RV1D - Variable displacement vane pumps with direct pressure adjuster

— The RV1D pumps are variable displacement vane pumps with mechanical pressure compensator.

— The pressure compensator keeps 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 instantaneously, adjusting the flow rate to the values required by the plant.
— Energy consumption is reduced and adequate in every phase of the cycle.
— The pump group has hydrostatic axial compensation distribution plates, that improve the volumetric efficiency and reduce wear of the components.
— In zero flow demand conditions, the pump delivers fluid only to compensate any possible leaks and pilot lines, keeping constant the circuit pressure.
— The compensator response times are very low such as to make unnecessary the pressure relief valve.