Constant-displacement pump 1 delivers fluid to the head (work- ing) end of cylinder 2. Flow-control valve 3, serving to vary the speed of piston 5, is installed in the input line to the working end of the cylinder. Pump 1 operates at constant pressure, determined by the setting of relief valve 4, through which surplus fluid, delivered by the pump, drains back to the tank.
$4136$CHP,Dr$