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Help CenterReliable Marine Dual Plate Check Valve for Compressed Air, Cast Iron Body, Rubber Seal, DN50-DN200, Wafer Factory Direct With Technical Support
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, is a professional manufacturer specializing in valve solutions for marine and industrial applications. Our Reliable Marine Dual Plate Check Valve is engineered to deliver superior performance in compressed air systems, featuring a robust cast iron body and durable rubber seal. As a factory-direct supplier with annual export value exceeding US$1 million, we provide technical support and customized services to meet your specific requirements.
This wafer-type check valve is designed to prevent backflow in horizontal or vertical pipelines, ensuring system safety and efficiency. Suitable for DN50 to DN200 (2"–8") pipe sizes, it offers a compact structure, low pressure drop, and easy installation between flanges. Ideal for marine, shipbuilding, and industrial compressed air systems, this valve combines reliability with cost-effectiveness.
Key Features & Technical Specifications
- Durable Construction: Cast iron body (GG25/GGG40) with corrosion-resistant coating; rubber seal options include NBR, EPDM, or Viton for diverse media compatibility.
- Compact Wafer Design: Short face-to-face dimension saves space and reduces weight; suitable for tight installation environments.
- Low Pressure Drop: Streamlined dual plate design minimizes turbulence and energy loss, ideal for compressed air systems.
- Reliable Backflow Prevention: Spring-assisted closure ensures tight sealing even at low flow rates; non-slam operation reduces water hammer.
- Wide Application Range: Works with compressed air, water, seawater, oil, and gas; temperature range -10°C to +80°C (customizable).
- Easy Maintenance: Simple structure with fewer moving parts; replacement of seal and spring is straightforward.
- Factory Direct Support: Technical assistance available for selection, installation, and troubleshooting; drawings and certifications provided upon request.
| Parameter | Specification |
| Size Range | DN50 – DN200 (2" – 8") |
| Body Material | Cast Iron (Ductile Iron optional) |
| Seal Material | NBR / EPDM / Viton (optional) |
| Working Pressure | PN10 / PN16 (higher available on request) |
| Working Temperature | -10°C to +80°C (customizable) |
| Connection | Wafer type between flanges (ANSI/DIN/BS) |
| Standards | ISO9001, API 594 (optional) |
Our dual plate check valve is extensively tested for leakage and pressure performance. The rubber seal provides excellent tightness against backflow, while the cast iron body offers strength and durability for demanding marine environments. Customers benefit from reduced maintenance downtime, lower energy consumption, and extended service life compared to conventional swing check valves.
As a factory with ISO9001 certification and exports to North America, South America, Europe, Asia, Africa, and Oceania, Shanghai Zhibang Valve ensures consistent quality and on-time delivery. We ship from ports including Shanghai, Guangzhou, Hong Kong, and Beijing. With annual export value between US$1 million and US$1.5 million, we have proven our capability to serve global clients.
Contact us today for competitive pricing, technical data sheets, and custom solutions. Our experienced team is ready to support your marine and industrial projects.
Frequently Asked Questions (FAQ)
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Q: Is this valve suitable for vertical installation?
A: Yes, our dual plate check valve can be installed in both horizontal and vertical pipelines (upward flow). Please specify your orientation when ordering to confirm spring tension. -
Q: What rubber seal options are available for compressed air?
A: For compressed air, we recommend NBR (nitrile) as it offers good resistance to oil carryover. EPDM is also available for oil-free air systems. Please consult our technical support for your specific medium. -
Q: Can I get a custom size outside DN50-DN200?
A: While standard production covers DN50 to DN200, we can manufacture other sizes upon request with suitable lead time. Contact us for feasibility. -
Q: What is the maximum working pressure for this valve?
A: Standard working pressure is PN16 (16 bar). Higher pressure ratings, such as PN25 or PN40, are available with reinforced body design. Please provide your system parameters. -
Q: Do you provide test certificates or material certificates?
A: Yes, we provide ISO9001 certificates, hydrostatic test reports, and material certificates as needed. Third-party inspection is also welcome. -
Q: How long is the warranty period?
A: Standard warranty is 12 months from shipment date. Extended warranty options can be arranged for bulk orders. -
Q: What is the lead time for standard sizes?
A: For DN50-DN200 with common materials, lead time is typically 15-30 working days. Custom orders may require 30-45 days. -
Q: Can I get samples for testing?
A: Yes, sample orders are welcomed. Sample cost and freight are negotiable. We can also offer technical drawings and simulation data for your evaluation.
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