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Help CenterCast Steel Marine Wafer Dual Plate Check Valve DN50-DN600 PN1.0-4.0MPa Spring Loaded
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As a professional manufacturer from Shanghai Zhibang Valve Manufacture Co., Ltd., we are proud to introduce our Cast Steel Marine Wafer Dual Plate Check Valve – a high-performance solution designed to prevent backflow in piping systems with minimal pressure loss. With over 8 years of manufacturing experience and an annual export value exceeding US$1 million, our valve is engineered for durability in demanding marine and industrial environments. This spring-loaded, dual-plate design offers rapid response and compact installation between flanges, making it a trusted choice for clients across North America, Europe, Southeast Asia, and the Middle East.
Our valve features a robust cast steel body that withstands harsh conditions, while the dual plates and springs ensure tight sealing and quick closure. The wafer-style body reduces weight and simplifies installation between ANSI, DIN, or JIS flanges. Whether you need to handle water, oil, gas, or seawater, this check valve delivers reliable performance under pressure ratings from PN1.0 to PN4.0 MPa and sizes from DN50 to DN600.
Key Features & Benefits
- Dual Plate Design: Two lightweight plates reduce closure time and minimize water hammer compared to single-plate or swing check valves.
- Spring-Loaded Mechanism: Assists rapid closing at zero flow, preventing reverse flow before it starts – ideal for vertical or horizontal installations.
- Cast Steel Body: High strength-to-weight ratio and excellent corrosion resistance in marine atmospheres (optional stainless steel internals available).
- Compact Wafer Style: Short face-to-face dimension saves space and reduces overall system weight.
- Broad Size & Pressure Range: DN50 to DN600 with PN1.0–4.0MPa, covering most medium-pressure applications.
- Low Pressure Drop: Streamlined flow path reduces head loss, improving system efficiency.
- Easy Maintenance: Replaceable seat and spring assemblies simplify field servicing.
Technical Specifications
| Parameter | Value |
|---|---|
| Body Material | Cast Steel (WCB, WCC, or LCB optional) |
| Trim Material | Stainless Steel 304/316 (standard) |
| Seat Material | PTFE, Nitrile, or Viton (customer choice) |
| Spring Material | Stainless Steel 301/316 |
| Pressure Range | PN1.0 – PN4.0 MPa (Class 150 – 300 equivalent) |
| Size Range | DN50 – DN600 (2" – 24") |
| Flange Standard | ANSI B16.5, DIN EN 1092, JIS B2220 |
| Operating Temperature | -20°C to +350°C (depending on seat material) |
| Installation Position | Horizontal or vertical (upward flow) |
The dual plate check valve is designed for long service life with minimal maintenance. Each valve undergoes rigorous testing – including shell test, seat leakage test, and functional test – in our ISO9001-certified facility. Typical applications include marine ballast systems, offshore platforms, desalination plants, water treatment, and general industrial pipelines where non-return is critical.
Why Choose Shanghai Zhibang Valve?
Since our establishment in 2016, we have grown into a reliable valve exporter with annual export revenue between US$1 million and US$1.5 million. We serve markets across six continents, including North America, Europe, South America, Africa, and Asia. Our valves are manufactured under strict ISO9001 quality management, ensuring consistent performance. We offer flexible shipping options from Shanghai, Guangzhou, Hong Kong, or Beijing – whichever is most convenient for you. With a dedicated team and a wide range of sizes and materials, we can customize the valve to meet your specific requirements. Contact us today for a quotation or technical consultation – we are committed to delivering superior products and responsive support.
Frequently Asked Questions
-
What is the main application of this check valve?
It is primarily used in marine and industrial systems to prevent backflow of water, oil, gas, or seawater, especially in limited-space installations where a compact wafer body is beneficial. -
Can this valve be installed vertically?
Yes, the spring-loaded design allows vertical installation with upward flow. For downward flow, please consult our technical team for special spring settings. -
What materials are available for the seat and seals?
Standard seat is PTFE; optional Nitrile (NBR) for oil applications and Viton (FKM) for high-temperature or chemical resistance. -
What is the maximum working temperature?
Up to 350°C depending on seat material. PTFE is suitable up to 200°C, while metal seats (optional) can handle higher temperatures. -
Do you provide a warranty?
Yes, we offer a standard 12-month warranty from shipment date against manufacturing defects. Extended warranty is available upon request. -
How long is the typical lead time?
For standard sizes (DN50–DN300), lead time is 15–30 days. Larger sizes or custom materials may require 30–45 days. We can expedite for urgent orders. -
Is this valve suitable for seawater services?
Yes, with cast steel body and stainless steel trim, it performs well in seawater. We recommend selecting Viton seals and optionally upgrading the body to duplex stainless steel for extreme corrosive environments. -
What certifications do your products have?
Our entire manufacturing process is ISO9001 certified. Specific product certifications (such as API or CE) can be provided upon request for an additional cost, depending on the target market.
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