Products Details

The flange check valve is a valve used to prevent the backflow of the medium, which automatically opens or closes the disc by the force of the flow of the medium itself to ensure that the medium can only flow in one direction. This valve is widely used in industrial pipeline systems, such as oil, gas, chemical, food processing and building HVAC and urban water supply and drainage systems.

The working principle of the flange check valve is that when the medium flows in the specified direction, the valve disc is opened by the force of the medium; When the medium countercurrent, the valve disc due to the weight and the effect of the medium reverse force and the sealing surface of the valve seat close, to prevent the purpose of the medium countercurrent. Depending on the structure and installation method, flanged check valves can be divided into many types, such as vertical check valves, lift check valves, butterfly check valves, pipe check valves and pressure check valves.

When selecting a flanged check valve, it is necessary to consider factors such as its sealing performance, fluid resistance, installation space and media characteristics. For example, swing check valves are suitable for low flow rates and large diameter applications where the flow does not change often, while lift check valves have better sealing performance but greater fluid resistance. In addition, the design and manufacture of the flange check valve should meet the relevant national standards, such as GB/T12235, and various pipe flange standards and sealing types can be used to meet the needs of different projects.

In practical applications, flanged check valves can effectively prevent the pump and its drive motor from reversing, protect the piping system from water hammer damage, and ensure the unique flow of media. For example, in the food processing, beverage, brewing and other industries, the check valve can prevent the loss of liquid suction and pipeline liquid strike, to ensure the stability and safety of the production process.

In short, flanged check valves are an indispensable component in industrial and construction systems, and their proper selection and installation is critical to the safety and efficiency of the entire piping system.