Pump 1 delivers fluid from the tank to power cylinder 2 through coil 3, serving to compensate for the influence of the viscosity of the fluid, and through manual flow-control valve 4, serving to compensate for the variable working load of the machine tool. In case of a change in the pressure drop over coil 3, valve spool 5 is shifted to automatically change the hydraulic resistance in the delivery pipeline, compensating for the change in fluid viscosity and working load on table 6. Surplus fluid is discharged from the system back to the tank by relief valve 7.
$4151$CHP,Dr$