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GB/T1855 Standard Marine Stop Check Valve for Engine Cooling Water Lines
Product Spotlights
Dual-function GB/T1855 marine valve combining manual stop and automatic check features for engine cooling lines. Offers robust construction in bronze, cast iron, or stainless steel, ensuring corrosion resistance and reliable backflow prevention. Compliant with standards, available in DN15-DN300 and PN10-PN25, suitable for global marine applications. ISO9001-certified manufacturing guarantees quality and durability.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Standard:
Other, GB/T1855
Material:
Other, Bronze, Cast Iron, Stainless Steel (customizable)
Application:
Other, Marine Engine Cooling Water Lines
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
Other, GB/T1855
Material
Other, Bronze, Cast Iron, Stainless Steel (customizable)
Application
Other, Marine Engine Cooling Water Lines
Function
Other, Stop Flow
Connection Type
Flanged, Threaded
Nominal Pressure
PN10, PN16, PN25
Nominal Diameter
DN15 to DN300
Operation
Automatic, Manual Reset Available
Temperature Range
-20°C to 120°C
Seal Material
NBR, EPDM, Viton (optional)
As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing reliable and durable fluid control solutions for the global marine industry. Our GB/T1855 Standard Marine Stop Check Valve is engineered to deliver exceptional performance and safety in critical engine cooling water systems. We understand the demanding conditions at sea, and this valve is built to meet those challenges, offering a combination of precise flow control and reliable backflow prevention that ship operators and marine engineers can depend on.
This valve serves a dual purpose: it acts as a shut-off valve to isolate sections of the cooling system for maintenance and as a check valve to automatically prevent the reverse flow of water, which could lead to engine damage or system inefficiency. Its robust construction ensures long service life even with exposure to seawater, temperature fluctuations, and vibration.
Key Features and Technical Advantages:
- Dual-Function Design: Integrates stop and check valve functions into a single, compact unit, saving space and simplifying piping layouts.
- Robust Construction: Available in materials like bronze for corrosion resistance and cast iron for high-strength applications. Stainless steel options are available for highly corrosive environments.
- Reliable Sealing: Features a tight-sealing disc and seat arrangement. Various seal materials like NBR, EPDM, or Viton can be selected based on the specific fluid temperature and chemical compatibility requirements.
- Easy Operation and Maintenance: Designed for easy manual operation. The internal mechanism is accessible for inspection and maintenance, minimizing downtime.
- Compliance with Standards: Manufactured in strict accordance with the Chinese national standard GB/T1855, ensuring dimensional interchangeability and performance reliability.
Technical Specifications Table:
| Parameter | Specification |
|---|---|
| Design Standard | GB/T1855 |
| Nominal Diameter (DN) | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300 |
| Nominal Pressure (PN) | PN10, PN16, PN25 |
| Body Material | Bronze, Cast Iron, Ductile Iron, Stainless Steel (CF8/CF8M) |
| Disc/Seat Material | Bronze, Stainless Steel with Resilient Seal (NBR/EPDM/Viton) |
| Connection Type | Flanged (GB/T9113), Threaded (G, NPT) |
| Applicable Medium | Fresh Water, Sea Water, Engine Cooling Water, Non-aggressive Liquids |
| Operating Temperature | -20°C to 120°C (Standard Seal) |
| Flow Direction | Horizontal or Vertical (Upward Flow Recommended) |
Benefits for Your Operations:
- Enhanced System Safety: Prevents dangerous backflow that can cause water hammer, pump damage, or engine overheating.
- Reduced Maintenance Costs: The durable design and quality materials reduce the frequency of repairs and replacements.
- Operational Efficiency: Allows for safe isolation of system sections without requiring a separate check valve, streamlining maintenance procedures.
- Global Supply Capability: With annual export experience to markets across North America, Europe, Asia, and more, we understand international requirements and ensure timely delivery from major ports like Shanghai, Guangzhou, and Hong Kong.
Since our establishment in 2016, Shanghai Zhibang Valve has built a reputation for quality and reliability, exporting over US$1 million worth of valves annually to a diverse global clientele. Our ISO9001-certified manufacturing processes guarantee consistent quality in every GB/T1855 Marine Stop Check Valve we produce. Partner with us for a valve solution that combines technical precision with rugged durability, designed to protect your vessel's most critical systems. Contact us today to discuss your specifications or request a quotation for your project.
Frequently Asked Questions (FAQ):
-
Q: What is the primary function of this stop check valve?
A: It serves two main functions: to manually stop the flow of cooling water (like a gate valve) and to automatically prevent reverse flow (like a check valve) when in the open position, protecting pumps and engines. -
Q: Is this valve suitable for use with seawater?
A: Yes, when ordered with appropriate materials such as bronze or stainless steel body and compatible seal materials like EPDM or Viton, it is designed to handle seawater in cooling systems. -
Q: Can the valve be installed in any orientation?
A: For optimal check valve function, installation in a horizontal pipeline or in a vertical line with upward flow is recommended. Specific orientation requirements can be confirmed based on your application. -
Q: What is the lead time for an order?
A: Lead times vary based on order quantity and material specifications. Standard configurations typically have shorter lead times. Please inquire for a specific schedule. -
Q: Do you offer customization for different pressure ratings or connections?
A: Yes. While standard valves comply with GB/T1855 and common PN ratings, we can discuss customizations for special pressure requirements or alternative flange/thread standards upon request. -
Q: How does the manual stop function work?
A: The valve is equipped with an external handwheel or lever. Turning it clockwise closes the disc against the seat, positively stopping all flow through the line for isolation purposes. -
Q: What maintenance does this valve require?
A: It is designed for low maintenance. Periodic inspection of external components and, if necessary, internal seal replacement after extended service is recommended. The design allows for relatively easy maintenance. -
Q: What certifications does your company hold for quality assurance?
A: Our manufacturing facility is ISO9001 certified, which governs our quality management system for design, production, and testing to ensure product consistency and reliability.
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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