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Help CenterMarine Dual Plate Check Valve for Compressed Air, Cast Iron, Rubber Lined, DN50-DN200, PN1.0-1.6MPa, Wafer Connection, CCS
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Shanghai Zhibang Valve Manufacture Co., Ltd., a reliable manufacturer established in 2016 with an annual export value of US$1–1.5 Million, proudly presents the Marine Dual Plate Check Valve for Compressed Air. Designed to meet the rigorous demands of marine and industrial compressed air systems, this valve combines a durable cast iron body with a rubber lining for enhanced corrosion resistance and leak-tight performance. Available in sizes DN50–DN200 and pressure ratings PN1.0–1.6MPa, the wafer-type connection ensures easy installation between flanges, saving space and reducing weight. With CCS certification and ISO9001 quality management, this valve is built for long service life aboard ships and offshore platforms.
Key Features & Technical Specifications
- Dual Plate Design – Non-slam operation reduces water hammer, ideal for compressed air and low-pressure steam.
- Cast Iron Body (GG25) – High strength with improved fatigue resistance; optional ductile iron available.
- Rubber Lining (EPDM/NBR) – Protects against mild chemicals and seawater, extends valve life in marine atmospheres.
- Wafer Connection – Compact, lightweight design fits between standard flanges (ASME / DIN / JIS).
- Working Pressure: PN1.0 – 1.6 MPa (150 – 232 psi).
- Temperature Range: -10°C to +80°C (higher temp options on request).
- CCS Certified – Meets China Classification Society rules for marine applications.
| Parameter | Value |
|---|---|
| Size Range | DN50 – DN200 (2" – 8") |
| Pressure Rating | PN1.0 / PN1.6 (10 bar / 16 bar) |
| Body Material | Cast Iron (GG25) / Rubber Lining (EPDM/NBR) |
| Connection Type | Wafer (between flanges) |
| Applicable Media | Compressed air, fresh water, seawater, low-viscosity oils |
| Standard Flange | DIN / ANSI / JIS (customizable) |
| Certification | ISO9001:2015, CCS (China Classification Society) |
Product Advantages & Customer Benefits
Our marine dual plate check valve offers distinct advantages over conventional swing check valves:
- Space Saving: Wafer design reduces face-to-face length by up to 50%, allowing installation in tight piping layouts.
- Low Pressure Drop: Streamlined dual plates create minimal flow resistance, improving system efficiency.
- Non-Slam Operation: Spring-assisted closure prevents water hammer – critical for compressed air systems where sudden reverse flow can damage compressors.
- Corrosion Resistance: Rubber lining isolates the cast iron body from aggressive media, making it suitable for marine environments and deaerated water.
- Easy Maintenance: The valve can be disassembled without removing from the pipeline – replace rubber liners or plate assembly quickly.
- Versatile Installation: Works in horizontal, vertical, and inclined pipelines; bidirectional sealing available on request.
Quality Assurance & Company Credentials
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted valve supplier since 2016, exporting over US$1 million annually to global markets including North America, Europe, Southeast Asia, Africa, and Oceania. We hold ISO9001:2015 certification and our marine check valves are CCS-approved, ensuring compliance with the strictest shipbuilding standards.
Each valve undergoes rigorous testing: hydrostatic shell test (1.5x rated pressure), seat leakage test (air or water), and material verification. Our factory in Shanghai, China ships via Shanghai, Guangzhou, Hong Kong, or Beijing ports – choose the most convenient one for your logistics.
With a dedicated R&D team and a commitment to continuous improvement, we offer customized solutions such as special rubber compounds, extended temperature ranges, and different flange drilling patterns. We welcome OEM/ODM inquiries and provide 24/7 technical support.
Why wait? Contact us today for a competitive quotation – your marine compressed air system deserves a valve that delivers reliability and efficiency.
Frequently Asked Questions (FAQ)
-
Can this valve be used for compressed air with oil carryover?
Yes, the rubber lining (EPDM or NBR) is oil-resistant and can handle minor oil contamination; for heavy oil carryover, please specify NBR lining. -
What is the maximum operating temperature for DN200?
Standard temperature is up to 80°C. For higher temperatures (up to 120°C), we can supply a special EPDM or fluoroelastomer lining – please inquire. -
Does the valve come with counter flanges and gaskets?
No, flanges and gaskets are usually supplied by customer. However, we can provide companion flanges upon request as an optional extra. -
Is CCS certification included in the standard price?
Yes, all our marine valves are manufactured to CCS rules and the certification is included. We can also arrange third-party inspection (e.g., DNV, BV) at additional cost. -
What is the minimum order quantity (MOQ)?
For stock sizes (DN50–DN200, PN1.0/1.6), MOQ is 2 pieces. For special dimensions or materials, MOQ is 10 pieces. -
Can the rubber lining be replaced in the field?
Absolutely. The dual plate design allows the rubber liner to be removed and replaced without special tools. We supply spare liner kits. -
How does it compare to a swing check valve for compressed air?
The dual plate check valve has a shorter face-to-face dimension, lower pressure drop, and quicker closing response, making it more suitable for pulsating flow from compressors. -
Do you offer warranty?
Yes, standard warranty is 12 months from shipment. Extended warranty up to 24 months is available for an additional fee.
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