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DN50-DN200 PN16 Marine Check Valve for Compressed Air Systems per CB/T4303 Standard
Product Spotlights
CB/T4303-compliant marine swing check valve for DN50-DN200 compressed air systems. Features PN16 pressure rating, robust cast steel/ductile iron construction with NBR seat, and flanged connections. Ensures reliable backflow prevention, system safety, and minimal pressure drop. ISO9001-certified manufacturing supports global marine applications with durable, low-maintenance performance.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Marine Compressed Air Systems
Valve Type:
Swing Check Valve
Size Range:
DN50 to DN200
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine Compressed Air Systems
Valve Type
Swing Check Valve
Size Range
DN50 to DN200
Pressure Rating
PN16
Standard Compliance
CB/T4303
Connection Type
Flanged
Material (Body/Disc)
Cast Steel/Ductile Iron
Seat Material
NBR
Suitable Media
Compressed Air
As a professional manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance marine valves. Our DN50-DN200 PN16 Marine Check Valve is engineered specifically for compressed air systems onboard vessels, ensuring reliable and safe operation in demanding maritime environments. Designed and manufactured in strict accordance with the CB/T4303 standard, this valve is a critical component for preventing backflow and protecting upstream equipment. With our ISO9001-certified quality management system and annual export value reaching US$1-1.5 million, we are committed to delivering valves that meet the rigorous demands of global marine applications.
This swing check valve is indispensable for maintaining the integrity of your ship's compressed air system. Its robust construction and precise engineering offer significant advantages:
- Reliable Backflow Prevention: The swing disc design ensures automatic and immediate closure upon flow reversal, safeguarding compressors, air receivers, and other vital components from potential damage caused by backflow.
- Enhanced System Safety: By maintaining unidirectional flow, it prevents pressure surges and contamination in the air supply lines, contributing to overall operational safety on board.
- Durable Marine-Grade Construction: Built with materials selected for corrosion resistance and strength, the valve withstands the harsh conditions of saltwater environments, ensuring a long service life.
- Minimal Pressure Drop: The optimized internal flow path is designed to minimize resistance, ensuring efficient airflow and reducing energy consumption of the compressed air system.
- Low Maintenance: Simple design with fewer moving parts translates to reliable operation and reduced maintenance requirements, lowering your total cost of ownership.
Technical Specifications & Detailed Features
Our marine check valve is meticulously crafted with attention to every technical detail to guarantee performance and compliance.
| Parameter | Specification / Description |
| Product Model / Type | Swing Check Valve |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating | PN16 (16 bar) |
| Design & Manufacturing Standard | CB/T4303 (Chinese Shipbuilding Standard) |
| Connection Type | Flanged (Face-to-face dimensions per standard) |
| Body Material (Typical) | Cast Steel (e.g., WCB) or Ductile Iron |
| Disc / Flap Material | Cast Steel or Ductile Iron |
| Seat Seal Material | Nitrile Rubber (NBR) or equivalent resilient material |
| Hinge Pin Material | Stainless Steel (e.g., 304/316) |
| Suitable Media | Compressed Air (Non-lubricated or lubricated) |
| Operating Temperature Range | -20°C to +120°C (dependent on seal material) |
| Flow Direction | Horizontal or Vertical (upward flow recommended) |
Key Advantages for Your Operations:
- Compliance Assurance: Full compliance with CB/T4303 ensures the valve meets specific requirements for marine applications, facilitating approval processes for shipbuilding and repair projects.
- Global Supply Chain Support: With major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely and efficient logistics to our global customer base across North America, South America, Europe, Asia, Africa, and Oceania.
- Material Flexibility: While standard materials are listed, specific material grades (e.g., CF8M for more corrosive environments) can be customized upon request to suit unique project specifications.
- Precision Machining: Flanges are accurately machined to ensure perfect alignment and leak-free connection to the pipeline, reducing installation time and potential issues.
- Rigorous Testing: Each valve undergoes factory testing, including shell tests and seat leakage tests, to verify its pressure integrity and sealing performance before shipment.
Choosing Shanghai Zhibang's marine check valve means investing in reliability backed by a manufacturer with a proven track record. Our ISO9001 certification is a testament to our consistent quality control processes. Serving a diverse range of markets from Eastern Europe to Southeast Asia and North America, our products have been trusted in numerous marine projects. The valve's design focused on durability and low maintenance directly translates to reduced downtime and operational costs for your vessel. For a critical component where failure is not an option, our CB/T4303-compliant check valve delivers the performance and peace of mind you require. Contact us today to discuss your specific requirements or to request detailed quotations and technical documentation.
Frequently Asked Questions (FAQ)
-
Q: Is this valve suitable for vertical installation in a compressed air line?
A: Yes, it is suitable for vertical installation. For optimal performance and to ensure proper disc closure, we recommend installing it in a vertical line with the flow direction moving upward. -
Q: What is the main difference between your valve and a standard industrial check valve?
A: Our valve is specifically designed and manufactured per the CB/T4303 marine standard. This often involves material selections, testing protocols, and design details tailored for the harsh marine environment, which may differ from general industrial standards. -
Q: Can you provide valves with different flange standards, like ANSI or JIS?
A: While the standard offering complies with the flange dimensions referenced in CB/T4303, we can often accommodate other flange standards (e.g., ANSI, DIN, JIS) as a customization option. Please specify your requirements during inquiry. -
Q: What is the expected service life of this check valve in a marine setting?
A: With proper application (correct media, pressure, and temperature) and occasional maintenance, the valve is designed for a long service life. The use of corrosion-resistant materials and stainless steel internal components significantly enhances durability in salty, humid conditions. -
Q: Do you perform any tests before shipping the valves?
A: Yes, as part of our ISO9001 quality system, each valve typically undergoes a hydrostatic shell test and a seat leakage test (often using air) to ensure it meets the specified pressure rating and provides a tight seal. -
Q: Are spare parts like the disc or seal ring available?
A: Yes, we provide spare parts kits for our valves. It is recommended to order critical spares during your initial purchase to minimize downtime in case of future maintenance needs. -
Q: What is the lead time for an order of DN100 check valves?
A: Lead time depends on order quantity and current production schedule. For standard sizes and materials, we generally maintain some stock or have shorter production cycles. Please contact us with your specific quantity for an accurate delivery estimate. -
Q: Can this valve be used for media other than compressed air?
A: This valve is primarily designed for compressed air systems. Its suitability for other media (like water, oil, or gas) depends on the material compatibility and pressure/temperature ratings. Please consult our technical team for applications involving different media.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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