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GB/T1855 Marine Stop Check Valve For Freshwater, DN50 DN200 PN1.0MPa
Product Spotlights
GB/T1855 compliant marine stop check valve for freshwater systems. Combines shut-off and check valve functions in one unit for space and cost savings. Available in DN50 to DN200, PN1.0MPa, with material options for durability. Features reliable sealing and easy operation, enhancing safety and reducing maintenance in marine applications. ISO9001 certified manufacturer with global export experience.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Product Standard:
GB/T1855
Valve Type:
Stop Check Valve
Application Fluid:
Freshwater
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Product Standard
GB/T1855
Valve Type
Stop Check Valve
Application Fluid
Freshwater
Nominal Diameter (DN)
DN50 to DN200
Pressure Rating (PN)
1.0 MPa
Connection Type
Flanged (Standard), Threaded optional
Body Material
Cast Iron, Ductile Iron, Cast Steel
Disc Material
Bronze, Stainless Steel
Seat Material
Rubber, PTFE
Operation Mode
Manual, optional pneumatic/hydraulic actuator
As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-quality fluid control solutions for the global marine industry. Our GB/T1855 Marine Stop Check Valve for Freshwater is engineered to deliver reliable, maintenance-free performance in demanding shipboard freshwater systems. Designed to meet stringent marine standards, this valve combines the functions of a stop valve and a check valve, ensuring unidirectional flow control and positive shut-off, which is critical for the safety and efficiency of your vessel's operations.
This valve is a cornerstone for any marine freshwater system, offering robust construction and versatile application. Here are its key features and benefits:
- Dual-Function Design: Integrates a globe valve's shut-off capability with a check valve's backflow prevention, simplifying piping layouts and reducing installation points.
- Robust Construction: Manufactured from high-grade materials like cast iron, ductile iron, or cast steel body with bronze or stainless steel trim to withstand corrosive marine environments.
- Reliable Sealing: Utilizes resilient rubber or PTFE seats to ensure bubble-tight shut-off and prevent leakage, even after prolonged use.
- Easy Operation & Maintenance: Features a standard handwheel for manual operation. The streamlined internal design minimizes turbulence and pressure drop, while the accessible construction allows for easy inspection and maintenance.
- Broad Compatibility: Suitable for a wide range of freshwater applications onboard, including cooling water systems, ballast water treatment lines, firefighting mains, potable water distribution, and general service lines.
Technical Specifications & Configurations
The following table outlines the standard specifications for our GB/T1855 Marine Stop Check Valve. Custom configurations are available upon request to meet specific project requirements.
| Parameter | Specification / Options |
|---|---|
| Product Standard | GB/T1855 (Chinese National Standard for Marine Valves) |
| Valve Type | Stop Check Valve (Globe-style check valve) |
| Nominal Diameter (DN) | DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating (PN) | PN1.0 MPa (10 bar) |
| Connection Type | Flanged (Standard as per GB/T), Threaded ends optional |
| Body Material | Cast Iron (HT200/250), Ductile Iron (QT450-10), Cast Steel (WCB) |
| Disc & Stem Material | Bronze, Stainless Steel (304/316) |
| Seat Material | Nitrile Rubber (NBR), EPDM, PTFE |
| Operation | Manual Handwheel (Standard), Gear Operator or Pneumatic/Hydraulic Actuator optional |
| Applicable Fluid | Freshwater, Seawater (with compatible material selection) |
| Temperature Range | -20°C to 120°C (depends on seat material) |
Advantages for Your Marine Projects
- Enhanced System Safety: Prevents dangerous backflow in freshwater lines, protecting pumps and other upstream equipment from damage.
- Space and Cost Savings: Replaces the need for separate shut-off and check valves, saving valuable space in tight engine rooms and reducing overall piping component costs.
- Reduced Maintenance Downtime: The durable materials and reliable design lead to a longer service life and fewer unscheduled repairs, maximizing vessel uptime.
- Global Compliance: Manufactured in accordance with GB/T1855, a standard recognized and accepted in many international marine projects, ensuring easier approval and integration.
- Flexible Sourcing: Available in a complete size range from DN50 to DN200, allowing for consistent sourcing for your entire freshwater system.
Backed by our ISO9001-certified quality management system and an annual export value exceeding US$1 million, Shanghai Zhibang Valve stands as a trusted partner for shipbuilders, shipyards, and marine equipment suppliers worldwide. Our valves are shipped from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery to key markets across North America, Europe, Asia, Africa, and Oceania. Choosing our GB/T1855 Marine Stop Check Valve means investing in a component built for reliability, backed by professional manufacturing expertise, and supported by a global logistics network. Contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ)
-
Q: What is the main difference between a stop check valve and a regular check valve?
A: A regular check valve only prevents backflow automatically. A stop check valve adds a manual or actuated override—like a globe valve—allowing you to positively shut off the flow regardless of pressure direction, offering greater control. -
Q: Can this valve be used for seawater applications?
A> While designed for freshwater, it can be configured for seawater service by selecting appropriate corrosion-resistant materials such as cast steel (WCB) body with stainless steel (316) trim and suitable seat materials like EPDM or PTFE. Please specify your fluid medium when inquiring. -
Q: Are the flanges compatible with international standards like ANSI or JIS?
A: The standard valve is produced with flanges per GB/T standards, which are often compatible or adaptable. We can supply valves with ANSI, JIS, or DIN standard flanges upon request to match your existing piping. -
Q: Is the valve suitable for vertical installation?
A: Yes, this stop check valve is designed for installation in both horizontal and vertical pipelines with upward flow. For vertical installation, ensure the flow direction is correctly oriented. -
Q: What is the lead time for an order of DN100 valves?
A> Lead times vary based on order quantity and material selection. For standard configurations in cast iron or ductile iron, we typically maintain stock for popular sizes. Please contact our sales team for the most accurate delivery schedule. -
Q: Do you provide actuated versions for remote operation?
A: Yes. We offer optional pneumatic (air) or hydraulic actuators that can be fitted to the valve for automated or remote control, which is ideal for centralized control rooms. -
Q: What warranty or after-sales support do you offer?
A: We provide a standard warranty against manufacturing defects. Our technical support team is available to assist with installation guidance, troubleshooting, and spare parts inquiries. -
Q: Can I get a sample before placing a bulk order?
A: Sample valves are available for qualified buyers. Please reach out to discuss sample terms, including costs and lead times.
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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