All check valves in front of the water pump in the water diversion project include hydraulic control valves, remote control float valves, pressure reducing valves and other water conservancy valves. Regulating valves and differential pressure control valves in heating and HVAC systems are also not allowed. There are also safety and explosion-proof valves such as safety valves and explosion-proof valves.
In fact, it is difficult to distinguish. Just remember that the four most common types of valves that can be used as cut-off and partition are the gate, cut-off, ball and butterfly valves.