There are many types of valves, the more common ones are: gate valves, globe valves, butterfly valves, ball valves, plug valves, check valves, pressure reducing valves, traps, etc.
The valve model is mainly composed of seven numbers or letters. The first letter indicates the valve type, the second number indicates the driving method, the third number indicates the connection method, and the fourth The number indicates the structural type, the fifth number indicates the nominal pressure, the sixth letter indicates the sealing surface material, and the seventh letter indicates the valve body material.
Valves refer to pipeline accessories used to open and close pipelines, control flow direction, adjust and control the parameters of the conveyed medium. The valve is a control component in the pipeline fluid transportation system. It is used to change the passage section and the flow direction of the medium. It has the functions of diversion, cut-off, throttling, check-back, diverting or overflow pressure relief.
Valve control can use a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic-hydraulic, spur gear, bevel gear drive wait.