STRUCTURE AND FUNCTION CLSS CLSS 1. OUTLINE Features CLSS stands for Closed center Load Sensing System, and has the followings characteristics. 1 - Controlability, not influenced by load. 2 - Controllable digging force at fine control range. 3 - Easy simultaneous operation by spool opening proportional flow dividing function. 2. PRESSURE COMPENSATION CONTROL A valve (pressure compensation valve) is installed to the inlet port side of the control valve to balance the load. When there is compound operation of the actuators, this valve acts to make pressure difference P constant for the up- stream flow (inlet port) and downstream flow (outlet port) of the notch of each spool.
In this way, the flow of oil from the pump is divided in proportion to area of opening S1 and S2 of each valve. Load Load W W Actuator Actuator P P S1 S1 Pressure compensation valve Pressure compensation valve Pump RKS00691 10-39 SK818-5 SK820-5 turbo