major modifications.
Thanks to its lightweight and low-profile design, the dual plate wafer check valve is often used in HVAC, water treatment, petrochemical, and marine applications. It meets international standards such as API 594 and EN 12334 and is pressure-tested before delivery.
Whether you're designing a new system or replacing older, bulky swing check valves, the dual plate wafer check valve offers superior performance in a compact form factor.
- Quick Response
- Minimal Pressure Loss
- Corrosion Resistant
- Compact Wafer Design
- API 594 Compliant
- Pressure Tested
⚙️ Specifications
| Nominal Pressure (MPa) | 1.0 | 1.6 | |
| Nominal Diameter (mm) | 50–800 | 50–800 | |
| Test Pressure (MPa) | Shell | 1.5 | 2.4 |
| Seal | 1.1 | 1.76 | |
| Applicable Temperature (°C) | 150 | ||
| Applicable Medium | Fresh water, Sewage, Sea water, Air, Vapor, Food, Medicine, Oils, Acids, Alkalis, etc. | ||
| Operating Mode | Manual, Worm Gear, Pneumatic, Electric, etc. | ||
📐 Standards
| Design & Manufacture | Flange Connection | Face to Face Dimension | Test & Inspection |
| API 594 | DIN PN10/16/25 | API 594 | API 598 |
🔩 Material
| Body | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Plate | Ductile Iron, Carbon Steel, Stainless Steel |
| Spring | Stainless Steel |
| Hinge Pin | Stainless Steel |
| Plug | Carbon Steel |
| Body Bearing | PTFE |
| Spring Bearing | PTFE |
| Stop Pin | Stainless Steel |
| Eye Bolt | Carbon Steel |
| Body Seat | NBR, EPDM, Viton, Neoprene |
📏 Dimensions (mm)
| SIZE (in) | DN | B | E | DIN PN10/16 | ANSI 150 | JIS 10K |
| 2 | 50 | 43 | 66 | 107 | 102 | 101 |
| 2-1/2 | 65 | 46 | 86 | 127 | 121 | 121 |
| 3 | 80 | 64 | 95 | 142 | 133 | 131 |
| 4 | 100 | 64 | 118 | 162 | 171 | 156 |
| 5 | 125 | 70 | 146 | 192 | 193 | 187 |
| 6 | 150 | 76 | 174 | 218 | 219 | 217 |
| 8 | 200 | 89 | 225 | 273 | 276 | 267 |
| 10 | 250 | 114 | 266 | 328 | 336 | 330 |
| 12 | 300 | 114 | 311 | 378/382 | 406 | 375 |
| 14 | 350 | 127 | 361 | 438/442 | 448 | 420 |
| 16 | 400 | 140 | 411 | 488/495 | 511 | 483 |
| 18 | 450 | 152 | 451 | 538/555 | 546 | 538 |
| 20 | 500 | 152 | 506 | 592/617 | 603 | 593 |
| 24 | 600 | 178 | 625 | 695/734 | 714 | 697 |
| 28 | 700 | 229 | 721 | 809 | 828 | 807 |
| 32 | 800 | 241 | 826 | 916 | 936 | 917 |
🖼️ More Details
❓ Frequently Asked Questions
Q What is a dual plate wafer check valve used for?
A dual plate wafer check valve is used to prevent backflow in pipelines carrying water, gas, oil, and various other fluids. It is commonly applied in HVAC systems, water treatment plants, petrochemical facilities, and marine applications to protect pumps, compressors, and upstream equipment from reverse flow damage.
Q What materials are available for the dual plate wafer check valve?
The valve body can be manufactured from Cast Iron, Ductile Iron, Carbon Steel, or Stainless Steel. The plates are available in Ductile Iron, Carbon Steel, or Stainless Steel. Springs and hinge pins are made from Stainless Steel, while the body seat options include NBR, EPDM, Viton, and Neoprene to suit different media and temperature conditions.
Q What pressure ratings does the dual plate wafer check valve support?
The dual plate wafer check valve is available in nominal pressure ratings of 1.0 MPa and 1.6 MPa. Shell test pressures are 1.5 MPa and 2.4 MPa respectively, and seal test pressures are 1.1 MPa and 1.76 MPa. It is suitable for nominal diameters ranging from DN50 to DN800 (2" to 32").
Q What international standards does this valve comply with?
The dual plate wafer check valve is designed and manufactured in accordance with API 594. Flange connections comply with DIN PN10/16/25 standards. Face-to-face dimensions follow API 594, and testing and inspection are carried out per API 598, ensuring reliable quality and global compatibility.
Q How is the dual plate wafer check valve installed?
The wafer-style body is designed to be installed between two standard flanges in a pipeline, requiring no additional space or major system modifications. This makes it easy to integrate into both new and existing piping systems. The compact, lightweight design simplifies handling and installation compared to traditional swing check valves.
Q What media is the dual plate wafer check valve compatible with?
This valve is compatible with a wide range of media including fresh water, sewage, sea water, air, vapor, food-grade liquids, medicines, oils, acids, and alkalis. The appropriate seat material (NBR, EPDM, Viton, or Neoprene) should be selected based on the specific medium and operating temperature to ensure optimal sealing performance.