National Standard Flange Shut-Off Valve

The National Standard Flange Shut-Off Valve is a key flow control component designed for on-off control of fluid media in industrial pipelines. It adopts a flange connection method, which is easy to install, disassemble and maintain, and is widely used in pipelines transporting water, steam, oil, gas, and other common media. This valve fully complies with GB/T 12224 (Steel Valves - Dimensions, Faces and Ends), GB/T 12229 (Cast Steel Valves for General Purpose), and GB/T 12234 (Steel Valves - Flanged and Butt Welding Ends), ensuring consistent quality, interchangeability and compatibility with GB-standard pipelines worldwide.

Different from ordinary shut-off valves, our national standard flange shut-off valve adopts an optimized valve core and seat structure, which not only ensures reliable shut-off performance to prevent fluid leakage, but also has good throttling performance, making it suitable for both on-off control and simple flow regulation scenarios.

1.Strictly GB-Compliant : Fully meets Chinese National Standards (GB/T 12224, GB/T 12229, GB/T 12234), with precise dimensions, standardized flange connections and consistent performance. It can be perfectly matched with GB-standard pipelines and equipment, avoiding compatibility problems in installation and replacement.

2.Secure Flange Connection : Adopts standard flange connection (GB/T 9112-9124), with strong connection stability, good sealing performance and easy disassembly. It is suitable for large-diameter, high-pressure pipeline systems, and can be quickly maintained without removing the entire pipeline, reducing downtime.

3.Reliable Shut-Off Performance : The valve core and seat adopt a precision grinding process, with tight fit and excellent sealing performance. The metal-to-metal or soft-seal structure (PTFE, rubber) can effectively prevent fluid leakage, ensuring zero leakage under rated pressure and temperature, and improving the safety of the pipeline system.

4.Durable Material Selection : The valve body is made of high-quality cast steel (WCB, WC6, WC9), stainless steel (CF8, CF8M) and other materials, which have excellent corrosion resistance, high temperature resistance and pressure resistance, adapting to various harsh working environments and extending the service life of the valve.

5.Easy Operation : Equipped with a high-strength cast iron or stainless steel handwheel, the operation is light and labor-saving. The valve stem adopts a smooth lifting structure, with small opening and closing stroke, quick response, and clear on-off indication, which is convenient for on-site operation and management.

6.Wide Application Range : Suitable for a variety of media such as water, steam, oil, gas, chemical reagents, and urban water supply and drainage. It is widely used in industrial and civil fields, with strong adaptability to different working conditions.

7.Cost-Effective : As a direct factory, we adopt batch production and optimized production processes to reduce production costs. While ensuring GB compliance and product quality, we provide competitive prices, helping customers reduce procurement costs.

- Water Supply & Drainage Industry : Urban water supply pipelines, sewage treatment plants, water conservancy projects, and building water supply and drainage systems, used for on-off control of water flow.

- Thermal Power & Heating Industry : Thermal power plants, central heating systems, and boiler pipelines, used for controlling the flow of steam and hot water, with high temperature and pressure resistance.

- Petrochemical & Oil Industry : Oil refineries, oil storage tanks, and oil transmission pipelines, used for on-off control of crude oil, diesel, and other oil products.

- Chemical Industry : Chemical processing plants, pharmaceutical factories, and chemical reagent pipelines, suitable for controlling corrosive media (optional stainless steel material).

- Civil & Commercial Buildings : Hotels, hospitals, shopping malls, and residential buildings, used for water supply, heating, and air conditioning pipeline systems, with easy installation and maintenance.

- Other Fields : Food and beverage industry, metallurgical industry, and environmental protection projects, adapting to different medium and working condition requirements.

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