One-way valves can also be used to supply piping to auxiliary systems where pressure may rise above system pressure. One-way valve can be mainly divided into swing type one-way valve (according to the center of gravity rotation) and lift type one-way valve (along the axis of movement). The function of the one-way valve is to allow the medium to flow in only one direction and to prevent the flow in the opposite direction. Normally the valve operates automatically and the disc opens under the pressure of the fluid flowing in one direction; When the fluid flows in the opposite direction, the pressure of the fluid and the disc self-coincidence disc act on the seat to cut off the flow.

:

:

:

:

:

Annex：