HomeProductsHarben High Pressure PumpsHi-Q (High pressure diaphragm pump)

Hi-Q (High pressure diaphragm pump)


The Harben Hi-Q high pressure diaphragm pump is capable of pressures up to 4,000 psi and flows to 25 gpm. It is available in a 4 cylinder format requiring up to 75 hp depending upon the pressure and flow configuration chosen.

Drive power can be diesel or electric and we have a range of gearbox ratios to suit all requirements5

The Hi-Q has a unique mode of operation that keeps all the moving parts inside the pump separated from the pumped fluid. The video below clearly shows the simplicity of operation which delivers some significant advantages over more traditional direct acting pumps.

  • No packings or seals to wear out
  • Pump can run dry without damage
  • Suitable for a large range of low viscosity fluids
  • Pumps low lubricity fluids with ease
  • Has multi-cylinders therefore minimal pulsation
  • High power to weight ratio
  • Simple to pressure compensate
  • Frost tolerant

The Harben high pressure diaphragm pump is used in numerous pumping applications because they are efficient, reliable and easy to maintain.

  • Water jetting
  • Drain cleaning
  • Hydrostatic testing
  • Umbilical flushing & HPU’s
  • Hot steel descaling
  • Water hydraulic systems
  • Hydrostatic testing
  • Umbilical flushing

Looking for higher pressures or flows? Click HERE to see our Century pump range

Looking for lower flow? CLICK HERE for our P Type range of high pressure diaphragm pumps


  • High flow and pressure characteristics
  • Unrivalled reliability and low running costs
  • 4 Cylinders configuration provides smooth output
  • Run dry without damage
  • Filtration to 150 microns
  • Pump low lubricity fluid with ease
  • Simple to pressure compensate
  • Compact and lightweight