PSV-PSSF-20HRL-56

The PSV-PSSF-20HRL-56 pump belongs to the PSV Variable Vane Pumps series and is manufactured by Bosch Rexroth for hydraulic automation circuits that demand adjustable flow. It is a variable volume vane pump, so displacement shifts to match system requirements and reduce heat. A subplate mounted interface allows direct installation on a manifold block to keep plumbing compact. At 1800 rpm the pump delivers 15.2 gallons per minute, providing medium output for machine tools or assembly presses. System pressure is limited to 2000 PSI, preventing overload of downstream components. A standard pressure compensator trims the displacement as pressure rises, maintaining set pressure without external valves.

A two-stage compensator refines that control by introducing a secondary piston so pressure transitions stay stable under varying loads. The new Dash-56 port plate coating reduces internal wear and extends service life when oil cleanliness varies. Right-hand rotation matches conventional electric motor drives, simplifying alignment during commissioning. Sealing surfaces use Viton material, allowing the unit to work with petroleum-based fluids at elevated temperatures. A screw type volume control lets maintenance staff dial in the maximum displacement without removing the pump from the manifold.