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Help CenterStainless Steel Disc Marine Dual Plate Check Valve Wafer Type DN80-DN600 PN16 Anti-Backflow
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Shanghai Zhibang Valve Manufacture Co., Ltd proudly presents our Stainless Steel Disc Marine Dual Plate Check Valve Wafer Type DN80-DN600 PN16 Anti-Backflow. Designed for demanding marine and industrial applications, this check valve combines reliable anti-backflow performance with a compact wafer design, making it ideal for space-constrained piping systems. Manufactured in our ISO9001-certified facility in Shanghai, each valve undergoes rigorous quality checks to ensure long-term durability and leak-free operation. With over 8 years of export experience across six continents, we deliver valves that meet international standards and exceed customer expectations.
Product Features & Technical Advantages
- Dual Plate Design: Two spring-loaded plates ensure quick closing and minimal water hammer, effectively preventing backflow even under low pressure.
- Stainless Steel Disc & Body: Corrosion-resistant materials (CF8/CF8M/316L) suit marine environments, seawater, and aggressive fluids.
- Wafer Type Connection: Compact structure allows easy installation between flanges, saving space and reducing weight compared to swing check valves.
- Wide Size Range: DN80 to DN600 (3″ to 24″) covers most industrial pipeline needs.
- PN16 Pressure Rating: Suitable for standard low-to-medium pressure systems (up to 16 bar).
- Anti-Backflow Performance: Reliable sealing ring and precise plate closure prevent reverse flow effectively.
- Low Pressure Drop: Streamlined flow path reduces energy loss and maintains system efficiency.
- Easy Maintenance: Simple construction allows quick inspection and replacement of internal parts.
Technical Specifications (Typical)
| Parameter | Value |
| Size Range | DN80 – DN600 (3″ – 24″) |
| Pressure Rating | PN16 (16 bar / 232 psi) |
| Body Material | Stainless Steel (CF8, CF8M, 316L optional) |
| Disc Material | Stainless Steel |
| Seal Material | EPDM / NBR / Viton (optional) |
| Connection Type | Wafer (between flanges) |
| Application | Marine, desalination, HVAC, water treatment, oil & gas |
| Standards | API 594, BS 1868, ISO9001 certified |
Our dual plate check valve is designed to provide consistent, maintenance-free operation in both horizontal and vertical pipelines. The spring-assisted closure minimizes slam and vibration, extending valve life and protecting downstream equipment. The wafer profile reduces overall installation footprint, which is particularly valuable in marine engine rooms and offshore platforms where space is at a premium.
We understand that reliable backflow prevention is critical for system safety and efficiency. Therefore, each valve is hydrostatically tested to ensure zero leakage at rated pressure. Optional materials such as 316L stainless steel and advanced elastomers are available for highly corrosive media or elevated temperature applications.
Why Choose Shanghai Zhibang Valve?
- ✅ ISO9001 Certified Manufacturer — established in 2016 with consistent quality management.
- ✅ Global Export Experience — annual export value US$1–1.5 million, serving markets in North America, Europe, Southeast Asia, Africa, Oceania, and beyond.
- ✅ Flexible Shipping — we ship from Shanghai, Guangzhou, Hong Kong, or Beijing according to your convenience.
- ✅ Customizable Options — sealing materials, sizes, and end connections can be tailored for your specific project.
- ✅ Competitive Lead Time — efficient production scheduling ensures timely delivery for both standard and custom orders.
Backed by over 8 years of specialized valve manufacturing, we have supplied thousands of check valves to marine, water treatment, and industrial clients worldwide. Our dedicated technical team provides prompt pre-sales consultation and after-sales support. Contact us today for a quote or technical drawing — experience reliable anti-backflow protection with the confidence of ISO9001 quality.
Frequently Asked Questions (FAQ)
1. What is the difference between a dual plate check valve and a swing check valve?
A dual plate check valve uses two spring-loaded plates to close quickly, reducing water hammer and allowing installation in any orientation. It is lighter and more compact than a swing check valve, making it ideal for marine and space-limited applications.
2. Can this valve be installed vertically?
Yes, the stainless steel dual plate check valve can be installed in both horizontal and vertical pipelines. For vertical installation with upward flow, the spring tension is sufficient to ensure proper closure.
3. What materials are available for the sealing ring?
Standard sealing materials are EPDM and NBR. For higher temperature or chemical resistance, Viton (FKM) or PTFE-lined options are available upon request. Please specify your media and temperature when ordering.
4. What pressure test do you perform?
All valves are hydrostatically tested at 1.5 times the rated pressure for shell integrity, and a low-pressure seat leak test is performed to ensure zero backflow. Certificates of test are provided upon request.
5. What is the minimum pressure required to open the disc?
The cracking pressure is typically very low (around 0.02–0.05 bar) depending on size and spring configuration. This allows the valve to operate efficiently even in low-flow conditions.
6. Do you provide non-standard sizes or pressure ratings?
Yes, we can manufacture custom sizes and pressure classes (e.g., PN10, PN25, Class 150) subject to material and design feasibility. Contact our sales team with your requirements.
7. What is the typical lead time for standard sizes?
For standard sizes DN80–DN300, lead time is usually 15–25 working days. Larger sizes (DN350–DN600) may require 25–35 working days. Express delivery can be arranged for urgent orders.
8. Is this valve suitable for seawater applications?
Absolutely. With stainless steel body and disc (especially 316L) and appropriate elastomer seals, the valve offers excellent corrosion resistance in seawater, desalination plants, and offshore environments.
For more detailed product specifications, installation manuals, or a customized quotation, please contact our professional team directly. We look forward to serving your valve needs with quality products and efficient global logistics.
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