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Home > Industrial Equipment & Components > Valve > Check Valve > Wafer Connection Marine Stainless Steel Dual Plate Check Valve, 304/316L Material, PN1.0-4.0MPa, DN50-DN300
Wafer Connection Marine Stainless Steel Dual Plate Check Valve, 304/316L Material, PN1.0-4.0MPa, DN50-DN300
Product Spotlights
Marine-grade 304/316L stainless steel dual plate check valve with wafer connection, PN1.0-4.0MPa, DN50-DN300. Spring-loaded design for low water hammer, compact space-saving profile, and ISO9001 quality. Ideal for seawater, oil, and gas systems. Customizable seat materials and fast global shipping from Shanghai.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, 304/316L Stainless Steel
Application:
Other, Marine
Standard:
Other, ISO9001
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, 304/316L Stainless Steel
Application
Other, Marine
Standard
Other, ISO9001
Type
Dual Plate Check Valve
Connection
Wafer Type
Pressure Rating
PN1.0-4.0MPa
Size Range
DN50-DN300
Design Feature
Spring-Loaded Plates
Shanghai Zhibang Valve Manufacture Co., Ltd., an ISO9001-certified manufacturer since 2016, proudly presents our Wafer Connection Marine Stainless Steel Dual Plate Check Valve. Designed for harsh marine environments, this valve combines 304/316L stainless steel construction with a compact, lightweight wafer body, ensuring reliable backflow prevention in limited-space installations. With a pressure range of PN1.0 to 4.0MPa and sizes from DN50 to DN300, it delivers consistent performance for seawater, oil, and gas applications. Our engineering team has optimized the dual-plate design to minimize pressure drop while maintaining a tight seal, making it a cost-effective choice for new builds and retrofits alike.
Key Features & Technical Specifications
- Material Excellence: Full 304 or 316L stainless steel body, disc, and spring – resists corrosion from saltwater and acidic fluids.
- Wafer Connection: Slim profile fits between flanges (ANSI/DIN/JIS), reducing weight and installation space by up to 50% compared to swing check valves.
- Dual Plate Design: Two spring-loaded plates close immediately upon flow reversal, minimizing water hammer and noise.
- Pressure Capability: Rated for PN1.0, PN1.6, PN2.5, and PN4.0 MPa, covering most low-to-medium pressure systems.
- Size Versatility: DN50 (2") to DN300 (12") – suitable for main engine cooling, ballast water, and fire-fighting lines.
- Temperature Range: -20°C to +200°C, with optional high-temperature seat materials.
| Parameter | Value |
|---|---|
| Body Material | 304 SS / 316L SS |
| Disc Material | 304 SS / 316L SS |
| Spring Material | 316L SS (standard) |
| Seat Seal Material | NBR / EPDM / Viton (optional) |
| End-to-End Dimension | Per API 594 / EN 558 |
| Test Pressure (Shell) | 1.5 x Rated Pressure |
| Test Pressure (Seat) | 1.1 x Rated Pressure |
Customer Benefits
- Reduced installation costs – no additional gaskets or special tools required.
- Long service life with minimal maintenance, thanks to corrosion-resistant materials and robust spring operation.
- Smooth flow path with low cracking pressure (0.005 MPa), ideal for gravity-fed or low-head systems.
- Replaceable seat rings allow field repair without removing the valve body.
- Complies with international standards (ISO9001 quality system), ensuring consistent performance across multiple projects.
Trust & Reliability
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has exported over US$1 million annually to markets including North America, Europe, Southeast Asia, and Africa. Our ISO9001-certified factory in Shanghai ensures every dual plate check valve undergoes rigorous hydrostatic and seat leakage testing. With shipping ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we deliver globally within 30–45 days. Choose Zhibang for valves that combine marine-grade durability with competitive pricing. Contact us today for a quote or technical consultation.
Frequently Asked Questions
-
Q: What is the difference between 304 and 316L material for this valve?
A: 316L contains molybdenum, providing superior resistance to chlorides and acidic environments, making it recommended for seawater or high-corrosion marine applications. 304 is cost-effective for fresher water or oil lines. -
Q: Can this valve be used in vertical piping?
A: Yes, the dual plate design is spring-assisted, allowing proper closure in both horizontal and vertical upward-flow installations. For vertical downward flow, please consult our engineering team. -
Q: What are the available end connections?
A: This wafer valve fits between flanges (ANSI 150/300, DIN PN10/16/25/40, JIS 10K/20K). The face-to-face dimensions meet API 594 and EN 558 standards. -
Q: Do you provide custom seat materials?
A: Yes, we offer NBR (standard), EPDM, and Viton seat seals. For high-temperature (up to 350°C) or abrasive media, we can supply metal-to-metal seats upon request. -
Q: What is the typical lead time?
A: For standard sizes (DN50-DN200) we ship within 25–30 days. Larger sizes (DN250-DN300) require 35–45 days. Express delivery is available for urgent orders. -
Q: Is this valve certified for marine use?
A: While we do not hold classification society certificates (e.g., DNV, ABS), our ISO9001 quality system ensures consistent manufacturing. We can provide material certificates and test reports upon request. Many clients use these valves in non-critical marine systems such as cooling water and ballast. -
Q: How does the dual plate design reduce water hammer?
A: The spring-loaded plates close rapidly as soon as forward flow ceases, preventing reverse flow and slamming. The torsion spring design ensures even closing force distribution. -
Q: Can I get a sample order before bulk purchase?
A: Absolutely. We accept sample orders for validation. Sample lead time is 15–20 days, and the cost can be deducted from your first bulk order.
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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