FP 424 Seal-less ATEX pump

Sealless atex pump in the medium area

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Seal-less atex pump F/FP 424 is ideal for transferring low-viscosity, aggressive or flammable liquids. It is suitable for free flowing non-abrasive liquids that do not bond or crystallize. This pump is suitable for emptying drums, IBCs, tanks, vessels and basins. Flux F/FP 424 is the class leading heavy duty design, fitted with unique spiral-shaped guide bearing inside the inner tube.  This provides superior driveshaft support, increasing service life, minimizing vibrations and preventing build-up of unwanted deposits in the pump. The pump is also available in stainless steel, polypropylene or polyvinylidene fluoride. The F/FP 424 in stainless steel is ATEX approved (to standard 2014/34/EU) for use in hazardous areas.

Technical data:

  • Flow rate: max. 240 1
  • Delivery head: max. 30 mwc1
  • Viscosity: min. 1 mPas - max. 1200 mPas1
  • Outer tube diameter: min. 40 2 - max. 50 2
  • 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: Seal-less in liquid area
  • 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
  • Unique spiral-shaped guide bearing provides optimal driveshaft support
  • Class leading 24 mm heavy duty shaft bearings
  • Strong 6 mm diameter driveshaft ensures little of no deflection at high speeds
  • Two radial shaft seals prevent intrusion of vapours and liquid in the coupling area
  • Highly resistant ETFE impellers as standard
  • ATEX pump for operation in hazardous area available
  • Version free of non-ferrous metal for transferring AdBlue® available
  • Suitable for high temperature applications
  • Can be combined with various motors as required


  • No seal wear
  • Optimal drainage of the inner tube
  • Longest service life
  • All parts available to buy as spares
  • Low wear of guide bearing and shaft
  • Reversible driveshaft effectively doubles life
  • Stainless steel ATEX pump available for use in Zoned areas
  • Can be temporarily operated against closed valve (hand nozzle, valves etc.) until the indicated temperature of the materials is reached
  • Low vibration
  • 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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