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Variable  Disp.Pump-PVD
P=100Bar, Displacement=6.3~100 cm3/rev


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— The PVD pumps are variable displacement vane pumps with a mechanical type
of pressure compensator.
— They allow instantaneous adjustment of the flow rate according to the circuit
requirements. The consequence is that energy consumption is reduced and
adequate in every phase of the cycle.
— The pump group is complete with hydrostatic axial compensation distribution
plates that improve the volumetric efficiency and reduce wear of the components.
— The pressure compensator operates with the principle of keeping the cam ring of
the pumping group in the eccentric position with use of an adjustable load spring.
When the delivery pressure equals the pressure corresponding to the spring setting,
the cam ring is moved toward the center, adjusting the flow rate to the values
required by the plant. In zero flow demand conditions, the pump delivers oil only to
compensate any possible bleedings and pilotings, keeping the circuit pressure
The compensator response times are very low such as to allow elimination of the
pressure relief valve.
— Also available is the version with maximum flow adjustment PVD***Q

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