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GB/T1855 Marine Stop Check Valve For Freshwater Systems, DN50 DN200 PN1.0MPa
Product Spotlights
Dual-function marine stop check valve for freshwater systems, compliant with GB/T1855. Features DN50 to DN200 size range and PN1.0MPa pressure rating. Combines manual shut-off with automatic backflow prevention in one unit, saving space and cost. Constructed with marine-suitable materials for durability. Ideal for shipyards and vessel operators seeking reliable flow control and system protection.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine Freshwater Systems
Flow Direction:
Other, Unidirectional
Product Standard:
GB/T1855
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine Freshwater Systems
Flow Direction
Other, Unidirectional
Product Standard
GB/T1855
Nominal Diameter (DN)
DN50 to DN200
Pressure Rating (PN)
PN1.0MPa
Valve Type
Stop Check Valve
Connection Type
Flanged (Standard)
Body Material
Cast Iron / Ductile Iron
Seat Material
Rubber / EPDM
Suitable Medium
Fresh Water
As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance valves for demanding marine applications. Our GB/T1855 Marine Stop Check Valve is engineered specifically for freshwater systems onboard vessels, providing reliable backflow prevention and flow control. With over seven years of industry experience since our establishment in 2016, we understand the critical need for durable and dependable valve solutions in marine environments. This valve is designed to meet the rigorous standards of shipbuilding and offshore industries, ensuring safe and efficient operation of your vessel's freshwater supply.
The valve combines the functions of a stop valve and a check valve, offering superior control and protection for your piping system. Its robust construction and precise engineering make it an ideal choice for shipyards, marine engineers, and vessel operators worldwide. We export to major markets including North America, Southeast Asia, Europe, and Africa, with annual export values consistently ranging between US$1 million and US$1.5 million, demonstrating our global reach and customer trust.
Key Features & Technical Advantages:
- Dual-Function Design: Acts as both a shut-off valve and a non-return check valve, saving space and installation costs in compact marine engine rooms and piping networks.
- Robust Pressure Handling: Rated for PN1.0MPa (10 bar), suitable for standard freshwater system pressures on various types of vessels, from cargo ships to passenger ferries.
- Size Range Flexibility: Available in nominal diameters from DN50 (2") to DN200 (8"), catering to different pipeline requirements within a vessel's freshwater distribution system.
- Marine-Grade Materials: The valve body is typically constructed from cast iron or ductile iron, offering excellent corrosion resistance against freshwater. The seat material, often rubber or EPDM, ensures a tight seal and long service life.
- Reliable Backflow Prevention: The integrated check mechanism automatically closes to prevent reverse flow, protecting pumps and other upstream equipment from damage caused by water hammer or system pressure changes.
- Easy Operation & Maintenance: Features a standard handwheel for manual operation. The design allows for relatively easy inspection and maintenance of internal components, which is crucial for minimizing vessel downtime.
Technical Specifications & Parameters:
| Parameter | Specification / Value |
| Product Standard | GB/T1855 |
| Valve Type | Stop Check Valve (Globe Pattern) |
| Nominal Diameter (DN) | 50, 65, 80, 100, 125, 150, 200 |
| Pressure Rating (PN) | 1.0 MPa |
| Suitable Medium | Fresh Water, Potable Water |
| Connection Standard | Flanged ends as per GB/T 17241 or other standards upon request |
| Operation Mode | Manual (Handwheel) |
| Flow Direction | Flow under the disc (Standard) |
Benefits for Your Marine Operations:
- Enhanced System Safety: Prevents contamination of freshwater tanks by blocking backflow, a critical requirement for vessel health and sanitation.
- Reduced Maintenance Costs: The durable design and reliable sealing minimize leaks and failures, leading to lower long-term operational expenses.
- Simplified System Design: Replaces the need for installing separate stop and check valves, optimizing space in crowded machinery spaces.
- Compliance with Marine Standards: Manufactured in accordance with GB/T1855, which aligns with common marine valve specifications, aiding in classification society approvals.
- Global Supply Chain Support: With shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we offer flexible and efficient logistics to get your valves where they need to be, on time.
Shanghai Zhibang's commitment to quality is backed by our ISO9001 certification, ensuring consistent manufacturing processes and product reliability. Our valves are trusted by clients across diverse global markets, from Eastern Europe to Oceania. When you choose our GB/T1855 Marine Stop Check Valve, you are not just purchasing a component; you are investing in the safety and efficiency of your vessel's most vital systems. We invite shipowners, shipyards, and marine equipment suppliers to contact us for detailed quotations, technical drawings, or to discuss custom requirements. Let our expertise in marine valve manufacturing contribute to the success of your next project.
Frequently Asked Questions (FAQ):
-
Q: What is the primary function of this stop check valve?
A: This valve serves two main functions: it allows an operator to manually stop the flow of freshwater (like a stop valve) and it automatically prevents reverse flow (like a check valve) when not manually closed, protecting the upstream system. -
Q: Can this valve be used with seawater or other corrosive fluids?
A: This specific model is designed and material-selected for freshwater systems. For seawater or other corrosive media, different material combinations (like bronze or stainless steel) would be required. Please inquire about alternative models. -
Q: What are the standard end connections?
A: The standard connection is flanged, manufactured according to GB/T 17241. However, connections can be customized to meet other international flange standards (e.g., ANSI, JIS, DIN) based on customer request and project specifications. -
Q: Is the valve suitable for vertical installation?
A: Yes, the valve can generally be installed in both horizontal and vertical pipelines, provided the flow direction is correct (typically indicated on the valve body). It's important to ensure the valve orientation supports the proper function of the check mechanism. -
Q: Do you provide documentation for classification society approval?
A: We can provide standard material certificates and test reports (e.g., pressure test reports) for our valves. Specific documentation required by different classification societies (like ABS, DNV, LR) can be discussed and arranged based on your project needs. -
Q: What is the typical lead time for an order?
A: Lead time depends on the order quantity, size, and specific requirements. For standard DN50-DN200 sizes, we often have stock or can produce within a competitive timeframe. Contact our sales team with your details for an accurate delivery schedule. -
Q: How does the manual operation work alongside the automatic check function?
A: The handwheel is connected to a stem that lowers a disc onto the seat to manually shut off flow. When the handwheel is opened, the disc can lift freely, and the check function takes over—the disc will close automatically if reverse flow pressure is detected. -
Q: What after-sales support do you offer?
A: We provide technical support for installation and operation. While valves are built for durability, we can supply spare parts like seal rings or gaskets upon request to facilitate maintenance.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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