Contact Platform Support
Help CenterMarine Engine Room Pump Protection Valve, Installs in Discharge Line per GB/T1855
Product Spotlights
Related Products
-
Marine Pump Stop Check Valve With Mill Test Report, Manufactured to GB/T1855NegotiableMOQ: 1 Unit -
Precision Machined GB/T1855 Stop Check Valve, Cast Iron Body, PN1.0MPa Pressure ClassNegotiableMOQ: 1 Unit
-
GB/T1855 Marine Valve for Pump Suction Lines, Prevents Backflow on Pump ShutdownNegotiableMOQ: 1 Unit
-
GB/T1855 Cast Iron Stop Check Valve, DN50-DN200, PN1.0MPa, Flanged ConnectionNegotiableMOQ: 1 Unit
-
GB/T1855 Standard Cast Iron Stop Check Valve, PN1.0MPa Pressure Rating, Soft Seal DesignNegotiableMOQ: 1 Unit
As a specialized manufacturer with a focus on marine fluid control solutions since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. presents its engineered Marine Engine Room Pump Protection Valve. Designed specifically for installation in the discharge line and manufactured in strict compliance with the GB/T1855 standard, this valve is a critical component for safeguarding your vessel's pumping systems against backflow, water hammer, and pressure surges. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers reliable performance in the demanding marine environment, protecting expensive pumps and maintaining operational continuity for shipowners and operators worldwide.
This valve serves as a first line of defense in your engine room's piping network. Its core function is to allow the free flow of fluid in the intended discharge direction while automatically and swiftly closing to prevent reverse flow. This action is crucial for several reasons:
- Pump Protection: Prevents backflow from entering the pump, which can cause cavitation, impeller damage, and motor overload.
- System Integrity: Maintains prime in the pump and prevents draining of the discharge line.
- Safety Enhancement: Mitigates the risk of water hammer—a pressure surge that can damage pipes, fittings, and other components.
- Energy Efficiency: By ensuring unidirectional flow, it helps pumps operate at their designed efficiency.
Key Features & Technical Advantages:
Our Marine Pump Protection Valve incorporates several design and material features tailored for maritime applications:
- Robust Construction: The valve body is typically crafted from high-grade cast steel, ductile iron, or bronze, selected for its excellent corrosion resistance against seawater and bilge water. Internal components like the disc and hinge are made from stainless steel or other corrosion-resistant alloys.
- Swift, Automatic Closure: Utilizes a spring-assisted or swing-type mechanism that ensures rapid closure upon flow stoppage or reversal, minimizing the volume of reverse flow.
- Low Pressure Drop Design: The internal flow path is engineered to minimize resistance during normal forward flow, reducing the pump's workload and energy consumption.
- Easy Maintenance: Many models feature a bolted cover or access port, allowing for internal inspection, cleaning, or part replacement without removing the entire valve from the pipeline.
- Compliance & Traceability: Manufactured per the GB/T1855 standard for ship valves, ensuring dimensional accuracy, material quality, and performance criteria meet recognized maritime industry specifications.
Technical Specifications Overview:
| Standard | GB/T1855 (Chinese National Standard for Ship Valves) |
| Installation | Discharge Line of Marine Engine Room Pumps |
| Pressure Rating (PN) | Commonly available: PN10, PN16, PN25, PN40 (Customizable) |
| Size Range (DN) | Typically from DN50 (2") to DN300 (12") and larger upon request |
| End Connection | Flanged (ASME/GB/JIS/DIN standards), Threaded (NPT/BSP) |
| Body Material | Cast Steel WCB, Ductile Iron, Bronze, Stainless Steel (optional) |
| Seat Material | Metal-to-metal or resilient seal (NBR, EPDM, Viton) options |
| Temperature Range | Standard: -20°C to 120°C. Extended ranges available. |
Application Scenarios & Customer Benefits:
This valve is indispensable across various marine systems:
- Bilge Pump Systems: Prevents backflow into the bilge well, maintaining pump prime and ensuring effective water removal.
- Ballast Pump Systems: Protects pumps during ballasting/deballasting operations, crucial for vessel stability.
- Firefighting Pump Systems: Ensures fire main pressure is maintained and prevents backflow contamination.
- Cooling Water Circuits: Protects seawater and freshwater cooling pumps from reverse flow.
- General Service Pumps: Used in fuel oil transfer, lubricating oil, and other auxiliary pump discharge lines.
For you, the operator or shipyard, the benefits translate into reduced maintenance costs, extended pump lifespan, enhanced system reliability, and improved overall vessel safety. It is a cost-effective insurance policy for your critical pumping assets.
Trust & Proven Global Delivery:
Shanghai Zhibang Valve is not just a supplier; we are your partner in maritime reliability. Our ISO9001 certified manufacturing processes guarantee consistent quality. With an annual export value between US$1 Million and US$1.5 Million, our products have earned the trust of clients across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We ship efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to shipyards and ports worldwide. Choosing our GB/T1855 compliant Marine Engine Room Pump Protection Valve means selecting a component backed by rigorous manufacturing standards and proven in global maritime operations. Protect your investment and ensure uninterrupted vessel performance. Contact us today for detailed specifications, pricing, and to discuss your specific application requirements.
Frequently Asked Questions (FAQ):
-
Q: Why is compliance with GB/T1855 important for this valve?
A: GB/T1855 is a Chinese national standard specifically for valves used on ships. It defines requirements for materials, dimensions, pressure ratings, and testing, ensuring the valve is fit for purpose in the marine environment and is widely recognized in international shipbuilding and repair, particularly for vessels built or serviced in regions following these standards. -
Q: Can this valve be used for fluids other than water?
A: Yes, depending on the material configuration. While standard models are suited for seawater, bilge water, and ballast water, we can configure valves with appropriate body, seal, and trim materials (e.g., stainless steel, special alloys) to handle oils, chemicals, or other fluids. Please specify your medium during inquiry. -
Q: How do I select the correct pressure rating (PN) for my application?
A: The required PN rating should be equal to or greater than the maximum possible pressure in the discharge line under all operating conditions, including pump shut-off head. Our technical team can assist you in selecting the appropriate rating based on your system parameters. -
Q: What is the lead time for an order?
A: Lead times vary based on size, material, and order quantity. Standard configurations in common sizes may be available from stock. For custom specifications or large orders, typical production lead times range from 4 to 8 weeks. We provide estimated timelines upon order confirmation. -
Q: Does the valve require regular maintenance?
A: These are generally low-maintenance devices. However, periodic inspection is recommended as part of the vessel's planned maintenance system. This involves checking for free movement of the disc, signs of wear or corrosion, and integrity of seals. Our design often facilitates easy in-line inspection. -
Q: What flange standards do you offer?
A: We commonly supply valves with flanges conforming to GB, ASME B16.5, JIS, or DIN standards to match existing pipeline flanges. It is crucial to specify your required flange standard, pressure class, and facing (RF, FF) when ordering. -
Q: Is the valve suitable for vertical installation?
A: Most swing check valve designs are suitable for horizontal installation. For vertical lines with upward flow, specific designs (e.g., spring-loaded lift check valves) are more appropriate. Please inform us of your installation orientation so we can recommend the correct valve type. -
Q: Do you provide documentation with the valves?
A: Yes. Each shipment typically includes essential documentation such as a material certificate, product test report (including pressure test), and a manual. Certificates of Conformity to GB/T1855 can be provided upon request.
Send Inquiry to This Supplier
You May Also Like
-
Cast Iron Stop Check Valve Supplied With Full Technical Documentation and Mill Test ReportNegotiableMOQ: 1 Unit
-
GB/T1855 Cast Iron Stop Check Valve With Mill Test Report, Standard DN50 to DN200 SizesNegotiableMOQ: 1 Unit
-
Heavy-Duty Cast Iron Stop Check Valve for Pump Protection, Compliant With GB/T1855 StandardNegotiableMOQ: 1 Unit
-
GB/T1855-1993 Standard Cast Iron Suction Stop Check Box Valve for Marine Pump ProtectionNegotiableMOQ: 1 Unit
-
GB/T1855 Cast Iron Stop Check Valve for Marine Engine Cooling Water SystemsNegotiableMOQ: 1 Unit
-
GB/T1855 Cast Iron Stop Check Valve With 18-Month Warranty Against Manufacturing DefectsNegotiableMOQ: 1 Unit
-
Stop Check Valve for Industrial Boiler Feed Water Lines, Cast Iron GB/T1855 StandardNegotiableMOQ: 1 Unit
-
Cast Iron Suction Stop Check Box Valve for Seawater Cooling Systems, DN80-DN150 SizesNegotiableMOQ: 1 Unit
-
Marine Suction Stop Check Valve With Combined Stop and Check Function, GB/T1855-1993 CompliantNegotiableMOQ: 1 Unit
-
Valve for Cargo Oil Pump Protection on Vessels, Meets GB/T1855-1993 Marine StandardNegotiableMOQ: 1 Unit
