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Help CenterMarine Check Valve Dual Plate 150LB-300LB Cast Steel NBR for Fuel Oil Transfer Systems
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016, is a professional manufacturer specializing in high-performance industrial valves. Our Marine Check Valve Dual Plate 150LB-300LB Cast Steel NBR is engineered specifically for fuel oil transfer systems, offering reliable backflow prevention and exceptional durability in demanding marine environments. With a robust cast steel body, resilient NBR sealing, and a compact dual-plate design, this valve minimizes pressure drop and reduces water hammer, ensuring smooth and efficient operation. Backed by our ISO9001 quality management system and years of export experience, each valve delivers consistent performance and long service life.
Product Features & Technical Specifications
- Dual Plate Design: Lightweight, low pressure drop, rapid closure, and reduced water hammer effect compared to traditional swing check valves.
- Cast Steel Body: High strength and excellent corrosion resistance for marine and industrial applications. Available in WCB, WCC, or LCB upon request.
- NBR Seat/Seal: Nitrile Butadiene Rubber provides excellent resistance to fuel oils, lubricating oils, and hydrocarbons within a temperature range of -10°C to +80°C.
- Pressure Ratings: Available in Class 150LB and 300LB, suitable for medium-pressure fuel oil transfer systems.
- Flanged Connection: ANSI B16.5 raised face flanges for easy installation and reliable sealing.
- Compact & Lightweight: The dual-plate construction reduces overall weight and installation space, ideal for tight piping layouts on ships or offshore platforms.
- Bi-directional Capability: Can be installed in vertical or horizontal pipelines with proper orientation.
Key Specifications
| Parameter | Details |
| Body Material | Cast Steel (WCB / WCC / LCB optional) |
| Pressure Rating | 150LB / 300LB (ASME Class 150/300) |
| Seal Material | NBR (Nitrile Butadiene Rubber) |
| Connection Type | Flanged, ANSI B16.5 RF |
| Size Range | 2" – 24" (customizable upon request) |
| Applicable Media | Fuel oil, diesel, lubricating oil, water, and non-aggressive fluids |
| Operating Temperature | -10°C to +80°C (NBR); alternatives available for higher temperatures |
| Design Standard | API 594 / BS 1868 (available upon request) |
Why Choose Our Dual Plate Check Valve?
- Reliable Backflow Prevention: The dual-plate mechanism ensures quick closure to prevent reverse flow, protecting pumps and pipeline systems.
- Low Pressure Drop: Streamlined disc design reduces turbulence, saving energy in your fuel oil circulation system.
- Marine-Grade Durability: Cast steel body with epoxy coating (optional) withstands harsh marine atmospheres.
- Easy Maintenance: No external moving parts, and the modular design allows quick replacement of seat rings.
- Cost-Effective: Long service life reduces replacement frequency, offering excellent total cost of ownership.
Our factory in Shanghai produces every valve under strict quality control. Each unit undergoes hydrostatic and pneumatic testing per API standards. We offer flexible sizing, pressure ratings, and end connections to match your specific system requirements.
Trust & Reliability
With ISO9001 certification and an annual export value of US$1 million to US$1.5 million, Shanghai Zhibang Valve has built a solid reputation among global clients. We serve markets across North America, South America, Europe, Southeast Asia, Africa, the Middle East, Oceania, and domestic China. Our valves are shipped from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery worldwide. Hundreds of satisfied customers rely on our dual plate check valves for fuel oil transfer systems, tanker operations, and offshore platforms. We welcome OEM/ODM requests and offer customized solutions to meet your exact specifications. Contact us today for a competitive quote and professional technical support.
Frequently Asked Questions (FAQ)
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Q: What media are suitable for this check valve?
A: The valve is primarily designed for fuel oil, diesel, and lubricating oils. It can also handle water and other non-corrosive fluids compatible with NBR. -
Q: What is the maximum working pressure?
A: For Class 150LB, the maximum working pressure is approximately 285 psi (19.6 bar) at ambient temperature. For Class 300LB, it is 740 psi (51 bar). Please refer to ASME B16.5 for exact ratings at elevated temperatures. -
Q: Can the valve be installed vertically?
A: Yes, the dual plate check valve can be installed in both horizontal and vertical pipelines (flow direction upward). For vertical downward flow, a spring-assisted model may be required. -
Q: Is the valve suitable for steam service?
A: Standard NBR seal is not recommended for steam. We can supply alternate seat materials such as Viton or PTFE for higher temperature and steam applications upon request. -
Q: Do you offer a test certificate?
A: Yes, we provide material certificates, hydrostatic test reports, and other documentation as required. Our ISO9001 quality system ensures full traceability. -
Q: What sizes and pressure classes are typically in stock?
A: Common sizes from 2" to 12" in Class 150LB are usually in stock. Larger sizes and Class 300LB may require short lead times. Please contact our sales team for current stock availability. -
Q: Can I get a sample before placing a bulk order?
A: Yes, we provide sample orders for evaluation. The sample cost is negotiable and will be deducted from the first bulk order. -
Q: How do I select the right check valve for my fuel oil system?
A: Consider factors such as pipeline size, operating pressure and temperature, medium type, and installation orientation. Our technical team can assist you with sizing and material selection to ensure optimal performance.
Shanghai Zhibang Valve Manufacture Co., Ltd. – Your trusted partner for marine and industrial valves. Submit your inquiry today to get a tailored solution for your fuel oil transfer system.
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