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Home > Industrial Equipment & Components > Valve > Check Valve > GB/T1855 Marine Stop Check Valve for Bilge and Ballast Systems
GB/T1855 Marine Stop Check Valve for Bilge and Ballast Systems
Product Spotlights
GB/T1855 compliant marine stop check valve designed for bilge & ballast systems. Combines non-slam check valve and positive shut-off stop valve in one unit for space savings and enhanced safety. Constructed from corrosion-resistant materials like cast steel & stainless steel trim for seawater durability. Available in sizes DN50-DN500 with flanged connections. ISO9001 certified manufacturing ensures reliable performance for global maritime applications.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Application:
Other, Marine bilge and ballast systems
Product Standard:
GB/T1855
Valve Type:
Stop Check Valve
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Application
Other, Marine bilge and ballast systems
Product Standard
GB/T1855
Valve Type
Stop Check Valve
Connection Type
Flanged (common), Threaded optional
Body Material
Cast Iron, Ductile Iron, Cast Steel
Seat Material
Bronze, Stainless Steel
Pressure Rating
PN10, PN16, Class 150
Size Range
DN50 to DN500 (2“ to 20“)
Operation
Manual handwheel
Design Feature
Non-slam check function, stop isolation
As a specialized manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve is dedicated to providing reliable and compliant fluid control solutions for the global maritime industry. Our GB/T1855 Marine Stop Check Valve is engineered specifically for the demanding environments of shipboard bilge and ballast systems, offering a critical combination of check valve functionality and positive shut-off capability. This dual-purpose design not only prevents backflow to protect pumps and systems but also allows for complete isolation when required, enhancing operational safety and system integrity. Trusted by clients across continents from North America to Southeast Asia, we understand the need for valves that perform consistently under pressure, resist corrosion, and meet stringent marine standards.
The core value of this valve lies in its robust construction and intelligent design. It serves as a guardian for your pumping systems, ensuring one-way flow while providing the option for a secure seal. Let's delve into the specific features, technical specifications, and advantages that make this valve a prudent choice for shipbuilders, shipyards, and vessel operators.
Key Features & Technical Advantages:
- Dual-Function Design: Integrates a check valve and a stop valve into a single unit, saving space, reducing piping complexity, and lowering installation costs.
- Non-Slam Check Mechanism: The internal swing check disc is designed to close smoothly before reverse flow reaches significant velocity, minimizing water hammer and protecting system components from shock damage.
- Positive Shut-Off: The manual handwheel operates a stem that mechanically forces the check disc onto its seat, creating a bubble-tight seal for complete isolation during maintenance or system segmentation.
- Marine-Grade Materials: Available in various body materials like cast iron and cast steel, with trim options including bronze and stainless steel, to withstand seawater corrosion, erosion, and the marine atmosphere.
- Compliance with GB/T1855: Manufactured in accordance with this Chinese national standard for marine valves, ensuring dimensional interchangeability, pressure ratings, and performance criteria suitable for marine applications.
- Robust Construction: Features a sturdy body, reinforced hinge pins, and durable seat surfaces to ensure long service life even with frequent cycling and abrasive media.
- Easy Maintenance: Design often allows for in-line maintenance of internal parts without removing the entire valve body from the pipeline, reducing downtime.
Technical Specifications Overview:
| Parameter | Details |
|---|---|
| Design Standard | GB/T1855 |
| Nominal Pressure (PN) | PN10, PN16, Class 150 (Customizable) |
| Size Range (DN) | DN50, DN65, DN80, DN100, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500 |
| Size Range (NPS) | 2", 2.5", 3", 4", 6", 8", 10", 12", 14", 16", 18", 20" |
| Connection Ends | Flanged as per GB/T, JIS, ANSI standards; Threaded ends optional |
| Body Material Options | Cast Iron (GG25), Ductile Iron (GGG40), Cast Steel (WCB) |
| Trim Material (Seat/Disc) | Bronze, Stainless Steel (CF8M/316), other alloys available upon request |
| Operation | Manual Handwheel (Standard), Gear Operator optional for larger sizes |
| Temperature Range | -20°C to +120°C (depending on seat material) |
| Suitable Media | Sea Water, Bilge Water, Ballast Water, Oily Water Mixtures |
Benefits for Your Marine Operations:
- Enhanced System Safety: Prevents accidental backflow which could flood compartments or damage pumps. The stop feature allows safe isolation for repairs.
- Reduced Maintenance Costs: Durable materials and non-slam action extend the service life of the valve and connected equipment, lowering total cost of ownership.
- Operational Flexibility: The ability to stop flow provides control over ballast transfer and bilge pumping sequences, improving operational efficiency.
- Space and Weight Optimization: Combining two valve functions into one compact unit saves valuable space and reduces weight compared to installing separate valves.
- Global Supply Compatibility: With shipments coordinated from major ports like Shanghai, Guangzhou, and Hong Kong, we ensure timely delivery to your project sites worldwide.
Choosing Shanghai Zhibang Valve means partnering with an experienced manufacturer whose products are proven across diverse maritime markets. Our annual export volume reflects the consistent trust placed in us by clients from North America to Oceania. Backed by our ISO9001 certification, every GB/T1855 Marine Stop Check Valve undergoes rigorous quality checks to ensure it meets the specified performance standards. We are committed to providing not just a product, but a reliable solution that contributes to the safety and efficiency of your vessel's critical systems. Contact us today to discuss your specific requirements, request a detailed quotation, or learn more about our full range of marine valves tailored for bilge, ballast, and other shipboard services.
Frequently Asked Questions (FAQ):
-
Q: What is the primary difference between a standard check valve and this stop check valve?
A: A standard check valve only prevents reverse flow automatically. A stop check valve adds a manual override—via a handwheel and stem—that can force the disc closed to provide positive isolation, functioning as both a check valve and a stop valve. -
Q: Is this valve suitable for use with oily bilge water?
A: Yes, it is designed for bilge systems which often contain oil-water mixtures. Material selections like cast steel with stainless steel trim offer good resistance. For specific fluid compositions, consulting with our engineers is recommended. -
Q: Can you provide valves with flanges matching ANSI or JIS standards instead of GB?
A: Absolutely. While the valve is manufactured to GB/T1855 for its core design, we can often supply it with flanges drilled and faced according to ANSI, JIS, DIN, or other international standards to suit your piping specifications. -
Q: What is the typical delivery lead time for an order?
A: Lead times vary based on size, material, and order quantity. Standard configurations may have shorter lead times. We provide estimated schedules upon receipt of your inquiry and work efficiently from our Shanghai base to meet project deadlines. -
Q: Does the valve require regular maintenance?
A: Like all mechanical equipment, periodic inspection is advised. However, its robust design minimizes maintenance needs. Checking for smooth operation of the handwheel and hinge mechanism during routine surveys is typically sufficient. -
Q: Are spare parts like seals or discs available for purchase?
A: Yes, we supply genuine spare parts kits to ensure long-term operability. Providing the valve model/size and serial number helps us identify the correct components. -
Q: Can this valve be installed in any orientation?
A: For optimal performance of the swing check mechanism, installation in horizontal lines with the hinge pin horizontal is generally recommended. Vertical installation may be possible depending on flow conditions; please consult our technical data. -
Q: Do you offer any warranty on your marine valves?
A: We stand behind the quality of our products. A standard warranty period applies, covering defects in materials and workmanship under normal use. Specific warranty terms are provided with our commercial proposals.
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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