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Home > Industrial Equipment & Components > Valve > Check Valve > Marine Dual Plate Check Valve for Seawater, Cast Iron Body, 316L Disc, DN50-DN600, PN1.0-1.6MPa
Marine Dual Plate Check Valve for Seawater, Cast Iron Body, 316L Disc, DN50-DN600, PN1.0-1.6MPa
Product Spotlights
Marine-grade dual plate check valve with cast iron body and 316L disc, designed for seawater systems. DN50-DN600, PN1.0-1.6MPa. ISO9001 certified. Compact wafer design reduces weight and installation cost. Non-slam operation, low pressure drop, and corrosion-resistant materials ensure long service life in harsh marine environments.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine / Seawater Systems
Body Material:
Cast Iron
Disc Material:
316L Stainless Steel
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine / Seawater Systems
Body Material
Cast Iron
Disc Material
316L Stainless Steel
Size Range
DN50 - DN600
Pressure Rating
PN1.0 - PN1.6 MPa
Connection Type
Wafer Type
Design Standard
API 594 / BS 5153
Temperature Range
-10℃ to +120℃
As a professional manufacturer with years of experience in valve production, Shanghai Zhibang Valve Manufacture Co., Ltd presents our Marine Dual Plate Check Valve – a robust solution designed specifically for seawater applications. Featuring a cast iron body and 316L stainless steel disc, this valve offers excellent corrosion resistance and reliable backflow prevention in demanding marine environments. With a size range from DN50 to DN600 and pressure ratings from PN1.0 to PN1.6 MPa, it meets the exacting requirements of shipbuilding, offshore platforms, and seawater desalination systems.
Key Features & Technical Advantages
- Dual Plate Design – Provides quick closing action and low pressure drop, reducing water hammer effects.
- Corrosion-Resistant Materials – Cast iron body with epoxy coating for seawater resistance; 316L disc and spring for long service life.
- Compact & Lightweight – Wafer-style construction saves space and simplifies installation between flanges.
- Full Flow Capacity – Large flow area minimizes head loss and ensures efficient system operation.
- Versatile Installation – Suitable for horizontal or vertical pipelines (upward flow).
- Low Maintenance – Non-slam operation reduces wear on components, extending maintenance intervals.
Technical Specifications
| Body Material | Cast Iron (GG25) |
| Disc Material | 316L Stainless Steel |
| Spring Material | 316L / Inconel X-750 (optional) |
| Seat / Seal | NBR, EPDM, or Viton (seawater grade) |
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN1.0 – PN1.6 MPa (150# available upon request) |
| Working Temperature | -10°C to +80°C (standard); up to +120°C with special seals |
| Design Standard | API 594, BS 5153, EN 558 |
| Face-to-Face | Short pattern per ISO 5752 |
| End Connection | Wafer type between flanges (PN10/16, ANSI 150#) |
Benefits for Your Application
- Seawater Compatibility – Tested against saltwater corrosion, ensuring years of reliable operation in marine environments.
- Reduced Installation Costs – Lightweight design allows one-person handling and eliminates the need for heavy supports.
- Energy Savings – Low pressure drop means pumps consume less power, lowering your operational costs.
- Reliable Backflow Prevention – Dual plates close instantly with spring assistance, preventing reverse flow and protecting equipment.
- Customizable Options – Available with different disc materials (316L, Duplex SS), coatings, and seal materials to match specific seawater conditions.
Company Credentials & Trust
Shanghai Zhibang Valve Manufacture Co., Ltd has been serving the global valve market since 2016. Our ISO9001 certified manufacturing facility ensures strict quality control from raw material inspection to final testing. With an annual export value of US$1 million to US$1.5 million, we have shipped valves to over 15 countries including those in North America, South America, Europe, and Southeast Asia. We are committed to providing high-quality products with competitive pricing and prompt delivery from our ports in Shanghai, Guangzhou, Hong Kong, and Beijing. Choose Zhibang for your marine valve needs – experience professionalism, reliability, and excellent after-sales support.
Frequently Asked Questions
-
Q: Can this check valve be used in vertical pipelines?
A: Yes, the dual plate check valve can be installed in vertical pipelines with upward flow. For vertical downward flow, please consult our engineering team for special spring options. -
Q: What is the maximum working pressure for DN600 size?
A: For DN600, the standard pressure rating is PN1.0 MPa. Higher pressure classes (PN1.6, Class 150) are available upon request with reinforced body design. -
Q: Are the valves factory tested before shipment?
A: All our valves undergo hydrostatic shell test and seat leakage test per API 598. Test certificates are provided with each order. -
Q: What coatings do you apply for seawater resistance?
A: Standard coating is epoxy paint (minimum 250 microns). For aggressive seawater, we recommend fusion-bonded epoxy or nylon coating. -
Q: Can I get the valve with a different disc material like Duplex 2205?
A: Yes, we offer optional disc materials including Duplex SS (2205) and Super Duplex (2507) for higher corrosion resistance. Please specify when ordering. -
Q: What is the typical lead time for DN50-DN300 sizes?
A: For standard sizes (DN50-DN300), lead time is typically 15-20 working days. Larger sizes (DN350-DN600) require 25-30 working days. Express delivery can be arranged for urgent orders. -
Q: Do you provide installation and maintenance manuals?
A: Absolutely. Each valve comes with detailed installation, operation, and maintenance instructions. We also offer technical support via email or phone. -
Q: Is this valve suitable for freshwater or other non-corrosive media?
A: Yes, it can be used in fresh water, cooling water, and many industrial fluids. For specific chemical compatibility, please contact our sales team with your media details.
For more information or to request a quotation, please contact Shanghai Zhibang Valve Manufacture Co., Ltd. We look forward to being your trusted partner in fluid control solutions.
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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