Bosch Rexroth | PSV-PSSF-15ERM-56
PSV-PSSF-15ERM-56
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The PSV-PSSF-15ERM-56 variable vane pump belongs to the PSV Variable Vane Pumps series from Bosch Rexroth and supplies adjustable hydraulic flow for automation systems. It operates on a pilot-operated principle so a small control piston balances pressure across the ring to vary vane eccentricity. A standard pressure compensator functions as the primary control type, limiting outlet pressure when demand falls. The unit has a displacement of 25 cm³ per revolution and, at its maximum drive speed of 1800 rpm with a 100 psi load, produces 43.5 L/min of oil. Right-hand rotation aligns with clockwise electric motors, and the housing fits on a subplate in any mount position to ease manifold design. Viton seals provide fluid compatibility and temperature resistance, while a total mass of 21 kg keeps handling straightforward.
For reliable service, the pump can start as low as 750 rpm without losing lubrication, and the system may be pressurized up to 69 bar during full load cycles. Inlet conditions must be maintained between 0.8 and 1.7 bar absolute to avoid cavitation and sustain volumetric efficiency. Output volume is trimmed with a screw adjustment that shifts the compensator spring preload, enabling quick field tuning rather than component replacement. These parameters let designers match flow and pressure to cylinders and motors while protecting the pump from overspeed or starvation in varied operating environments.
Technical Specifications
Control Principle
Pilot-Operated
Control Type
Pressure Compensator (Std)
Displacement
25 cm3/rev (1.5 in3/rev)
Flow @ 1800 Rpm (100 Psi)
43.5 L/min (11.5 gpm)
Max Drive Speed
1800 rpm
Max Inlet Pressure
1.7 bar abs (24.5 psia)
Max System Pressure
69 bar (1000 psi)
Min Drive Speed
750 rpm
Min Inlet Pressure
0.8 bar abs (11.6 psia)
Mount Position
Any
Mounting
Subplate Mounted
Rotation
Right-Hand (Clockwise)
Seal Material
Viton (FKM)
Volume Control
Screw Adjustment
Weight
21 kg (46 lb)
1620 Old Apex Road
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