Flux Air-Operated Diaphragm Pumps FDMH 25

The FLUX name has been synonymous with pump technology for more than 70 years. It was the invention of the electric drum pump that sparked it all off. In the meantime, of course, the technology has become more sophisticated. FLUX company innovations have markedly improved working routines for filling and transferring fluids. It is often said that medium-sized companies are the engines of progress.

Air-Operated Diaphragm Pumps FDMH 25

The air-operated diaphragm pump FDM is available in plastic and as metal version. The design ensures a completely oil-free operation. In addition, the pump is available as version for increased pressure (FDMH 25) and for the use in hazardous areas.

The FLUX air-operated diaphragm pump FDMH 25 in injection-moulded and especially designed for pressure increase (3:1). The pump is self-priming and protected against dry running. The pump is distinguished for its versatility and can be used for pumping low to high viscosity media with solid particles, abrasive media, highly flammable media or liquids with high gas content.


  • Moulded version
  • Self-priming even from a dry start
  • Variable delivery rates by adjusting air pressure to the pump
  • No need of by-pass control
  • Fully submersible
  • Unbalanced air valve design eliminates stalling
  • Oil-free operation
  • Regulating valve insensitive to foreign matter in the air


  • Suitable for dry run operation
  • Blockage-free, infinitely adjustable operation
  • Long service life
  • Free of wear
  • Service-friendly operation
  • Versions available for use in hazardous areas


  • Alcohols in pharmaceutical sector
  • Petrol
  • Chlorine bleach
  • Cleaning agents
  • Pickling
  • Waste water


  • Flow rate: max. 85 l/min1
  • Flow pressure: max. 20 bar
  • Operating pressure: max. 7 bar
  • Suction head: max. 3 m1
  • Size of solids: max. 3,2 mm
  • Viscosity: min. 1 mPas - max. 15000 mPas2
  • Housing Materials: Stainless steel
  • Media / Fluids: Highly flammable media, Viscous media, Abrasive media, Aggressive media
  • Connection pressure side: G 1
  • Connection suction side: G 1

Download Data Sheet: Air-Operated Diaphragm Pumps FDMH 25

Ref: flux-pumps.com