Three, a check VALVE disc : disc around the valve seat within the pin shaft rotary check valve. Disc check valve has the advantages of simple structure, can only be installed in horizontal pipelines, poor sealing.

Four, pipeline valve: the valve along the centre line of the valve body sliding valve. Pipe type check valve is a new valve,knife gate valve, it has the advantages of small volume, light weight, good processing, is one of valve development. But the fluid drag coefficient than the swing check valve slightly big.

Five, pressing type check valve: This valve is used as boiler feed water and steam cut-off valve, it has the lift check valve and stop valve or valve integrated function.

In addition, there are some does not apply to the pump outlet installed check valve, such as valve, spring type, Y type CHECK VALVES.