(1) Cut off: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Truncated type valve, also known as closed valves, globe valves, and its role is to connect or disconnect the line of media. Check valve, check valve leakage, also known as one-way valve or check valve, the check valve is a kind of automatic valves, its role is to prevent the line of medium back, to prevent reverse pump and drive motor, and a container medium . Pump...

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