Pump F 424 / FP 424

Sealless in the medium area

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The sealless pump F/FP 424 is ideal for transferring various low-viscosity, also aggressive media. It is suitable for media that flow quickly and neither bond, crystallize nor are abrasive. With this pump you can empty drums, IBCs and also basins. Distinct feature, only at FLUX: The specific construction with spiral-shaped guide bearing in the inner tube prevents unwanted deposits in the pump and increases the service life significantly. The pump is available in stainless steel, polypropylene or polyvinylidene fluoride. The F/FP 424 in stainless steel can also be used in hazardous areas.


  • Application areas: Ex  

Technical data:

  • Flow rate: max. 240 l/min1
  • Delivery head: max. 30 mwc1
  • Viscosity: min. 1 mPas - max. 1200 mPas1
  • Outer tube diameter: min. 40 mm2 - max. 50 mm2
  • Immersion length: 700, 1000, 1200
  • Materials outer tube: Polypropylene, Polyvinylidene fluoride, Stainless steel
  • Media / Fluids: Acids, Alkalis, Petroleum products, Highly flammable media, Solvents, Fuels, Aqueous salt solutions, Aggressive media
  • Seal: sealless
  • Container: Small containers, Hobbocks, 200 l drums, 1000 l IBC
  • 1 dependent on pump model, motor and medium
  • 2 dependent on pump model

Product attributes

  • No seal in the liquid area
  • Long spiral-shaped guide bearing
  • Multiple beared drive shaft
  • Radial shaft seals prevent the intrusion of vapours and liquid in the coupling area
  • Versions for the operation in hazardous area available
  • Version free of non-ferrous metal for transferring AdBlue® available
  • Can be combined with various motors as required


  • No seal wear
  • Optimal emptying of the inner tube
  • High service life
  • Low wear of guide bearing and shaft
  • Long life circle of bearings
  • Particularly suited for hydrochloric acid and chromic acid
  • Can be temporarily operated against closed valve (hand nozzle, valves etc.) until the indicated temperature of the materials is reached
  • Low vibration
  • Stainless steel version for use in hazardous area
  • Versions for use with AdBlue® also available
  • Appropriate motors

    Commutator motors
    FEM 4070
    Delivery rate max. 215 l/min
    Delivery head max. 26 mwc

    F 457 / F 457 EL
    Delivery rate max. 220 l/min
    Delivery head max. 30 mwc

    F 458 / F 458 EL
    Delivery rate max. 200 l/min
    Delivery head max. 23 mwc

    F 460 Ex / F 460 Ex EL
    Delivery rate max. 200 l/min
    Delivery head max. 23 mwc

    F 458-1 / F 460-1 Ex
    Delivery rate max. 220 l/min
    Delivery head max. 28 mwc

    Brushless motor
    FBM 4000 Ex
    Delivery rate max. 220 l/min
    Delivery head max. 30 mwc

    Three-phase gear motor
    F 414
    Delivery rate max. 185 l/min
    Delivery head max. 21 mwc

    Compressed-air motors
    F 416 Ex / F 416-1 Ex / F 416-2 Ex
    Delivery rate max. 240 l/min
    Delivery head max. 30 mwc

  • Media examples

    Outer tube polypropylene:
    Hydrochloric acid, boric acid, sulfuric acid, citric acid, lactic acid, phthalic acid, sodium hydroxide, potassium hydroxide, ammonia water

    Outer tube material polyvinylidene fluoride:
    Hydrobromic acid, chromic acid, chloric acid, hydrofluoric acid (hydrofluoric acid), battery acid, nitric acid, nitrous acid, sulfuric acid, acetic acid to 80 %, methyl sulfuric acid, perchloric acid, peracetic acid, phosphoric acid, potassium (Javelle water), sodium hypochlorite (sodium hypochlorite), sodium chloride (table salt), potassium chloride, sodium sulfate, sodium carbonate

    Outer tube material stainless steel:
    Petroleum, diesel, heating oil, hydraulic oil, engine oil, engine oil, gasoline, formic acid (85 %), ethyl glycol, petroleum, "MEK (methyl ethyl ketone = butanone), octane, ethanol, methanol, butanol, acetan, toluene, isobutanol, propanol, xylene, urea solutions, white spirit, diesel

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