F 426 Barrel Mixer Pump

For mixing and/or pumping

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The F 426 is ideal for mixing and/or pumping inhomogeneous media in open or closed drums. Keep media moving that tend to separate, even during pumping. With the outlet closed, e.g. via a hand nozzle or blanking plug, the F 426 can be temporarily operated as pure barrel mixer. By turning the manual lever, the pump can be easily adjusted between "mixing" or "pumping" modes. The pump is easy to dismantle for rapid cleaning and is suitable for many applications - available in stainless steel 316 or polypropylene, with a wide choice of o-ring materials . The stainless steel version is ATEX certified for use in hazardous areas.  1000 or 1200 mm long versions available for use with 200 litre drums, barrels or 1000 litre IBC's.


  • Application areas: Atex  

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
  • 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

  • Perfect for mixing and transfer of inhomogeneous liquids
  • Two manual control levers open/close the mixing ports
  • Mixing ports allow liquid backflow for mixing back into the container
  • Mechanical seal for inner tube protects bearings from abrasive particles
  • PP version with unique steel cored inner tube for optimal driveshaft and seal support
  • Can be used with electric or compressed air motors
  • Max viscosity 1200 cP with most powerful drive motor
  • Max density 1.8 with most powerful drive motor


  • 3 operating modes in one barrel pump:
    - Transfer
    - Transfer with simultaneous mixing
    - Mixing only
  • Functions switchable during operation
  • Easy to dismantle for cleaning
  • Unique steel re-inforced inner tube on PP model for increased strength and mechanical seal support in all operating temperature ranges
  • Temporary operation against closed valve e.g. hand nozzle, ball valve, possible (until the indicated max. operating temperature has been reached)
  • Stainless steel version ATEX certified for handling low flashpoint liquids
  • Suitable for continuous running, heavy duty operations