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Help CenterWafer Type Marine Dual Plate Check Valve Cast Iron Body DN80 PN16 Rated Stainless Steel Disc EPDM Seal RINA Certified
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 with an annual export value exceeding US$1 million, proudly presents our premium Wafer Type Marine Dual Plate Check Valve. Engineered specifically for demanding marine and industrial environments, this valve combines a durable cast iron body with a stainless steel disc and EPDM seal, ensuring reliable non-return performance under PN16 rated pressure. Backed by our ISO9001 quality management system and RINA type approval, this check valve is a trusted choice for shipbuilding, offshore platforms, and water treatment systems worldwide.
Our dual plate design minimizes pressure drop and allows for quick closure, preventing backflow effectively. The wafer-style installation saves space and reduces weight compared to traditional swing check valves. With extensive export experience to North America, Europe, Southeast Asia, and the Middle East, we ensure each valve meets international standards. Below you will find detailed specifications and benefits that make this product a reliable solution for your piping system.
Key Features & Technical Specifications
- Body Material: Cast Iron (GG25) – excellent corrosion resistance in marine atmospheres.
- Disc Material: Stainless Steel (SS304/SS316 available upon request) – high strength and wear resistance.
- Seal Material: EPDM – suitable for fresh/salt water, treated effluents, and mild chemicals.
- Size Range: DN80 (3 inch) – other sizes from DN50 to DN600 are customizable.
- Pressure Rating: PN16 (16 bar) – also available in PN10/PN25/Class150 upon request.
- Operation: Automatic check, dual plate spring-assisted closure.
- Certification: RINA type approval, ISO9001 certified manufacturing facility.
- Temperature Range: -10°C to 80°C (standard EPDM); optional Viton seal for higher temperatures.
| Parameter | Specification |
| Nominal Diameter | DN80 (3") |
| Pressure Rating | PN16 |
| Body Material | Cast Iron (GG25) |
| Disc Material | Stainless Steel (SS304) |
| Seal Material | EPDM |
| Face-to-Face Length | 60 mm (per EN 558) |
| Weight | Approx. 7.5 kg |
| Flange Drilling | EN 1092-2 (PN16) |
Application Benefits
This wafer dual plate check valve is ideal for marine ballast systems, cooling water lines, fire-fighting water mains, and general industrial pipelines where backflow prevention is critical. Its compact design reduces installation space and overall system cost. The low-pressure drop characteristic of dual plates ensures energy efficiency, while the corrosion-resistant materials extend service life even in harsh saltwater environments.
For maintenance, the simple wafer design allows quick removal and replacement without disturbing the piping. The EPDM seal provides excellent resilience and tight sealing against low-pressure backflow. With RINA certification, shipyards and offshore operators can confidently use this valve in classed systems.
Trust & Reliability
Shanghai Zhibang Valve Manufacture Co., Ltd. has been supplying high-quality valves to global markets since 2016. Our annual export value of US$1–1.5 million reflects our commitment to consistent quality. We serve customers across North America, South America, Europe, Africa, Oceania, and Asia, with flexible shipping from Shanghai, Guangzhou, Hong Kong, and Beijing. Our ISO9001-certified production process ensures every valve meets rigorous quality checks. Choose our wafer check valve for a reliable, cost-effective solution that complies with international marine standards.
Contact us today for competitive pricing and technical support. We offer customization options such as different disc materials (SS316, Duplex), alternative seals (NBR, Viton), and special coatings for aggressive environments. Let us help you optimize your pipeline system with a valve that delivers performance you can trust.
Frequently Asked Questions
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Q: What does RINA certification mean for this valve?
A: RINA (Registro Italiano Navale) is an international classification society. This certification confirms our valve meets stringent requirements for marine applications, including material traceability, testing, and design approval. -
Q: Can this valve be used for seawater?
A: Yes, the cast iron body with stainless steel disc and EPDM seal is suitable for seawater applications provided proper cathodic protection is considered. We also offer optional coating for enhanced resistance. -
Q: Is the valve bidirectional?
A: No, check valves are unidirectional. The flow direction is indicated by an arrow on the body. Reverse flow will cause the plates to close. -
Q: What is the maximum working pressure?
A: For DN80 PN16, the maximum allowable working pressure is 16 bar (232 psi) at ambient temperature. Higher pressures require selection of higher rated bodies. -
Q: Does the valve come with flanges?
A: No, this is a wafer type valve designed to be installed between two flanges. Bolts pass through the valve body lugs. Flanges are not included. -
Q: What is the typical delivery time?
A: Standard DN80 PN16 valves are usually delivered within 15-25 working days after order confirmation, depending on quantity. Customizations may extend lead time. -
Q: Can I get a sample for testing?
A: Yes, we offer sample orders. Please contact our sales team to discuss sample cost and shipping arrangements. -
Q: Is the valve suitable for horizontal and vertical installation?
A: This valve can be installed in both horizontal and vertical pipelines (upward flow only). For vertical downward flow, a spring-loaded check valve is recommended.
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