活塞式流量控制閥通過曲柄連接桿將閥軸轉換為活塞的軸向移動。

在活塞來回移動過程中，通過改變活塞與閥座之間的流體面積來實現流量調節與壓力控制。

The piston flow regulating valve converts the rotation of the valve shaft into the axial movement of the piston
along the guide rail through the crank connecting rod mechanism.

In the process of the piston moving back and forth, the flow regulation and pressure con­trol are realized by

changing the flow area between the piston andthe valve seat.