industrial water pump / electric / self-priming / compact
521 series Watson-Marlow Fluid Technology Group



  • Media:

    for industrial water

  • Operation:


  • Priming:


  • Other characteristics:

    compact, rugged, stainless steel

  • Flow:

    Max.: 276 m³/h (9,746.848 ft³/h)

    Min.: 0.0005 m³/h (0.1321 ft³/h)

  • Pressure:

    2 bar (29.008 psi)


521 close coupled pumps offer IP55 ingress protection for light industrial environments. They offer rugged, industrial pumping, with all the pumphead features of cased drives, but at the lowest whole-life cost.

520REL low-pressure LoadSure element pumphead features large swept volume with sprung rollers for high accuracy

Chemically-resistant polyphenylene sulphide track and rotor, and stainless steel rollers and bearings

Low rotational speeds greatly increase tube life and system reliability

Clutched rotor for rapid, effortless tube loading

Rugged, tool-unlockable guard