ZHANFAN tell you what the valves are divided into according to the function

Valve according to function and use

(1) truncation class: such as gate valve, globe valve, plug valve, ball valve, butterfly valve, needle valve, diaphragm valve, etc.

Cut-off valve, also known as closed-circuit valve, cut-off valve, its role is to connect or cut off the medium in the pipeline. Check valve, check valve is also known as check valve or check valve, check valve is an automatic valve, its role is to prevent the media in the pipeline to prevent the reverse of the pump and drive motor, as well as the leakage of the container medium.

The bottom valve of the water pump suction close also belongs to the class of check valve. Explosion-proof valve, accident valve, etc., the role of safety valve is to prevent the medium pressure in the pipeline or device from exceeding the specified value, so as to achieve the purpose of protection. Regulating valve, throttle valve and pressure reducing valve, its role is to adjust the pressure of the medium, flow and other parameters.

(2) Vacuum class: such as vacuum ball valve, vacuum flapper valve, vacuum charging valve, pneumatic vacuum valve, etc. Its role is in the vacuum system, used to change the direction of the air flow, adjust the size of the gas flow, cut off or connect the pipeline of the vacuum system components called vacuum valves.

(3) Special purpose classes: such as pigging valves, blowdown valves, exhaust valves, filters, etc. The exhaust valve is an essential auxiliary component in the pipeline system, which is widely used in boilers, air conditioners, oil and gas, water supply and drainage pipelines. It is often installed at commanding heights or elbows to eliminate excess gas in the pipeline, improve the efficiency of pipeline road use and reduce energy consumption.