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Help CenterCB/T4303 Compliant Marine Butterfly Check Valve for Compressed Air, DN80-DN150 Size Range
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd specializes in producing high-quality marine valves that meet stringent industry standards. Our CB/T4303 Compliant Marine Butterfly Check Valve for Compressed Air is engineered specifically for the demanding environments of shipboard compressed air systems. Designed within the DN80 to DN150 size range, this valve offers reliable flow control and check functionality, ensuring system safety and operational efficiency for maritime applications worldwide.
This butterfly check valve integrates a compact butterfly disc design with an integrated check mechanism, providing both throttling/on-off control and prevention of backflow in compressed air lines. Its compliance with the CB/T4303 standard guarantees its suitability for marine use, addressing requirements for materials, pressure ratings, and construction durability. We focus on delivering valves that combine robust performance with ease of operation, helping our clients in shipbuilding, offshore platforms, and marine engineering to maintain their critical air systems with confidence.
The core value of this product lies in its dual-functionality and marine-grade reliability. It simplifies piping layouts by eliminating the need for separate check valves and control valves, reducing installation space and cost. The design prioritizes quick actuation, low maintenance, and long service life even under continuous operation with compressed air, which can contain moisture and particulates. For global buyers sourcing from Shanghai, Guangzhou, Hongkong, or Beijing ports, our valves represent a dependable component choice backed by our ISO9001 certified manufacturing processes.
- Dual-Function Design: Acts as both a butterfly valve for flow control and a check valve to prevent reverse flow, offering integrated solution efficiency.
- Marine Standard Compliance: Manufactured to meet CB/T4303 specifications, ensuring acceptance in marine projects and inspections.
- Size Range Flexibility: Available in DN80, DN100, DN125, and DN150 sizes, covering common compressed air line diameters on vessels.
- Robust Material Selection: Body and disc materials include cast steel, stainless steel, or aluminum alloys, chosen for corrosion resistance and strength.
- Flanged Connection: Standard flanged ends facilitate secure installation and compatibility with marine piping systems.
- Reliable Sealing: Utilizes rubber or PTFE sealing rings to ensure tight closure and minimal leakage under varying pressures.
- Simple Operation: Manual handle operation allows for quick open/close actions; optional lockable handles or position indicators available.
- Wide Operating Range: Suitable for compressed air services with temperatures from -20°C to 150°C and pressure ratings typically PN10 to PN16.
- Low Maintenance: Designed for minimal upkeep; the disc and seal assembly are accessible for inspection or replacement if needed.
The technical specifications and performance advantages of this valve are detailed below. Key parameters ensure it matches the operational demands of marine compressed air systems, which include air starters, control air, instrument air, and general service air.
| Parameter | Typical Value / Range | Notes |
|---|---|---|
| Standard | CB/T4303 | Chinese marine valve standard |
| Size Range (DN) | 80, 100, 125, 150 | Nominal diameter |
| Pressure Rating | PN10, PN16 | Common design pressures |
| Connection Type | Flanged | RF flange faces typical |
| Body Material | Cast Steel, Stainless Steel | Other materials customizable |
| Disc Material | Stainless Steel, Aluminum | Corrosion-resistant options |
| Seal Material | Rubber, PTFE | For tight sealing |
| Operating Temp. | -20°C to 150°C | For compressed air service |
| Actuation | Manual Handle | Optional lockable handle |
The advantages for customers are clear: space and cost savings from the combined valve functions, reduced installation time due to straightforward flanged mounting, and enhanced system safety through automatic backflow prevention. Marine engineers and procurement specialists benefit from a component that simplifies specification, meets regulatory standards, and performs reliably in the challenging marine atmosphere.
Shanghai Zhibang Valve Manufacture Co., Ltd supports your projects with a proven track record. Since our establishment in 2016, we have grown to achieve an annual export value between US$1 Million and US$1.5 Million, supplying valves to diverse markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Mid East, and Eastern Asia. Our ISO9001 certification underpins our commitment to consistent quality. With major shipment ports in Shanghai, Guangzhou, Hongkong, and Beijing, we ensure timely delivery to your location. Choose our CB/T4303 Compliant Marine Butterfly Check Valve for a reliable, standards-compliant solution that enhances your compressed air system's integrity and performance.
FAQ
1. What is the primary purpose of a butterfly check valve in compressed air systems?
This valve serves two main functions: it regulates or isolates airflow via the butterfly disc, and it prevents reverse flow (backflow) using an integrated check mechanism. This dual functionality protects downstream equipment and maintains system pressure direction.
2. Does CB/T4303 compliance ensure acceptance in international marine projects?
CB/T4303 is a recognized Chinese standard for marine valves. Many international shipbuilding and repair projects accept valves meeting this standard, especially when specified by designers or required for vessels operating under certain regulatory frameworks. It indicates the valve is built for marine service conditions.
3. Can this valve be used with other gases or fluids besides compressed air?
Its design is optimized for compressed air service. Use with other media should be evaluated based on compatibility with materials, sealing, and pressure/temperature ratings. Consult with our technical team for specific application inquiries.
4. What are the available actuation options?
The standard configuration includes a manual handle for direct operation. Optional features such as lockable handles to secure the valve position or visual position indicators can be provided upon request. Automated actuation (electric or pneumatic) may be customizable for special projects.
5. How does the check function work within the butterfly valve?
The check mechanism typically involves a spring-loaded or weighted arrangement that allows flow in the forward direction but closes automatically if reverse flow attempts to occur. This is integrated into the valve body, often associated with the disc or seat design.
6. What maintenance is typically required?
Regular inspection of the sealing surfaces and occasional lubrication of the operating mechanism are recommended. The design aims for low maintenance; seal replacement kits are available if needed after extended service.
7. Are special flanges or gaskets required for installation?
The valve comes with standard flanged ends matching common piping flange dimensions (e.g., PN10/16 flanges). Standard gaskets suitable for compressed air can be used. Installation follows typical bolted flange procedures.
8. Can I request a specific material combination for corrosive environments?
Yes. While cast steel and stainless steel are standard, we can discuss alternative materials like higher-grade stainless steels or special coatings to address specific corrosive conditions, such as in offshore or high-humidity marine settings.
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