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Help CenterOffshore Compressed Air Pipeline Marine Dual Plate Check Valve, Cast Iron, Rubber Seal, DN50-DN200, PN1.6MPa, Wafer, CCS
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We, Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, are a professional manufacturer specializing in high-quality valves for marine and offshore applications. With an annual export value of US$1 million to US$1.5 million and ISO9001 certification, we are committed to delivering reliable products to global markets. Our Offshore Compressed Air Pipeline Marine Dual Plate Check Valve is designed to meet the rigorous demands of shipboard and offshore platform compressed air systems, featuring a robust cast iron body, rubber seal, and wafer-style connection. This valve ensures efficient backflow prevention, minimal pressure drop, and long service life, making it a trusted choice for marine engineers worldwide.
Product Overview
This dual plate check valve is specifically engineered for offshore compressed air pipelines and marine environments. Its compact wafer design allows for easy installation between flanges, saving space and reducing weight. The cast iron construction provides excellent corrosion resistance in seawater or humid conditions, while the rubber seal ensures a tight shutoff. Available in sizes from DN50 to DN200 with a pressure rating of PN1.6MPa (232 psi), this valve conforms to CCS (China Classification Society) standards, ensuring compliance with international marine regulations.
Technical Specifications
| Parameter | Value |
|---|---|
| Body Material | Cast Iron (GG25) |
| Seal Material | NBR / EPDM Rubber (optional) |
| Size Range | DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating | PN1.6MPa |
| Connection | Wafer type (between flanges) |
| Working Temperature | -10°C to +80°C (for NBR); -20°C to +120°C (for EPDM) |
| Application Medium | Compressed air, fresh water, seawater, non-aggressive gases |
| Design Standard | API 594, BS 5153, CCS approval |
Key Features & Benefits
- Dual Plate Design – Two spring-loaded plates provide rapid closing action, minimizing water hammer and preventing reverse flow even under low-pressure conditions.
- Compact Wafer Body – Slim profile reduces installation space and weight, making it ideal for tight marine piping layouts.
- Cast Iron Construction – High strength and excellent corrosion resistance in marine atmospheres; suitable for long-term offshore service.
- Rubber Seal – Ensures bubble-tight shutoff with low leakage rates; available in NBR or EPDM for different temperature and chemical compatibility.
- CCS Certified – Fully complies with China Classification Society rules, acceptable for use on Chinese-flagged vessels and offshore platforms.
- Low Pressure Drop – Streamlined flow path reduces energy loss, improving system efficiency.
- Easy Maintenance – Replaceable seat rings and springs; no special tools required for field service.
- Versatile Applications – Suitable for compressed air, cooling water, ballast water, and other non-corrosive fluids in marine systems.
Why Choose Our Valve?
Our dual plate check valve undergoes rigorous quality control during casting, machining, assembly, and pressure testing. Each valve is hydrostatically tested at 1.5 times the rated pressure and 100% leak-tested to ensure reliability. With over 7 years of manufacturing experience, Shanghai Zhibang Valve has supplied thousands of valves to shipyards, offshore engineering companies, and marine equipment distributors across North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our factory in Shanghai enables efficient logistics through Shanghai, Guangzhou, Hong Kong, and Beijing ports, ensuring timely delivery worldwide.
We understand that marine and offshore environments demand the highest standards. That is why we offer customizable options such as extended stems, lifting lugs, special coatings, or alternative seal materials (e.g., Viton). Our technical team is ready to assist with selection, installation guidance, and after-sales support. We also provide competitive pricing for OEM/ODM projects.
Frequently Asked Questions (FAQ)
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Q: What is the main application of this check valve?
A: It is specifically designed for offshore compressed air pipelines, marine ballast systems, and other non-corrosive fluid services on ships and offshore platforms. -
Q: Can I install this valve vertically or horizontally?
A: Yes, the dual plate check valve can be installed in any orientation (horizontal, vertical, or inclined) as long as the flow direction matches the arrow on the body. -
Q: Does the valve come with flange gaskets or bolts?
A: No, the wafer-style valve is mounted between existing flanges using bolts supplied by the installer. We can provide matching gaskets upon request. -
Q: Is the rubber seal resistant to seawater?
A: Yes, our standard NBR seal is suitable for fresh water and oil mist; for direct seawater contact, we recommend EPDM rubber. Please specify your medium when ordering. -
Q: What certifications do you have for this valve?
A: The valve is manufactured under ISO9001:2015 quality management system and can be supplied with CCS type approval certificate. Other certifications (DNV, BV, LR) are available upon request. -
Q: What is the expected service life in a compressed air system?
A: With proper installation and periodic inspection, the valve can last 10-15 years in normal operating conditions. Regular replacement of seals (every 3-5 years) is recommended. -
Q: Can you provide custom sizes or higher pressure ratings?
A: Yes, we can customize valves up to PN4.0MPa or larger sizes (DN250-DN600) subject to technical evaluation. Contact our sales team for details. -
Q: Do you have stock for DN100 PN1.6MPa?
A: Popular sizes like DN100 and DN150 are usually in stock. Smaller quantities can be shipped within 7-15 days; larger orders may require 20-30 days lead time.
As a reliable manufacturer with strong export experience and a customer-centric approach, Shanghai Zhibang Valve is your ideal partner for marine and offshore valves. We invite you to request a quotation or discuss your project requirements. Our team is dedicated to providing high-quality products, prompt communication, and competitive prices. Choose our Offshore Compressed Air Pipeline Marine Dual Plate Check Valve for dependable performance and peace of mind.
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