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Gear pumps built in three pieces with an extruded body in high resistance aluminium alloy.

WHISPER is a new and original technology protected by international patents and applied to a family of external gear pumps and motors that feature low noise emissions.

The wide choice of shafts, flanges and ports, in compliance with all international standards (SAE, DIN and EUROPEAN) allow for their use in an infinite variety of applications.

Displacements from 0.07 in³/rev (1,12 cm³/rev) to 2.13 in³/rev (34,98 cm³/rev) available in groups 10 and 20.     

Max. peak pressure up to 4350 psi (300 bar).     

Max. speed up to 4000 min-1
Features
  • High efficiencies
  • Low noise emission
  • Integrated outboard bearings for heavy duty applications
  • Multiple units
  • Custom design

Specifications

Construction

  • External gear pumps and motors 3-piece construction

Mounting

  • EUROPEAN - SAE - GERMAN standard flanges

Ports

  • Threaded or flanged

Direction of Rotation (Looking on Drive Shaft)

  • Anti-clockwise (S) - clockwise (D) - reversible external drain (R - L) reversible internal drain (B)

Inlet Pressure Range for pumps

  • 0,7 ÷ 3 bar abs. (10 ÷ 44 psi) If p > 1,5 bar abs. (22 psi) specific shaft sealing have to be applied. Please consult our pre-sales department.

Maximum Back Pressure for Single Rotation Motors

  • 5 bar (73 psi) continuous @ min. speed 350 min-1
  • 1 bar (14.5 psi) continuous @ Max. speed

Maximum Drain Line Pressure on Reversible Rotation Motors

  • 5 bar (73 psi) continuous @ min. speed 350 min-1
  • 1 bar (14.5 psi) continuous @ Max. speed

Maximum Back Pressure on in Series Motors

  • 150 bar (2175 psi)

Fluid

  • Mineral oil based hydraulic fluids to ISO /DIN. For other fluids please consult our pre-sales department

Viscosity Range

  • From 12 to 100 mm² /s (cSt) [60 to 456 SSU] recommended
  • Up to 750 mm² /s (cSt) [3410 SSU] permitted

  • Building & Construction 
  • Material Handling 
  • Agriculture 
  • Forestry 
  • Turf care & Mowers 
  • Fan Drive

Documentation

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