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Help CenterCast Iron Dual Plate Check Valve for Marine Seawater Systems DN150 PN10 Wafer End Stainless Steel Disc EPDM
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Shanghai Zhibang Valve Manufacture Co., Ltd. brings you a robust and reliable Cast Iron Dual Plate Check Valve specifically engineered for demanding marine seawater systems. With over 8 years of manufacturing excellence since 2016 and an annual export value between US$1 million and US$1.5 million, our valve combines high-grade materials like a cast iron body, stainless steel disc, and EPDM seat to deliver superior corrosion resistance and long service life in seawater environments. The DN150 PN10 wafer end design ensures easy installation and space-saving integration into your piping system.
This dual plate check valve is designed to prevent backflow effectively while minimizing pressure drop and water hammer. Its compact wafer style allows it to be sandwiched between pipe flanges, reducing overall system weight and footprint. Whether you are retrofitting existing vessels or building new offshore platforms, this valve offers a cost-effective and dependable solution for controlling flow direction in seawater lines.
Key Features & Technical Specifications
- Durable Cast Iron Body – High-strength cast iron provides excellent structural integrity and resistance to seawater corrosion with proper coating.
- Stainless Steel Disc – 304 or 316 stainless steel disc offers superior corrosion resistance and wear performance in saline environments.
- EPDM Seat & O-Rings – EPDM rubber is resistant to ozone, UV, and many chemicals, making it ideal for marine applications.
- Wafer End Connection – Slim profile for installation between flanges per EN 1092-2 or ASME B16.5 (available upon request).
- Low Pressure Drop – Dual plate design allows flow to pass with minimal resistance, reducing energy consumption.
- Non-Slam Operation – Spring-assisted closure prevents water hammer and protects downstream equipment.
- Vertical or Horizontal Installation – Can be installed in any orientation, offering flexibility in piping layouts.
- ISO9001 Certified – Manufactured under strict quality control processes ensuring consistent performance.
| Parameter | Value |
|---|---|
| Nominal Diameter | DN150 (6 inches) |
| Pressure Rating | PN10 (10 bar / 145 psi) |
| Face-to-Face Dimension | Per EN 558 Series 48 (or customizable) |
| Test Pressure: Shell | 1.5 x PN (15 bar) |
| Test Pressure: Seat | 1.1 x PN (11 bar) |
| Temperature Range | -10°C to +80°C (EPDM dependent) |
| Applicable Media | Seawater, fresh water, cooling water, brine |
Our dual plate check valve is engineered for easy maintenance. The spring-loaded plates close quickly when flow reverses, ensuring no water hammer. The stainless steel disc and EPDM seat combination provides excellent sealing even after prolonged exposure to seawater. Each valve is individually hydrostatically tested before leaving our factory to guarantee zero leakage.
Advantages for Marine Applications
- Corrosion Resistance – Cast iron body with epoxy coating (optional) and stainless steel internals withstand saline environments.
- Compact Design – Wafer style saves space and reduces weight compared to swing check valves.
- Low Maintenance – Few moving parts and robust materials reduce the need for frequent servicing.
- Versatile Installation – Suitable for both horizontal and vertical pipelines with upward flow.
- Cost-Effective – Competitive pricing without compromising on quality, backed by our ISO9001 system.
Shanghai Zhibang Valve Manufacture Co., Ltd. has been serving clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, and beyond. Our factory in Shanghai, China, ships worldwide via ports like Shanghai, Guangzhou, Hong Kong, and Beijing. With an annual export revenue of US$1–1.5 million, we are a trusted partner for OEMs, distributors, and end-users in the marine industry.
Why Choose Our Cast Iron Dual Plate Check Valve?
- Over 8 years of valve manufacturing experience.
- ISO9001 certified quality management system.
- Customizable disc materials (SS316, Duplex, Super Duplex) available upon request.
- Prompt delivery and professional after-sales support.
- Competitive factory-direct pricing.
We invite you to contact us for technical specifications, quotations, or sample orders. Our experienced team is ready to assist you with choosing the right check valve for your marine seawater system. Trust Shanghai Zhibang Valve – your reliable partner in fluid control.
Frequently Asked Questions (FAQ)
-
Q: Is this valve suitable for continuous seawater exposure?
A: Yes, the cast iron body is protected with anti-corrosion coating, and the stainless steel disc and EPDM seat are specifically chosen for seawater resistance. For extremely corrosive environments, we recommend upgrading to super duplex disc material. -
Q: Can this valve be installed vertically?
A: Yes, the dual plate check valve can be installed both horizontally and vertically. However, for vertical installation with upward flow, the spring ensures the plates close properly when flow stops. -
Q: What is the difference between a dual plate check valve and a swing check valve?
A: Dual plate check valves are more compact, lighter, and produce less water hammer due to faster closing. They are ideal for space-constrained and high-flow applications like marine systems. -
Q: What pressure ratings are available besides PN10?
A: We also offer PN16, PN25, and Class 150/300 ratings. Please specify your requirement when ordering. -
Q: Does the valve come with flange gaskets and bolts?
A: Typically, the valve itself is supplied without flange hardware. Gaskets and bolts can be provided as optional accessories upon request. -
Q: What is the typical lead time for DN150 PN10 wafer check valves?
A: Standard lead time is 15–25 working days after order confirmation, depending on quantity and customization. -
Q: How do you ensure the quality of the valve?
A: We follow ISO9001 procedures, including 100% hydrostatic shell and seat testing, material traceability, and visual inspection before shipment. A test certificate is provided with each batch. -
Q: Can I get a sample for testing?
A: Yes, sample orders are welcome. Please contact our sales team for sample pricing and lead time.
Shanghai Zhibang Valve Manufacture Co., Ltd. – Delivering Flow Control Solutions Since 2016. Contact us today for a quote!
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