Classification by function and use
(1) Truncation class: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Truncated valves, also known as closed-circuit valves, globe valves, the role is to connect or truncate the media in the pipeline.
(2) Check type: such as check valve, check valve also known as one-way valve or counter valves, check valves are an automatic valve, the role of the pipeline is to prevent the flow of media backflow, pump and drive motor reversal, and container media leakage. The bottom valve of water pump is also belonging to check valves.