The knowledge of check valve

Check valves are also known as reverse flow valves, reverse check valves, back pressure valves, one-way valves and disc valves.The term "reverse flow" is used to a certain extent to refer to a valve in the form of a swing disc;The term "check" refers primarily to a valve in the elevating disc type.The term "check valve" in current use includes swing and lift types.

The function of the check valve is to allow media to flow in only one direction and to prevent flow in the opposite direction.Normally,the valve works automatically.Under the action of fluid pressure flowing in one direction,the disc opens.In reserve flow,fluid pressure and disc weight cause the disc to act on the seat,cutting off flow.