Parker PVP33 - Variable Volume Piston Pumps

All control is achieved by the proper positioning of the swash plate. This is achieved by a servo piston acting on one end of the swash plate working against the combined effect of the off-setting forces of the pistons and centering spring on the other end. The control spool acts as a metering valve which varies the pressure behind the servo piston. The amount of flow produced by the Parker Piston Pump is dependent upon the length of stroke of the pumping pistons. This length of stroke, in turn, is determined by the position of the swash plate.

Maximum flow is achieved at an angle of 15-17 degrees. The rotating barrel, driven by the prime mover, moves the pistons in a circular path and the piston slippers are supported hydro statically against the face of the swash plate. When the swash plate is in a vertical position, perpendicular to the center line of the piston barrel, there is no piston stroke and consequently no fluid displacement. When the swash plate is positioned at an angle, the pistons are forced in and out of the barrel and fluid displacement takes place. The greater the angle of the swash plate, the greater the piston stroke.

Features

• High Strength Cast-Iron Housing for Reliability and Quiet Operation
• Optional Inlet/Outlet Locations for Ease of Installation
• Replaceable Bronze Port Plate
• Replaceable Piston Slipper Plate
• Thru-Shaft Capability SAE A Pilots Offered
• Low Noise Levels - Promote More Comfortable Operating Environment
• Fast Response Times
• Metric Pilot Shaft and Ports Available

Controls

• Pressure Compensation
• Remote Pressure Compensation
• Load Sensing
• Torque (Power) Limiting
• Adjustable Maximum Volume Stop
• Low Pressure Standby