Drum pump for mixing and/or pumping

F 426

Branch: IndustrieBranch: OberflächentechnikBranch: PetrochemieBranch: LandwirtschaftBranch: Wasser-/AbwasseraufbereitungBranch: Farben und LackeBranch: Chemie

The Drum pump F 426 is ideal for mixing and/or pumping inhomogeneous media. You can keep media moving that tend to segregate, even during pumping. With the outlet closed, e.g. via a hand nozzle, the F 426 can be temporarily operated as pure mixing pump. By turning the adjusting lever, the pump can be easily adjusted to "mixing" or "pumping". The pump is easy to dismantle for rapid cleaning. The pump is available in stainless steel and polypropylene. The stainless steel version can also be used in hazardous areas.


  • Application areas: Ex  

Technical data:

  • Flow rate: max. 240 l/min1
  • Delivery head: max. 13 mwc2
  • Viscosity: min. 1 mPas - max. 1200 mPas2
  • Outer tube diameter: min. 41 mm3 - max. 50 mm3
  • Immersion length: 1000, 1200
  • Materials outer tube: Polypropylene, Stainless steel
  • Media / Fluids: Acids, Alkalis, Highly flammable media, Petroleum products, Solvents
  • Seal: with mechanical seal
  • 1 The maximum delivery rate is a test bench value, measured with water at 20 ° C at the pressure port of the pump, without accessories (hose, nozzle, flow meter). The practically achievable delivery rate is lower. It depends on the individual application, the fluid properties and the pump configuration. Please refer to technical data sheets / performance diagrams.
  • 2 dependent on pump model, motor and medium
  • 3 dependent on pump model

Product attributes

  • Mixing and/or  conveying of inhomogeneous liquids
  • Two control levers to easily open/close  the mixing openings
  • Mixing openings allow backflow of medium for mixing back into the container
  • With mechanical seal for inner tube seal
  • Inner tube with metal core at PP
  • Can be combined with various motors as required


  • 3 operating modes in one pump:
    - Conveying
    - Conveying with simultaneous mixing
    - Temporarily mixed operation
  • Switching operating modes is possible even while operating
  • Easy to dismantle for cleaning
  • Distinct feature, only at FLUX: The inner tube is reinforced with a metal core on the PP model. It prevents leakage and unnecessary wear of the mechanical seal in all operating temperature ranges
  • Temporary operation against closed valve (e.g. hand nozzle, ball valve) is possible (until the indicated max. operating temperature has been reached. 
  • Stainless steel version can be used in hazardous area