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Help CenterDual Plate Wafer Check Valve With Spring Loaded Disc for High Pressure Systems
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Shanghai Sote Valve Co., Ltd., a professional valve manufacturer based in Shanghai, China, presents its high-performance Dual Plate Wafer Check Valve. Engineered for HVAC, fire protection, and industrial piping systems, this valve minimizes pressure drop while ensuring reliable backflow prevention. Its compact design reduces installation space requirements by up to 70% compared to traditional swing check valves, making it ideal for retrofit projects. With zero-leakage performance and maintenance-free operation, our valve delivers long-term cost savings and system reliability.
The dual-plate design features two spring-assisted discs that open with minimal flow pressure (as low as 0.15 psi) and close instantly upon flow reversal. Key technical specifications include:
| Feature | Specification |
|---|---|
| Body Material | Ductile Iron (GGG40) / Stainless Steel (SS304/SS316) |
| Disc Material | Stainless Steel with NBR/EPDM/FKM Seals |
| Pressure Rating | PN10/PN16 (EN 1092) | ANSI 150 (ASME B16.34) |
| Temperature Range | -20°C to 120°C (Standard Seals) | Customizable |
| Face-to-Face | Complies with EN 558 Series 20 | API 594 |
Performance Advantages:
Reduced water hammer effect through controlled disc closure mechanism
80% lower pressure loss than swing check valves (tested per AWWA C508)
Bi-directional sealing capability prevents backflow in vertical/horizontal pipes
Corrosion-resistant components ensure 10+ year service life in harsh environments
No lubrication required with maintenance-free polymer bearings
Installation flexibility is enhanced through multiple configuration options:
Standard wafer design for flange mounting between ANSI/EN flanges
Lug-type version available for end-of-line service (upon request)
Optional epoxy coating (250μm) for corrosive environments
Shanghai Sote Valve has supplied over 500,000 check valves to global HVAC and fire protection projects since 2010. Our dual plate valve undergoes rigorous quality control including:
100% hydrostatic shell testing at 1.5x rated pressure
Air leakage testing under 0.6 bar pressure differential
Cyclic endurance testing (10,000+ open/close cycles)
Contact our Shanghai-based engineering team today for customized solutions. We offer flexible MOQs and fast delivery for standard sizes, backed by a 3-year warranty against manufacturing defects. Request your free flow resistance calculation report to quantify energy savings in your specific application.
Frequently Asked Questions:
Q1: Can this valve be installed in vertical upward flow applications?
A: Yes, the spring-assisted design ensures reliable closure in vertical upward flow orientations. Minimum flow velocity requirements apply - consult our technical datasheet.
Q2: What maintenance is required?
A: Our valves are designed for zero maintenance. The encapsulated stainless steel springs and polymer bearings eliminate lubrication needs. Visual inspection during system maintenance is recommended.
Q3: Are your valves compatible with fire protection standards?
A: Yes, they meet NFPA 13/14 requirements for check valves in sprinkler systems. Optional UL/FM certifications are available upon request.
Q4: What is the delivery time for DN200 valves?
A: Standard DN200 sizes ship within 15 working days. Express production options can reduce lead time to 7 days for urgent projects.
Q5: Can I get special end connections?
A: We offer customizations including grooved ends (for AWWA systems), RTJ faces, and extended body lengths. Submit your connection specifications for engineering review.
Q6: How does the low pressure drop benefit HVAC systems?
A: Reduced pressure loss translates directly to lower pump energy consumption. Our valves typically decrease system energy usage by 5-15% compared to conventional check valves.
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