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Help CenterCB/T4303 Standard Check Valve, DN300-DN600, Supplied With Full Material Certification
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-quality, reliable fluid control solutions for global industrial applications. We are proud to introduce our CB/T4303 Standard Check Valve, a product engineered to ensure unidirectional flow and prevent backflow in critical pipeline systems. With our ISO9001 certified manufacturing processes, we guarantee consistent quality and performance for valves ranging from DN300 to DN600. This valve is supplied with full material certification, offering our B2B clients complete traceability and peace of mind for their projects in demanding sectors like marine engineering and industrial plants.
Our CB/T4303 Check Valve is designed for durability and dependable operation. The robust construction minimizes pressure drop and water hammer effects, protecting your overall piping system. Key features include:
- Standard Compliance: Manufactured strictly in accordance with the CB/T4303 standard, ensuring compatibility and reliability for marine and specific industrial applications.
- Full Material Traceability: Each valve is supplied with complete material certification, detailing chemical composition and mechanical properties, which is crucial for quality audits and project specifications.
- Wide Size Range: Available in nominal diameters from DN300 to DN600, catering to main pipeline and large-diameter system requirements.
- Robust Design: Features a sturdy body and internal components designed to withstand continuous operation and pressure fluctuations.
- Versatile Installation: Typically designed with flanged ends for secure and leak-proof connection to piping systems.
- Reliable Sealing: Utilizes precision-machined seats (metal or optional soft seating) to ensure tight shut-off and prevent reverse flow effectively.
The valve offers significant advantages for engineering contractors and plant operators. By preventing backflow, it safeguards pumps and other equipment from damage, reduces maintenance costs, and enhances system safety. The availability of full material documentation simplifies compliance with international procurement and regulatory standards, speeding up project approval processes.
Below is a summary of typical technical specifications. Please note that specific parameters like pressure class and exact material grade can be customized upon request.
| Parameter | Details / Options |
|---|---|
| Product Standard | CB/T4303 |
| Nominal Diameter (DN) | 300, 350, 400, 450, 500, 600 mm |
| Pressure Rating | PN10, PN16, PN25, Class 150, Class 300 (Customizable) |
| Body Material | Cast Steel (WCB, LCB), Ductile Iron |
| Disc & Seat Material | Stainless Steel / Metal Seated; Soft Seat (NBR, EPDM) Optional |
| End Connection | Flanged (RF, FF), dimensions per relevant standards |
| Operation Mode | Automatic (Flow-actuated) |
| Applicable Medium | Water, Oil, Gas, Steam (Material dependent) |
Backed by our annual export value ranging between US$1 Million to US$1.5 Million, Shanghai Zhibang has established a strong reputation for reliability across diverse markets including North America, Southeast Asia, Europe, and Africa. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics. Choosing our CB/T4303 Check Valve means partnering with a manufacturer committed to quality documentation and proven export performance. This valve is a strategic component for ensuring system integrity—contact us today to discuss your specifications and receive a competitive quotation.
Frequently Asked Questions (FAQ)
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Q: What is the CB/T4303 standard?
A: CB/T4303 is a Chinese national professional standard (船舶行业标准) primarily for marine valves. It specifies requirements for design, manufacture, testing, and inspection of check valves used in shipbuilding and marine engineering systems. -
Q: Why is full material certification important?
A: Full material certification (Mill Test Certificate - MTC) provides verified data on the chemical and physical properties of the valve's raw materials. It is essential for quality assurance, traceability, and meeting the stringent documentation requirements of many engineering, marine, and oil & gas projects. -
Q: Can this valve be used in applications other than marine?
A: Yes. While designed to the marine standard CB/T4303, this check valve is suitable for any industrial piping system requiring reliable backflow prevention, such as water treatment plants, power generation, and chemical processing, provided the material is compatible with the medium. -
Q: What pressure classes are available for DN300-DN600 sizes?
A> We typically offer common pressure ratings like PN10/16/25 or Class 150/300. The available pressure class for a specific size depends on the material and design. Please provide your required pressure rating for a precise recommendation. -
Q: Are flanges included with the valve?
A: The valve body comes with integrated flanges as per its design. Separate pipeline flanges for connection are not included and must be sourced separately to match your piping system. -
Q: What is the lead time for an order of DN400 valves?
A: Lead time varies based on order quantity, specific material grade, and pressure class. Generally, for standard configurations, production lead time ranges from 30 to 60 days. We provide a confirmed schedule upon order receipt. -
Q: Do you offer customization for trim materials or special coatings?
A: Yes, customization is possible. Options for different seat materials (like PTFE), disc coatings, or internal epoxy coatings can be discussed and provided based on your application needs. -
Q: What are the packaging and shipping terms?
A: Valves are securely packaged in wooden cases to prevent damage during transit. We ship FOB from ports like Shanghai, Guangzhou, or Hong Kong. Other Incoterms can be negotiated based on your preference.
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