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Help CenterGB/T1855 Stainless Steel Stop Check Valve, Flanged Connection, PN16 Pressure Rating
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As a professional manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance GB/T1855 Stainless Steel Stop Check Valve with Flanged Connection. Engineered for reliability in demanding industrial environments, this valve combines the superior corrosion resistance of stainless steel with a robust PN16 pressure rating, ensuring long-term service life and system integrity. Our commitment to quality, backed by years of experience since 2016 and a global export footprint, means you receive a product designed to meet stringent international standards and your specific operational needs.
This valve serves as a critical component in pipeline systems, functioning both as a reliable check valve to prevent backflow and as a stop valve to isolate sections of the line. Its design is focused on delivering safety, durability, and minimal maintenance.
Detailed Product Features & Technical Advantages:
- Superior Material Construction: Manufactured from high-grade stainless steel, the valve body and internals offer exceptional resistance to corrosion, erosion, and high temperatures, making it suitable for a wide range of media including water, steam, oil, and certain chemicals.
- Dual-Function Design: Integrates the functions of a stop valve and a check valve into a single unit, saving space, reducing installation points, and lowering overall system cost and complexity.
- Robust Flanged Connection: The flanged ends provide a secure, leak-proof connection to the pipeline, facilitating easy installation, maintenance, and a strong seal under high-pressure conditions.
- Reliable Sealing Mechanism: Features a metal-to-metal seat or optional soft-seated design (available upon request) for tight shut-off and effective prevention of reverse flow, even under fluctuating pressure conditions.
- Standard Compliance: Designed and manufactured in accordance with the Chinese national standard GB/T1855, ensuring dimensional interchangeability, performance reliability, and quality consistency.
- Versatile Operation: Primarily operated manually via a handwheel. Options for gear operation or pneumatic/electric actuators are available for remote or automated control applications.
- Wide Application Scope: Ideal for use in power generation plants, petroleum refineries, chemical processing, marine applications, water treatment facilities, HVAC systems, and general industrial piping.
Key Technical Specifications:
The table below outlines the primary specifications for the standard model. Customizations in size, pressure class, and end connections are available.
| Parameter | Specification |
|---|---|
| Design Standard | GB/T1855 |
| Body Material | Stainless Steel (Grade customizable) |
| Connection Type | Flanged (RF, FF, etc. available) |
| Pressure Rating | PN16 (Class 150) |
| Nominal Diameter (DN) | DN15 to DN600 (customizable) |
| Temperature Range | -29°C to 425°C (depending on seat material) |
| Seat Type | Standard Metal Seat / Optional Soft Seat |
| Operation Mode | Manual Handwheel (Gear/Actuator optional) |
Benefits for Your Operations:
- Enhanced System Safety: Effectively prevents potentially damaging backflow and allows for positive isolation, protecting expensive downstream equipment.
- Reduced Maintenance Costs: The durable stainless steel construction and reliable design minimize wear, leading to fewer replacements and lower lifetime costs.
- Operational Flexibility: The dual functionality provides control over flow direction and isolation without needing two separate valves, simplifying system design and operation.
- Global Compliance & Compatibility: Adherence to GB/T1855 standard ensures the valve can be integrated into systems requiring standardized components, and our experience supplying to markets worldwide confirms its broad applicability.
Shanghai Zhibang's expertise is validated by our ISO9001 certification, which governs our entire manufacturing process from material sourcing to final testing. With an annual export value ranging between US$1 Million and US$1.5 Million, our products have gained trust across diverse markets including North America, Europe, Southeast Asia, and Africa. We ship efficiently from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery. Choosing our Stainless Steel Stop Check Valve means partnering with a proven manufacturer dedicated to providing durable, high-performance flow control solutions that stand up to the test of time and pressure.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between a stop check valve and a regular check valve?
A: A regular check valve only allows flow in one direction and closes automatically to prevent backflow. A stop check valve incorporates this function but adds a manual or actuated mechanism (like a handwheel) that can forcibly hold the disc closed, acting as a positive isolation (stop) valve regardless of upstream pressure.
Q2: Can this valve be used with corrosive fluids?
A: Yes, the standard stainless steel construction offers good corrosion resistance. For highly aggressive media, we can discuss specific stainless steel grades (e.g., 316, 316L) or other alloy options to meet your chemical compatibility requirements.
Q3: What flange standards are available?
A: We typically supply flanges compliant with common standards like GB, ANSI, DIN, or JIS. The specific standard, facing type (RF, FF), and pressure class can be customized based on your piping specifications.
Q4: Is the PN16 rating suitable for high-pressure applications?
A: PN16 (approximately 16 bar at room temperature) is a common rating for many industrial applications. For higher pressure requirements, we offer valves with ratings such as PN25, PN40, or Class 300/600. Please inquire with your specific pressure needs.
Q5: Do you offer actuated versions of this valve?
A: Absolutely. While the standard version is manual, we can equip the valve with pneumatic actuators, electric actuators, or gearboxes to enable remote, automated, or easier manual operation for large sizes.
Q6: What is the lead time for a custom order?
A: Lead time depends on order quantity, customization complexity, and current production schedule. Standard sizes may have shorter lead times. We provide accurate delivery estimates upon receipt of your detailed specifications.
Q7: How do you ensure valve quality and performance?
A: Our ISO9001 certified quality management system covers every stage. Each valve undergoes rigorous testing, including shell tests, seat tests, and operational checks, to ensure it meets specified performance criteria before shipment.
Q8: What are your main export markets and shipping terms?
A: We export extensively worldwide, with strong presence in North America, Europe, Southeast Asia, Africa, and other regions. We ship from Shanghai, Guangzhou, Hong Kong, and Beijing under standard international trade terms like FOB, CIF, or CFR, tailored to customer needs.
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