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Help CenterZhibang Valve Dual Plate Check Valve DN50-DN600 PN1.0-1.6MPa CCS Certified Marine Grade Epoxy
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Shanghai Zhibang Valve Manufacture Co., Ltd. is a professional manufacturer specializing in high-performance industrial valves since 2016. Our Dual Plate Check Valve with Marine Grade Epoxy coating (DN50-DN600, PN1.0-1.6MPa) is designed to deliver reliable backflow prevention in demanding marine and industrial environments. Certified with CCS (China Classification Society) and ISO9001 quality management system, this valve combines robust construction, advanced sealing technology, and superior corrosion resistance – ensuring long service life and minimal maintenance. Whether you are building new vessels or upgrading piping systems, our check valve offers a cost-effective, high-performance solution that meets global standards.
Key Features & Technical Specifications
- Dual Disc Design – Two spring-loaded discs close quickly to prevent water hammer and backflow, reducing pressure drop and noise.
- Marine Grade Epoxy Coating – Provides exceptional resistance to seawater, chemicals, and harsh atmospheric conditions. Suitable for offshore platforms, ships, and coastal plants.
- Full Size Range – Available from DN50 to DN600, covering PN1.0 to PN1.6 MPa pressure ratings. Custom dimensions can be arranged upon request.
- Wafer / Lug Connection – Compact lightweight design saves space and simplifies installation between flanges. Optional lug version for dead-end service.
- Material Options – Standard ductile iron (GGG40/GGG50) or carbon steel body. Trim materials include stainless steel (SS304/SS316) for enhanced durability.
- Certifications – CCS (China Classification Society) approved for marine applications; ISO9001:2015 certified factory.
- Low Maintenance – Self-cleaning disc design reduces fouling; no external moving parts.
| Parameter | Value |
|---|---|
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | PN1.0 – PN1.6 MPa (150 lb class) |
| Body Material | Ductile Iron (GGG40/GGG50) or Carbon Steel (WCB) |
| Disc Material | Stainless Steel (SS304/SS316 / Duplex) |
| Coating | Marine Grade Epoxy (min. 250 microns) |
| Operating Temp. | -10°C to +80°C (standard); optional high‑temp up to 200°C |
| Connection Type | Wafer (between flanges) / Lug (optional) |
| Standards & Certifications | CCS, ISO9001, API 594, BS EN 12982 |
Why Choose Zhibang Dual Plate Check Valve?
- Proven Marine Performance – The CCS certification guarantees that the valve meets stringent safety and reliability standards required by the shipping industry. It is widely used in ballast systems, cooling water lines, and fuel oil handling.
- Superior Corrosion Protection – The epoxy coating is applied using electrostatic powder technology, forming a tough, pinhole‑free barrier that withstands salt spray and chemical exposure for over 2000 hours in neutral salt spray tests (ASTM B117).
- Energy Efficiency – The dual disc design reduces pressure loss by up to 30% compared to traditional swing check valves, helping lower pump energy consumption.
- Quick & Reliable Closure – The spring‑loaded discs respond instantly to reverse flow, preventing damage to upstream equipment and reducing water hammer effects.
- Global Service & Fast Delivery – With an annual export value of US$1 – 1.5 million, we ship from Shanghai, Guangzhou, Hong Kong, and Beijing ports to over 30 countries worldwide. Main markets include North America, South America, Europe, Southeast Asia, Africa, and Oceania.
Trusted by Industry Leaders
Since our establishment in 2016, Shanghai Zhibang Valve has built a reputation for quality and reliability. Our production facility is ISO9001 certified, and every valve undergoes strict pressure testing (shell test 1.5× rating, seat test 1.1× rating) before shipment. We also offer customizable options such as special end connections, higher pressure ratings, or alternative coating colors to match your project specifications. Contact our technical team today for a quotation or technical datasheet – we are ready to support your marine and industrial valve needs with competitive pricing and professional after‑sales service.
Frequently Asked Questions (FAQ)
1. What is the pressure rating of this dual plate check valve?
The standard pressure rating is PN1.0 to PN1.6 MPa, equivalent to 150 lb class. Higher ratings (e.g., PN2.5 or 300 lb) are available upon request.
2. Is the valve suitable for seawater applications?
Yes. The marine grade epoxy coating combined with stainless steel discs makes it highly resistant to seawater corrosion. It is CCS certified for marine use.
3. What certifications does this valve hold?
It is certified by CCS (China Classification Society) and manufactured in an ISO9001:2015 certified facility. Other certifications such as ABS or DNV can be arranged for additional cost.
4. Can I install this valve vertically or horizontally?
The dual plate check valve can be installed in both horizontal and vertical pipelines (upward flow recommended). Consult our installation manual for proper orientation.
5. What is the temperature range of the epoxy coating?
Standard coating is rated for -10°C to +80°C. For higher temperature applications (up to 200°C), an optional high‑temperature epoxy or other coating is available.
6. How long is the delivery time?
For standard sizes (DN50–DN300), delivery is typically 15–30 days. Larger sizes or custom orders may require 30–45 days. We ship from Chinese ports including Shanghai, Guangzhou, and Hong Kong.
7. Do you offer a warranty?
Yes, we provide a 12‑month warranty from the date of shipment against manufacturing defects. Extended warranty options can be discussed.
8. Can I get a sample before bulk order?
Of course. Sample orders are welcome, and we can provide a small quantity for testing. Please contact us for sample cost and lead time.
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