Variable displacement vane pumps

A fixed pump delivers the same flow all the time, and the excess goes back to tank through the relief valve as heat. A variable displacement vane pump adjusts its flow to what the circuit really needs, so the motor draws less power and the oil heats less. The result is lower energy cost and a quieter power unit.

The Hydraut VPV covers 5.3 to 22.2 cc/rev up to 70 bar, in single or double version, with direct coupling to a hollow-shaft electric motor. It fits small hydraulic power units on machine tools, presses and clamping circuits where space and noise matter.

For higher pressure or constant flow, compare the fixed displacement vane pumps (HS, HQ and VH).