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GB/T1855-1993 Suction Stop Check Valve, Flanged Connection, Pressure Test Report Provided
Product Spotlights
GB/T1855-1993 standard Suction Stop Check Valve with flanged connection. Features automatic backflow prevention for pump protection. Manufactured from durable materials like cast steel or stainless steel. Customizable in size and pressure rating. Includes a pressure test report for quality verification. Suitable for water, oil, gas, and corrosive media applications in global industrial projects.
Negotiable
MOQ: 10 Units (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
Other, Cast Steel / Stainless Steel / Duplex Steel
Application:
Other, Pump suction lines
Product Standard:
GB/T1855-1993
Payment & Shipping
Payment Methods:
Port of Shipment:
shanghai
Delivery Detail:
10 days
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Material
Other, Cast Steel / Stainless Steel / Duplex Steel
Application
Other, Pump suction lines
Product Standard
GB/T1855-1993
Connection Type
Flanged
Pressure Rating
Customizable according to project requirements
Size Range
DN50 to DN600 (or as per customer specification)
Sealing Type
Metal-to-metal or soft seal (optional)
Test Report
Pressure test report provided
Operation
Automatic closure upon flow reversal
As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd specializes in producing high-performance industrial valves for critical applications worldwide. Our GB/T1855-1993 Suction Stop Check Valve with Flanged Connection is engineered to provide reliable backflow prevention in pump suction lines and pipeline systems. This valve combines robust construction with automatic operation, ensuring system safety and efficiency. We support our products with comprehensive pressure test reports, offering tangible proof of quality and performance to our global clients across North America, Southeast Asia, Europe, and other key markets.
This Suction Stop Check Valve is designed to automatically close when flow reverses, protecting pumps and upstream equipment from damage caused by backflow. Its flanged connection ensures easy installation and secure integration into existing piping systems. The valve complies with the Chinese national standard GB/T1855-1993, which governs the design, manufacturing, and testing requirements for check valves, ensuring a standardized level of quality and reliability.
Core Features & Technical Advantages:
- Automatic, Fail-Safe Operation: The valve closes automatically by the force of the reversed flow, requiring no external power source or manual intervention. This fail-safe mechanism is crucial for preventing catastrophic system failures.
- Robust Flanged Design: The flanged ends provide a strong, leak-resistant connection that is compatible with standard piping flanges, simplifying installation, maintenance, and potential system modifications.
- Material Versatility: Manufactured from materials such as Cast Steel (WCB), Stainless Steel (304, 316), or Duplex Steel to suit different fluid properties (water, oil, corrosive media) and environmental conditions.
- Pressure Integrity: Each valve undergoes rigorous pressure testing (shell test, seat test) before shipment. A detailed pressure test report is provided, documenting the valve's performance under test conditions, which serves as a key quality assurance document for project acceptance.
- Customizable Configuration: Available in a range of sizes (typically from DN50 to DN600) and pressure classes. Sealing options (metal-to-metal for high temperatures, soft seal for tighter shut-off) can be specified based on application needs.
Key Specifications Overview:
| Parameter | Typical Specification / Option |
| Design Standard | GB/T1855-1993 |
| Connection | Flanged (RF, FF, RTJ types available) |
| Nominal Size | DN50 - DN600 (or custom) |
| Pressure Class | PN10, PN16, PN25, PN40, or ANSI Class 150, 300 |
| Main Body Material | Cast Steel, Stainless Steel, Duplex Steel |
| Sealing Material | Stellite, 13Cr, Rubber, PTFE (optional) |
| Operation Temperature | -20°C to +425°C (depending on material) |
| Applicable Fluid | Water, Oil, Gas, Steam, Corrosive Media |
| Testing | Pressure Test Report Provided |
Benefits for Your Project:
- System Protection: Prevents reverse flow, safeguarding pumps, compressors, and other sensitive equipment from damage, reducing downtime and maintenance costs.
- Verified Quality: The accompanying pressure test report provides documented validation of the valve's integrity, supporting quality control procedures and compliance requirements in industries like power generation, oil & gas, and chemical processing.
- Ease of Integration: Standard flanged connection design allows for straightforward installation into most industrial piping systems, reducing installation time and complexity.
- Long Service Life: Durable materials and precision manufacturing ensure reliable performance over extended periods, even in demanding service conditions.
- Global Supply Capability: With an annual export value ranging between US$1 Million to US$1.5 Million and major shipment ports like Shanghai, Guangzhou, Hongkong, and Beijing, we efficiently serve global markets including North America, South America, Europe, Asia, Africa, and Oceania.
Shanghai Zhibang Valve operates under an ISO9001 certified quality management system, which governs our entire manufacturing process from material sourcing to final testing. This systemic approach to quality, combined with our focus on export-oriented production, means we consistently deliver valves that meet international expectations for performance and reliability. Our Suction Stop Check Valve is not just a component; it is a critical safeguard for your fluid systems. We invite you to contact us with your specific size, pressure, and material requirements to receive a tailored solution and the corresponding quality documentation.
Frequently Asked Questions (FAQ):
-
Q: What is the main function of a Suction Stop Check Valve?
A: Its primary function is to automatically prevent backflow or reverse flow in a pipeline, typically installed on the suction side of a pump. It closes when flow direction reverses, protecting the pump and upstream system. -
Q: How does the "GB/T1855-1993" standard affect the valve quality?
A: GB/T1855-1993 is a Chinese national standard specifying technical requirements, materials, manufacturing, and testing methods for check valves. Compliance ensures the valve is produced according to defined quality and performance benchmarks. -
Q: Is the pressure test report included for every valve?
A: Yes, a pressure test report is provided for each valve or batch as standard practice. This report details the test pressures applied and the results, serving as a quality certificate. -
Q: Can this valve be customized for different pressure ratings?
A: Absolutely. We can manufacture the valve to meet various pressure classes such as PN10/16/25/40 or ANSI Class 150/300, based on your project specifications. -
Q: What are the available flange face types?
A> Common options include Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ). The specific type can be chosen to match your existing flange connections. -
Q: What materials are typically used for the valve body?
A> Standard body materials include Cast Steel (WCB) for general service, Stainless Steel (304/316) for corrosive environments, and Duplex Steel for high strength and corrosion resistance applications. -
Q: How does the automatic closure mechanism work?
A> The closure mechanism relies on the fluid dynamics. Under normal forward flow, the valve remains open. When flow stops or reverses, the pressure differential and/or the weight of the disc causes it to swing shut, sealing the pipeline. -
Q: What is your main shipping port and delivery time?
A> We primarily ship from Shanghai, Guangzhou, Hongkong, and Beijing ports. Delivery time depends on valve specification and quantity, typically ranging from 30 to 60 days for standard orders.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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