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Home > Industrial Equipment & Components > Valve > Check Valve > Marine Flanged Dual Plate Check Valve Cast Steel DN50-DN300 Stainless Steel Disc NBR Seal DNV BV
Marine Flanged Dual Plate Check Valve Cast Steel DN50-DN300 Stainless Steel Disc NBR Seal DNV BV
Product Spotlights
High-quality marine dual plate check valve in cast steel, DN50-DN300, with stainless steel disc and NBR seal. Compact design, non-slam closure, low pressure drop. Customizable with DNV/BV certification. Direct factory price, ISO9001 certified, global shipping.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine
Size Range:
DN50 - DN300 (2“ - 12“)
Body Material:
Cast Steel (WCB/LCB/WCC optional)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine
Size Range
DN50 - DN300 (2“ - 12“)
Body Material
Cast Steel (WCB/LCB/WCC optional)
Disc Material
Stainless Steel (SS304/SS316 optional)
Seal Material
NBR (Nitrile Butadiene Rubber)
Connection Type
Flanged (ANSI 150/300, DIN PN10/PN16/PN25)
Pressure Rating
PN10/PN16/PN25 or Class 150/300 (optional)
Standards
API 594, ISO 5752, available DNV/BV upon request
Certification
ISO9001:2016
Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to present our Marine Flanged Dual Plate Check Valve in cast steel construction, available from DN50 to DN300. Designed specifically for demanding marine and offshore applications, this valve combines a lightweight, space-saving dual plate design with a durable stainless steel disc and reliable NBR seal. With over 8 years of manufacturing experience and annual export value exceeding US$1 million, we ensure each valve meets rigorous quality standards. The dual-plate technology provides low pressure drop, non-slam closure, and easy installation, making it a top choice for shipbuilding, ballast systems, and industrial pipelines requiring a dependable check valve solution.
Product Features & Benefits
- Compact & Lightweight: The dual plate design reduces overall length and weight by up to 40% compared to swing check valves, saving valuable space in cramped marine piping systems.
- Non-Slam Operation: Springs ensure rapid closing of plates at zero flow, preventing water hammer and system damage even in pulsating flow conditions.
- Corrosion Resistance: Stainless steel disc (SS304/SS316) and NBR seal resist seawater, oil, and aggressive fluids, ideal for marine environments.
- Bidirectional Sealing: Optional backseat design available for zero leakage in reverse pressure conditions.
- Low Maintenance: Simple structure with few moving parts reduces downtime and maintenance costs.
- Easy Installation: Flanged ends conform to ANSI, DIN, or JIS standards, allowing direct bolt-on replacement of existing valves.
Technical Specifications (Table)
| Parameter | Details |
|---|---|
| Size Range | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 (2" - 12") |
| Pressure Rating | PN10, PN16, PN25 (Class 150, Class 300 optional) |
| Body Material | Cast Steel (WCB / LCB / WCC available upon request) |
| Disc Material | Stainless Steel (SS304, SS316, SS316L) |
| Seat / Seal | NBR (Nitrile Rubber) – optional EPDM, Viton |
| Face-to-Face | API 594 / ISO 5752 short pattern |
| Flange Drilling | ANSI B16.5 / DIN 2501 / JIS B2220 (customizable) |
| Temperature Range | -20°C to +120°C (NBR), -40°C to +200°C (optional EPDM) |
| Test Pressure | Shell: 1.5 x PN, Seat: 1.1 x PN |
| Certifications | ISO9001:2016; DNV/BV type approval available upon request |
Design & Quality Assurance
Each Marine Flanged Dual Plate Check Valve is manufactured under strict ISO9001:2016 quality management system, with 100% pressure testing prior to dispatch. The short face-to-face dimension conforms to API 594, allowing direct replacement of any standard dual plate check valve. The spring-loaded plates respond instantly to flow changes, ensuring positive shut-off and protection against backflow. For marine applications, we offer optional DNV (Det Norske Veritas) or BV (Bureau Veritas) certification to meet classification society requirements – simply request when ordering.
Why Choose Shanghai Zhibang?
- Reliable Manufacturer: Since our establishment in 2016, we have focused only on industrial valves, accumulating rich technical expertise.
- Global Reach: Annual export volume of US$1-1.5 million, shipping to North America, South America, Europe, Southeast Asia, Africa, Oceania, Middle East, and more from Shanghai, Guangzhou, Hong Kong, and Beijing ports.
- Customization: We offer tailored solutions for special materials (duplex, super duplex), different end connections, and certificates to meet your project specifications.
- Competitive Pricing: Direct factory pricing with no middlemen – you get high quality at cost-effective rates.
- After-Sales Support: Dedicated technical team available for installation guidance, troubleshooting, and warranty service.
We invite you to contact us for a quotation or to discuss your specific requirements. With our proven track record and quality-focused approach, Shanghai Zhibang Valve Manufacture Co., Ltd. will be your trusted partner for marine check valves. Request a sample or visit our factory in Shanghai to see our production lines and quality control processes firsthand.
Frequently Asked Questions (FAQ)
-
Q: What maximum temperature can this valve handle?
A: With the standard NBR seal, the temperature range is -20°C to +120°C. For higher temperatures, we recommend an EPDM or Viton seal (up to +200°C). -
Q: Is the DNV/BV certificate included by default?
A: No, but we can provide the valve with DNV or BV type approval upon request. Please specify the required classification society when placing the order to allow for the certification process. -
Q: Can the valve be installed vertically?
A: Yes, the dual plate check valve can be installed in any orientation – horizontal, vertical, or inclined – as long as flow direction matches the arrow on the body. Spring force ensures closure regardless of position. -
Q: What media can this valve handle?
A: The cast steel body with stainless steel disc and NBR seal is suitable for seawater, freshwater, oil, air, and many industrial fluids. Avoid strong acids or bases unless special materials are selected. -
Q: Do you provide spare parts?
A: Yes, we supply spare disc springs, seals, and complete repair kits. Contact our sales team for part numbers and availability. -
Q: What is the lead time for DN50-DN300 sizes?
A: Standard sizes like DN50-DN200 are often in stock and can ship within 7-15 days after payment. DN250-DN300 require 15-25 days depending on quantity. Custom materials or certifications may extend lead time. -
Q: How is the valve packaged for export?
A: Each valve is individually wrapped in bubble film, placed in a plywood case or steel pallet, and labeled with all relevant markings to ensure safe transportation. -
Q: Can I get a test certificate?
A: Yes, we provide a Material Certificate (EN 10204 3.1) and a Hydrostatic Test Report with every valve. Additional third-party inspection can be arranged.
Trust Shanghai Zhibang Valve Manufacture Co., Ltd. – your reliable partner for marine valves since 2016. Contact us today for a customized solution!
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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