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Help CenterPrecision Machined Marine Dual Plate Check Valve, Carbon Steel Body, ISO 5752 Face-to-Face, NACE MR0175
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Shanghai Zhibang Valve Manufacture Co., Ltd. – a professional manufacturer established in 2016 with an annual export value of US$1–1.5 million – proudly presents our Precision Machined Marine Dual Plate Check Valve. Engineered with a robust carbon steel body and conforming to ISO 5752 face-to-face dimensions, this valve is designed for demanding marine and offshore applications. The dual plate design ensures quick closing action, minimizing water hammer and protecting downstream equipment. Built to NACE MR0175 standards, it is suitable for sour gas and corrosive environments. Whether you need reliable flow control for seawater, hydrocarbons, or process lines, our check valve delivers exceptional performance and longevity.
Our manufacturing process combines CNC precision machining with rigorous quality control, ensuring every valve meets strict tolerances. The dual plates are spring-loaded, providing a positive seal even under low backpressure. The carbon steel body offers high strength and durability, while optional seat materials (RPTFE, PTFE, or Nylon) accommodate a wide range of media. With ISO 5752 face-to-face dimensions, this valve is directly interchangeable with other manufacturers' products, simplifying maintenance and replacement. Available in sizes from DN50 to DN600 and pressure classes from 150 to 600, it fits seamlessly into your piping system.
Key Features & Benefits
- Precision Machined Sealing Surfaces – ensures zero leakage and extended service life.
- Spring-Loaded Dual Plates – rapid closing prevents reverse flow and reduces slamming.
- Carbon Steel Body (WCB/WCC) – excellent mechanical properties for high-pressure systems.
- NACE MR0175 Compliance – safe for sour service in oil & gas and marine environments.
- ISO 5752 Face-to-Face Dimensions – easy retrofit and installation.
- Compact Design – saves space and weight, ideal for offshore platforms and ships.
- Low Pressure Drop – optimized flow path reduces energy consumption.
- Application Versatility – suitable for water, oil, gas, steam, and corrosive fluids.
Technical Specifications
| Parameter | Value |
|---|---|
| Standard | API 594, ISO 5752 |
| Size Range | DN50 – DN600 (2" – 24") |
| Pressure Rating | Class 150, 300, 600 (PN16, PN40, PN100) |
| Body Material | Carbon Steel WCB / WCC |
| Disc Material | Stainless Steel (SS304, SS316, Duplex optional) |
| Seat Material | Metal / RPTFE / PTFE / Nylon |
| Temperature Range | -29°C to +350°C (-20°F to 662°F) |
| Connection Type | Wafer (Lug optional) |
| Compliance | NACE MR0175, ISO 9001 (factory) |
| Test Pressure | Shell: 1.5x rated; Seat: 1.1x rated |
Every valve is hydrostatically tested according to API 598 standards. The spring-loaded dual disc design ensures a tight shutoff and reliable operation under varying flow conditions. Our precision machining process guarantees flatness and concentricity, reducing wear and extending the life of the seal.
Why Choose Shanghai Zhibang Valve?
As a manufacturer with ISO 9001 certification and over 8 years of industry experience, Shanghai Zhibang Valve Manufacture Co., Ltd. delivers consistent quality. Our annual export value of US$1–1.5 million reflects the trust of customers in North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We provide customized solutions including special coatings, non-standard end connections, and alternative materials upon request.
Our products are shipped from Shanghai, Guangzhou, Hong Kong, or Beijing ports, ensuring timely delivery. We stock popular sizes for quick dispatch. Each valve comes with a material certificate and test report. Our team offers technical support throughout the project lifecycle, from selection to installation and maintenance.
Invest in reliability and long-term performance. The Precision Machined Marine Dual Plate Check Valve from Shanghai Zhibang Valve is the smart choice for marine, offshore, and industrial applications where safety and durability matter. Contact us today for a competitive quotation or to discuss your specific requirements.
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 that close quickly, reducing water hammer and requiring less space. Swing check valves have a single disc that swings open/closed and may be slower to respond, making dual plate valves ideal for systems with frequent flow changes.
2. Can this valve be used for seawater applications?
Yes, when ordered with stainless steel discs and optional seat materials, the valve is suitable for seawater. The carbon steel body can be coated with epoxy or other anti-corrosion layers for added protection. NACE MR0175 compliance also ensures performance in sour environments.
3. What is the maximum operating temperature?
The standard temperature range is -29°C to +350°C. For higher temperature requirements, we can offer alternative seat materials or metal-to-metal sealing upon request.
4. Does the valve require regular maintenance?
Dual plate check valves are generally low-maintenance. Periodic inspection of the spring and seating surfaces is recommended. The spring tension may decrease over time; replacement springs are available from our stock.
5. What is the meaning of ISO 5752 face-to-face dimension?
ISO 5752 specifies standard face-to-face dimensions for wafer-type check valves. This ensures interchangeability with other manufacturers' valves of the same size and pressure class, simplifying replacement and system design.
6. Can I get the valve with lug type ends instead of wafer?
Yes, lug type ends are available as an option. Please specify your requirement when ordering. Lug connections allow the valve to be removed from the pipeline without disturbing the downstream piping.
7. Does this valve comply with NACE MR0175 for sour gas?
Yes, the entire valve is designed and manufactured according to NACE MR0175/ISO 15156 requirements for sour service. Material certificates can be provided upon request.
8. What is the typical delivery time for standard sizes?
For standard sizes (DN50–DN300, Class 150/300), delivery is typically 15–25 working days. Larger sizes and special materials may require 30–45 working days. We maintain an inventory of common sizes for faster shipment.
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