STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CONTROL VALVE 2) Pressure compensation A pressure compensation valve is installed to the out- let port side of the control valve to balance the load. When two actuators are operated together, this valve acts to make pressure difference P between the upstream (inlet port) and downstream ( outlet port) of the spool of each valve the same regardless of the size of the load (pressure). In this way, the flow of oil from the pump is divided (compensated) in proportion to the area of opening S1 and S2 of each valve. 10-82 PC210/240-7K