Most of our current habits are distinguished by pressure and structural type.
Namely: according to nominal pressure: ≤1.6MPa for low pressure valve, pressure 2.5, 4.0, 6.4MPa for medium pressure valve, ≥10MPa for high pressure valve, and over 100MPa for ultra high pressure valve.
Mainly divided by structure types are:
Plug valve, gate valve, globe valve, ball valve-used to open or close the flow of medium in the pipeline.
Check valve (including bottom valve) —used to automatically prevent backflow of the medium in the pipeline.
Throttle valve-used to adjust the flow rate of the pipeline medium. Butterfly valve-used to open or close the medium in the pipeline. It can also be used for adjustment.
Safety valve-used in boilers, container equipment and pipelines, when the medium pressure exceeds the specified value, it can automatically eliminate the excess medium pressure to ensure the safety of production and operation.
Pressure reducing valve-used to automatically reduce the pressure of the medium in the pipeline and equipment. When the medium passes through the gap of the valve flap, the resistance will cause pressure loss and achieve the purpose of decompression.
Trap—Used to automatically remove condensate on steam pipes to prevent steam loss or leakage.
Since the valve is widely used, it plays a very important role. For example: in power plants, valves can control the operation of boilers and steam turbines; in petroleum and chemical production, valves also control the normal operation of all production equipment and technological processes. The same is true in other departments. Nevertheless, the valve is often overlooked when compared with other products. For example: when installing machinery and equipment, people often focus on the main machinery and equipment, such as: compressors, high-pressure containers, boilers, etc .; some are not properly selected ... These practices will reduce the overall production efficiency or stop production, or cause various other accidents. Therefore, the selection, installation, use, etc. of the valve must be conscientious and responsible. This is especially true for modern industrial production and construction.