Hydraulic Check valve

The check valve allows the oil flow to pass in one direction and prevents the oil from moving in the opposite direction. One-way check valves are used in oil lines where the return flow is problematic. In models with pilot operation, it is possible to return the flow or close the path with the help of an external source.

In the figure above, the cross-sectional view of the check valve is seen with the mechanism of the check valve and the check valve symbol. Due to the possibility of creating pores or circular heat in the ball and ball over time, it was gradually removed from the sealing mode, and now the use of poppy check valves has become more common.

The mechanism and symbol of the check valve with the pilot function can be seen in the image below