Vane pumps

Vane pumps

 

DFP - Fixed displacement vane pumps

The DFP pumps are fixed displacement vane pumps made in four different sizes, each size having five different nominal displacement. They are available with one pumping element (single pump) or with double pumping element (double pump).

  • The pumping group is composed of a cartridge type compact element that contains the rotor, the vanes, the cam ring and the head disks. The cartridge is easily removable without the need to disconnect the pump from the hydraulic circuit, thus simplifying the maintenance operations.
  • The special elliptical profile of the cam ring, with double suction and delivery chambers one against the other, eliminates the radial thrusts on the rotor, decisively reducing wear of the pump. In addition, the use of a 12-vane rotor reduces the delivery pressure pulsations, suppressing the vibrations and noise level of the pump.
 
13100 | | | 3D
 

PVD - Variable displacement vane pumps with direct adjuster

NOTE: pumps PVD 9, 13, 17 and 22, series 30, are no more available. 
For small sizes only the pump PVD 25 series 31 is available.
Other sizes from 28 to 145 remain in series 30.

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 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, 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 constant.
  • The compensator response times are very low such as to allow elimination of the pressure relief valve.
 
14100 | | | 3D
 

PVE - Variable displacement vane pumps with direct pressure regulator

New vane pumps PVE series 30. They are variable displacement vane pumps with direct pressure regulator.

Available in four dimensions with maximum displacement from 6,6 to 22,2 cm3/rev and with pressure regulator max setting values up to 35 bar and 70 bar (standard).

 

The PVE pumps are variable displacement vane pumps with direct pressure regulator.

  • The pump group is complete with hydrostatic axial compensation distribution plates that improve the volumetric efficiency and reduce wear of the components.
  • The pressure regulator adjustable load spring keeps the pump group cam ring in eccentric position. When the delivery pressure equals the pressure corresponding to the spring setting, the cam ring is moved so to reduce the displacement, 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, keeping the circuit pressure constant.
  • The PVE pumps are available in four dimensions with maximum displacement from 6,6 to 22,2 cm3/rev and with pressure regulator max setting values up to 35 bar and 70 bar (standard).

 

 
14110 | | | 3D
 

PVA - Variable displacement vane pumps with pilot adjuster

The PVA pumps are variable displacement vane pumps with piloted type hydraulic pressure compensator.

  • They permit instantaneous adjustment of the flow rate according to the circuit requirements.The consequence is that energy consumption is reduced and adequate in every cycle phase.
  • The pumping 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 a piston controlled hydraulically by a pressure pilot stage.
  • When the delivery pressure equals the pressure corresponding to the pilot stage setting, the cam ring is moved toward the center adjusting the flow rate to the plant requirements.
  • In zero flow demand conditions, the pump delivers oil only to compensate any possible bleedings and pilotings, keeping the circuit pressure constant.
  • The compensator response times are very restrained and such as to allow elimination of the pressure relief valve.
  • Also available are the versions with maximum flow adjustment PVA***Q and with the device for selection of two independent pressure values with solenoid valve PVA***M
 
14200 | | | 3D