Function and classification of valves

1. Classification by function and use

2. Cut-off valve: The cut-off valve is also called a closed-circuit valve, and its function is to connect or cut off the medium in the pipeline. Globe valves include gate valves, globe valves, plug valves, ball valves, butterfly valves and diaphragms.

3. Check valve: The check valve is also known as a one-way valve or a check valve, and its function is to prevent the backflow of the medium in the pipeline. The bottom valve of the water pump suction is also a stop...

4. Classification by nominal pressure

5. Vacuum valve: refers to the valve whose working pressure is lower than the standard atmospheric pressure.