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Home > Industrial Equipment & Components > Valve > Check Valve > GB/T1855 Stainless Steel Stop Check Valve in 304/316L Material, DN15-DN200 Size Range
GB/T1855 Stainless Steel Stop Check Valve in 304/316L Material, DN15-DN200 Size Range
Product Spotlights
Dual-function stainless steel stop check valve combining manual flow control with automatic backflow prevention. Manufactured to GB/T1855 standard in corrosion-resistant 304/316L material, available in DN15-DN200 sizes. Offers space-saving design, enhanced system protection, and reduced maintenance for critical applications in power, chemical, and water treatment industries.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, 304/316L Stainless Steel
Application:
Other, Petrochemical
Size Range:
DN15 to DN200
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, 304/316L Stainless Steel
Application
Other, Petrochemical
Size Range
DN15 to DN200
Design Standard
GB/T1855
Connection Type
Flanged, Threaded, or Wafer (Model Dependent)
Pressure Rating
PN16, PN25, PN40 (Customizable)
Temperature Range
-20°C to 200°C (Depending on Seal Material)
Seal Material
PTFE, NBR, EPDM (Optional)
Product Type
Stop Check Valve (Globe/Check Combination)
As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in delivering high-performance fluid control solutions. Our GB/T1855 Stainless Steel Stop Check Valve is engineered for critical applications where reliable flow control and backflow prevention are paramount. Combining the functions of a stop valve and a check valve, this product offers superior operational flexibility and safety, making it a trusted component in systems worldwide, from power plants to chemical processing facilities.
This valve is designed to provide precise flow regulation while automatically preventing reverse flow, protecting pumps and other equipment from potential damage. Crafted from premium 304 or 316L stainless steel, it offers excellent corrosion resistance, durability, and longevity even in demanding environments. Available in a comprehensive size range from DN15 to DN200, it caters to a wide spectrum of piping system requirements.
Key Features & Technical Advantages:
- Dual-Function Design: Acts as both an isolation (stop) valve and a non-return (check) valve, saving space and installation costs.
- Premium Material Construction: Manufactured from 304 or 316L stainless steel, ensuring high resistance to corrosion, erosion, and high temperatures.
- Reliable Sealing: Features precision-machined seats and optional seal materials (PTFE, NBR, EPDM) for bubble-tight shut-off and long service life.
- Versatile Operation: The handwheel allows manual flow control and positive closure. The check mechanism operates automatically based on differential pressure.
- Robust Construction: Designed and tested to meet GB/T1855 standards, ensuring structural integrity and performance reliability under rated conditions.
- Wide Application Suitability: Ideal for steam, water, oil, gas, and various chemical media in industries such as petrochemical, power generation, HVAC, and water treatment.
Detailed Technical Specifications:
| Parameter | Specification |
| Product Standard | GB/T1855 |
| Body Material | AISI 304 / 316L Stainless Steel |
| Size Range (Nominal Diameter) | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Pressure Rating (PN) | PN16, PN25, PN40 (Custom pressures available) |
| Connection Types | Flanged (RF/FF), Threaded (NPT/BSPT/BSPP), Wafer Style |
| Temperature Range | -20°C to 200°C (Standard); higher ranges with special seals |
| Seal Material Options | Standard: PTFE; Optional: NBR, EPDM, Viton |
| Flow Direction | Vertical installation recommended; horizontal possible with guide |
Benefits for Your Operations:
- Enhanced System Protection: Prevents water hammer and protects pumps, compressors, and other upstream equipment from reverse flow damage.
- Operational Efficiency: The combined stop/check function reduces the number of valves needed, simplifying piping layouts and lowering overall project costs.
- Reduced Maintenance: The robust stainless steel construction and quality sealing minimize wear, leakage, and the frequency of repairs or replacements.
- Compliance & Safety: Manufactured according to GB/T1855, providing assurance of quality and performance consistency for critical system safety.
- Flexibility: Available in a wide size range and connection types, allowing for seamless integration into new or existing systems.
Backed by our ISO9001-certified manufacturing processes and nearly a decade of industry experience since 2016, Shanghai Zhibang Valve guarantees product consistency and reliability. Our valves are trusted by clients across North America, Europe, Asia, and other global markets, supported by an annual export value demonstrating our international reach and customer confidence. We offer flexible shipping from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. Choose our GB/T1855 Stainless Steel Stop Check Valve for a robust, versatile, and dependable solution that safeguards your systems and optimizes your fluid control processes. Contact us today for a quotation or to discuss your specific application requirements.
Frequently Asked Questions (FAQ)
-
Q: What is the main difference between a standard check valve and this stop check valve?
A: A standard check valve only prevents backflow. Our stop check valve integrates an isolation function, allowing you to manually stop the flow entirely using the handwheel, providing both regulation and prevention in one unit. -
Q: How do I choose between 304 and 316L stainless steel material?
A: 304 stainless steel is suitable for most general applications with water, steam, and mild chemicals. 316L offers superior corrosion resistance, especially against chlorides and acids, making it the preferred choice for marine environments, chemical processing, or more aggressive media. -
Q: Can this valve be installed in any orientation?
A: For optimal performance of the check mechanism, vertical installation with flow upwards is recommended. Horizontal installation is possible but may require internal guidance; please consult our technical team for specific orientation requirements. -
Q: What pressure ratings are available?
A: Standard pressure ratings include PN16, PN25, and PN40. We can also provide valves rated for higher pressures based on your specific design requirements and system parameters. -
Q: Are custom sizes or end connections available outside the DN15-DN200 range?
A: Yes. As a manufacturer, we offer customization services. Sizes larger than DN200 or special end connections (like butt weld) can be developed upon request. Please provide your detailed specifications for a feasibility assessment. -
Q: What is the typical lead time for orders?
A: Lead time depends on order quantity, size, and material specifications. Standard configurations typically have shorter lead times. We provide accurate timelines upon order confirmation to ensure your project schedule is met. -
Q: Do you provide any testing or certification reports with the valves?
A: Yes. Our valves undergo rigorous factory testing, including shell tests and seat leakage tests. Relevant test reports and material certificates can be provided along with the shipment to ensure quality compliance. -
Q: What industries are these valves most commonly used in?
A: They are widely used in industries requiring reliable flow control and backflow prevention, such as thermal power plants, nuclear facilities, petrochemical plants, oil & gas pipelines, shipbuilding, HVAC systems, and water supply/distribution networks.
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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