Counterbalance valve are used in hydraulic systems to control the speed of hydraulic motors and cylinders independent of the load (prevents running away). In addition there is a isolater function for pipe burst safety. Counterbalance valve comprises basically of the housing, main poppet, pilot part, pilot spool, damping spool and pilot damping.
Pressure rating: 315 bar
Flow: up to 560 LPM
Pilot operated check valve, leak-free function
The counterbalance valve controls the returning flow q v2 in relation to the flow being directed into the other side of the actuator q v1. With cylinders the area ratio (q v2=q v1) has to be taken into account