Valve is a pipeline accessory, which is used to open and close the pipeline, control the flow direction, and adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into cut-off valve, check valve and regulating valve.
Valve is the control part in the fluid conveying system, which has the functions of cutting off, regulating, shunting, backflow prevention, pressure stabilization, shunting or overflow pressure relief.
The valves used in the fluid control system, from the simplest cut-off valve to various valves used in the extremely complicated automatic control system, have quite a variety of varieties and specifications.