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CB/T4303 Marine Check Valve in 316 Stainless Steel for OEM Shipbuilding Applications
Product Spotlights
CB/T4303 compliant marine check valve made from corrosion-resistant 316 stainless steel, ideal for OEM shipbuilding. Features swing disc design, multiple pressure ratings (PN10-PN40), sizes from DN15-DN500, and optional PTFE seats. Ensures reliable backflow prevention, reduces maintenance costs, and supports global maritime standards with customization available.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Standard:
CB/T4303 Marine Standard
Application:
Other, OEM Shipbuilding
Material:
316 Stainless Steel
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
CB/T4303 Marine Standard
Application
Other, OEM Shipbuilding
Material
316 Stainless Steel
Connection Type
Flanged (Standard), Threaded optional
Pressure Rating
PN10, PN16, PN25, PN40 available
Temperature Range
-20°C to 200°C
Valve Type
Swing Check Valve
Seat Material
316 Stainless Steel or PTFE
Size Range
DN15 to DN500
Customization
Available upon request
As a leading manufacturer specializing in marine valve solutions since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance CB/T4303 Marine Check Valve crafted from premium 316 Stainless Steel. Engineered specifically for the rigorous demands of OEM shipbuilding, this valve is a cornerstone for ensuring system integrity and preventing backflow in critical marine piping networks. Our commitment to quality, backed by ISO9001 certification, ensures every valve meets the exacting standards required for safe and reliable maritime operations worldwide.
This marine check valve is designed to offer superior durability and corrosion resistance, making it an ideal choice for handling seawater, ballast, fuel oil, and other marine fluids. Its robust construction ensures long service life even in the harshest saltwater environments, providing shipbuilders and system integrators with a dependable component they can trust.
Key Features & Technical Advantages:
- Premium 316 Stainless Steel Construction: Offers exceptional resistance to pitting and crevice corrosion in chloride-containing environments like seawater, far surpassing the performance of 304 stainless steel.
- Compliance with CB/T4303 Marine Standard: Specifically designed and tested to meet Chinese national standards for shipbuilding valves, ensuring compatibility and reliability in marine applications.
- Optimized Swing Disc Design: The internal swing disc mechanism ensures quick, positive sealing with minimal pressure drop, effectively preventing reverse flow and protecting pumps and other equipment.
- Versatile Pressure Ratings: Available in multiple pressure classes (PN10, PN16, PN25, PN40) to suit various system requirements within shipboard piping.
- Broad Size Range: We supply a comprehensive range from DN15 to DN500, catering to everything from auxiliary lines to main seawater systems.
- Flexible End Connections: Standard flanged connections for easy integration, with threaded (NPT, BSP) options available upon request for specific OEM needs.
- Enhanced Seal Options: Standard metal-to-metal seat (316SS) provides robust sealing; a PTFE soft seat option is available for bubble-tight shut-off in critical applications.
Technical Specifications Table:
| Parameter | Specification |
|---|---|
| Product Standard | CB/T4303 (Marine Valve Standard) |
| Body & Disc Material | ASTM A351/A351M CF8M (316 Stainless Steel) |
| Seat Material | Standard: 316 Stainless Steel | Optional: PTFE |
| Pressure Rating | PN10, PN16, PN25, PN40 (Customizable) |
| Temperature Range | -20°C to +200°C |
| Size Range (Nominal Diameter) | DN15 (1/2") to DN500 (20") |
| Connection Type | Flanged (RF, FF), Threaded (NPT, BSP) optional |
| Flow Direction | Horizontal or Vertical (Flow bottom to top) |
| Applicable Fluid | Seawater, Fresh Water, Ballast Water, Fuel Oil, Lubricating Oil, Air |
Benefits for Your OEM Shipbuilding Projects:
- Reliability & Safety: Prevents dangerous backflow scenarios, protecting expensive pumps, compressors, and system components, thereby enhancing overall vessel safety.
- Reduced Maintenance & Lifecycle Cost: The superior corrosion resistance of 316SS minimizes scaling, pitting, and degradation, leading to fewer replacements and lower long-term operational costs.
- Streamlined Procurement: As a manufacturer with an annual export value between US$1-1.5 million, we have the capacity and experience to support large-scale OEM orders, ensuring consistent supply from ports like Shanghai, Guangzhou, Hong Kong, and Beijing.
- Global Compliance: Suitable for projects targeting our main markets across North America, South America, Europe, Asia, Africa, and Oceania, meeting international maritime expectations.
- Customization Support: We understand that OEM projects have unique specifications. Modifications in dimensions, pressure ratings, testing protocols, and markings are available to align with your specific design requirements.
With nearly a decade of manufacturing expertise and a firm commitment to the ISO9001 quality management system, Shanghai Zhibang Valve provides not just a product, but a reliable partnership. Our valves are trusted by shipyards and marine equipment suppliers across the globe, from Eastern Europe to Southeast Asia. Choosing our CB/T4303 Marine Check Valve means investing in proven performance, robust construction, and the peace of mind that comes from working with an established supplier dedicated to the marine industry. Contact us today to discuss your specific requirements, request samples, or place an order for your next shipbuilding project.
Frequently Asked Questions (FAQ)
-
Q: What is the main advantage of using 316 Stainless Steel over 304 for this marine check valve?
A: 316 Stainless Steel contains molybdenum, which significantly enhances its resistance to corrosion from chlorides, such as those found in seawater. This makes it far more suitable and durable for long-term marine service compared to 304 stainless steel. -
Q: Does this valve comply with international marine standards, or only CB/T4303?
A: Our valve is manufactured primarily to the CB/T4303 standard, which is widely recognized and accepted in shipbuilding, particularly in Asian markets. For specific international standard compliance (e.g., ASTM, DIN, JIS), please contact our sales team as customization is possible. -
Q: Can this valve be installed in vertical pipelines?
A: Yes, it can be installed in vertical lines. However, for vertical installation, the flow direction must be from the bottom to the top (upward flow) to allow the swing disc to open properly under flow pressure. -
Q: What is the lead time for a standard DN100, PN16 flanged valve?
A: For standard configurations, we typically maintain stock for common sizes. Lead times can range from 15-30 days for bulk OEM orders, depending on quantity and specific port of shipment requirements. -
Q: Are testing reports and certificates provided with the order?
A: Yes, as an ISO9001 certified manufacturer, we provide standard material test reports and factory acceptance test reports. Specific third-party inspection or certification can be arranged upon request. -
Q: Is customization available for different flange standards or face-to-face dimensions?
A: Absolutely. We frequently work with OEM clients to customize valves according to specific flange standards (ANSI, DIN, JIS, etc.) and non-standard dimensions. Please provide your detailed specifications for a quotation. -
Q: What fluids is this valve suitable for besides seawater?
A: It is well-suited for a wide range of shipboard fluids including fresh water, ballast water, fuel oil (diesel), lubricating oil, compressed air, and other non-aggressive chemical media compatible with 316SS. -
Q: Do you offer a soft-seat version for zero-leakage applications?
A: Yes, we offer an optional version with a PTFE (Teflon) soft seat insert, which provides bubble-tight shut-off and is ideal for applications where minimal leakage is critical.
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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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