PSV40/SV25 6974047 62

The PSV40/SV25 6974047 62 variable vane pump is manufactured by Bosch Rexroth as part of the PSV Variable Vane Pumps series. It supplies adjustable hydraulic flow for machine tools and factory automation circuits. A displacement of 65 cc per revolution determines the volume delivered during each shaft turn, giving predictable output across the operating range. At 1800 rpm and 100 psi it produces 117.3 L/min, a rate suitable for medium-duty actuator groups. The pump can run as slowly as 750 rpm, permitting energy-saving low-speed cycles, and up to 1800 rpm for peak demand periods. Right-hand rotation when viewed from the shaft end aligns with common electric motor drives. Installation is simple because the unit can be mounted in any position without affecting internal lubrication.

The hydraulic envelope is rated for a maximum system pressure of 138 bar, so the pump can power clamping circuits and servo valves without overstressing its case. An allowable inlet pressure up to 1.7 bar absolute supports flooded suction arrangements, while the minimum inlet pressure of 0.8 bar absolute protects against cavitation when the supply tank is below the pump. Compatibility with the ISO 3019/1 mounting pattern lets the housing bolt directly to standardized motor flanges and bracketry. These limits, combined with the variable vane geometry, give designers a compact source of stable flow and pressure control in industrial hydraulic systems.