Vickers PVE19 B2L STE1F41C21-12

19 GPM AT 1800 RPM PRESSURE COMPENSATED PISTON PUMP,SAE 2 BOLT FLANGE,SAE END PORTS,1 INCH STRAIGHT KEYED SHAFT, VITON SEALS. ADJ PRESSURE 300 TO 3000,LEFT HAND ROTATION.   A variable volume pump de-strokes itself once it reaches the pressure setting of pump compensator. If flow is shut off at its outlet it will not put any flow out but it will  maintain the pressure setting of the pump and provide any makeup flow needed in the system. When we give hydraulic classes, we cover this aspect of pump and relief valve adjustments. The miss-adjustment of these two components causes many pump failures.