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CB/T4303 Marine Check Valve for Fuel Oil Transfer Systems on Vessels
Product Spotlights
CB/T4303 standard marine check valve designed for vessel fuel oil transfer systems. Prevents dangerous backflow to protect pumps and equipment. Features robust cast steel/stainless steel construction, low pressure drop design, and flanged connections per international standards. Ensures operational safety, system integrity, and compliance with marine regulations. Customizable materials and sizes available.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Application:
Other, Fuel Oil Transfer Systems on Vessels
Product Standard:
CB/T4303
Valve Type:
Check Valve (Non-Return Valve)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Fuel Oil Transfer Systems on Vessels
Product Standard
CB/T4303
Valve Type
Check Valve (Non-Return Valve)
Connection Type
Flanged (Standard), Threaded optional
Body Material
Cast Steel, Ductile Iron, Stainless Steel optional
Seat Material
Stainless Steel, NBR, PTFE optional
Pressure Rating
PN10, PN16, PN25, Class150, Class300
Size Range
DN15 to DN500 (1/2“ to 20“)
End Connection Standard
JIS, ANSI, DIN, GB, BS
Suitable Medium
Fuel Oil, Marine Diesel Oil (MDO), Heavy Fuel Oil (HFO)
As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-performance marine valves that meet stringent international standards. Our CB/T4303 Marine Check Valve is engineered specifically for the demanding environment of fuel oil transfer systems on vessels, ensuring safe, reliable, and efficient one-way flow control. With years of experience exporting to global markets including North America, Europe, and Southeast Asia, we understand the critical need for durable and compliant components in marine applications. This valve is designed to prevent backflow, protect sensitive equipment, and maintain system integrity, making it an essential component for shipbuilders, repair yards, and fleet operators worldwide.
The core value of this check valve lies in its robust construction and adherence to the CB/T4303 standard, a recognized specification for shipbuilding fittings. We utilize premium materials and advanced manufacturing processes to create a product that withstands the corrosive marine atmosphere, pressure fluctuations, and the abrasive nature of fuel oils. Its reliable performance translates directly into operational safety, reduced maintenance downtime, and long-term cost savings for our clients.
Key Features & Technical Advantages:
- Standard Compliance: Manufactured in strict accordance with the CB/T4303 standard, ensuring compatibility and acceptance in international shipbuilding and repair projects.
- Robust Construction: The valve body is typically crafted from high-grade cast steel or ductile iron, offering excellent strength and resistance to impact and pressure shocks common in marine fuel systems.
- Reliable Sealing: Features a precision-machined seat paired with a resilient sealing disc (often stainless steel with NBR or PTFE seal). This design ensures tight shut-off against backflow, minimizing the risk of fuel contamination or system pressure loss.
- Low Pressure Drop: Engineered with a streamlined flow path to minimize turbulence and pressure drop across the valve, contributing to overall fuel transfer efficiency.
- Versatile Mounting: Available with flanged ends as standard, conforming to common standards like JIS, ANSI, DIN, or GB. Threaded connections are also available upon request for specific system layouts.
- Material Options: While cast steel is standard, we offer alternative body materials such as stainless steel (CF8/CF8M) for enhanced corrosion resistance in particularly aggressive environments or for specific fuel types.
- Maintenance-Friendly Design: Certain models allow for in-line maintenance or seat replacement without removing the entire valve from the pipeline, significantly reducing service time and costs.
Technical Specifications:
| Parameter | Specification |
| Product Standard | CB/T4303 |
| Nominal Size Range | DN15 - DN500 (1/2" - 20") |
| Pressure Rating | PN10, PN16, PN25 / Class150, Class300 |
| Suitable Medium | Marine Fuel Oil, Diesel Oil (MDO), Heavy Fuel Oil (HFO) |
| Operating Temperature | -20°C to +150°C (depending on seal material) |
| End Connection | Flanged (Standard), Threaded (Optional) |
| Body Material (Typical) | Cast Steel WCB, Ductile Iron, Stainless Steel (Optional) |
| Disc/Seal Material | Stainless Steel with NBR/PTFE, All Stainless Steel |
| Flow Direction | Horizontal or Vertical (as per installation) |
Benefits for Your Operations:
- Enhanced Safety: Prevents dangerous backflow of fuel, protecting pumps, filters, and tanks, thereby reducing fire hazards and operational risks.
- System Protection: Shields upstream equipment from pressure surges and reverse flow, extending the lifespan of critical system components.
- Operational Reliability: Ensures consistent, unidirectional fuel flow, which is vital for the stable operation of engines, boilers, and other fuel-consuming machinery on board.
- Regulatory Compliance: Helps vessel operators meet the stringent safety and equipment standards required by classification societies and maritime authorities.
- Cost-Effective Solution: Durable construction and reliable performance minimize unexpected failures, leading to lower lifecycle costs through reduced repairs and downtime.
Shanghai Zhibang Valve's commitment to quality is backed by our ISO9001 certified manufacturing processes and an annual export value reflecting our global reach and client trust. Our valves are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics to your location. Serving diverse markets from Northern Europe to Oceania, we have proven our capability to meet the specific demands of international marine projects. Choosing our CB/T4303 Marine Check Valve means selecting a component built for performance, backed by a reliable manufacturer with a solid track record. For a reliable safeguard in your vessel's fuel oil transfer system, contact us today to discuss your specifications or request a quotation.
Frequently Asked Questions (FAQ)
-
Q: What is the main purpose of this check valve in a marine fuel oil system?
A: Its primary function is to allow fuel oil to flow in one direction only and automatically prevent reverse flow (backflow). This protects pumps, meters, and other equipment, maintains system pressure, and prevents contamination between different fuel tanks or lines. -
Q: Is the CB/T4303 standard recognized internationally?
A: Yes, CB/T standards are Chinese national standards for shipbuilding, widely recognized and accepted in international marine industries, especially in projects involving Chinese shipyards or vessels built to these specifications. They are often comparable to other international norms. -
Q: Can this valve handle both Heavy Fuel Oil (HFO) and Marine Diesel Oil (MDO)?
A: Absolutely. The valve is constructed with materials compatible with both HFO and MDO. The selection of appropriate seat seal material (like PTFE for wider chemical resistance) can be customized based on the specific fuel type and operating temperature. -
Q: What are the common installation orientations for this valve?
A: This type of swing check valve can typically be installed in both horizontal and vertical pipelines. However, for vertical installation with upward flow, it is crucial to confirm the specific design suitability with our technical team to ensure proper disc movement and sealing. -
Q: Do you offer valves with different flange standards?
A: Yes. While we commonly supply valves with standard flanges, we can manufacture them to match various international flange standards such as ANSI, JIS, DIN, or BS, based on your piping system requirements. Please specify your needed standard when inquiring. -
Q: What is the lead time for an order of these valves?
A: Lead time depends on the size, material, pressure rating, and quantity. Standard configurations often have shorter lead times. We provide accurate production schedules upon receipt of your detailed specifications. Our efficient logistics from multiple ports help expedite delivery. -
Q: Are spare parts like seal kits available?
A: Yes, we provide spare part kits for maintenance purposes. It is recommended to order relevant spare parts along with the valves to ensure quick turnaround during scheduled maintenance, minimizing vessel downtime. -
Q: How does your ISO9001 certification benefit me as a buyer?
A: Our ISO9001 certification ensures that our entire manufacturing process—from material sourcing and machining to assembly, testing, and packaging—follows a documented quality management system. This provides you with confidence in consistent product quality, traceability, and reliable performance.
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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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