Varisco Usa Inc. 704-399-0589 moc.ocpocsalta.ti@ocsirav.tropxe |


Self-priming trash pumps

Ideal for pumping with large solids in suspension. They are used in purification plants and sewage systems to provide a completely safe management and maintenance.




How it works

The air (yellow arrows) is drawn into the pump due to the negative pressure created by the moving impeller and is emulsified with the liquid (blue arrows) contained in the pump casing.

The air-liquid emulsion is forced into the priming chamber where the lighter air is separated and leaves through the discharge pipe; the heavier liquid drops back down into circulation.

Once all of the air has been expelled from the suction pipe, the pump is primed and works like a normal centrifugal pump.


  • Rapid self-priming without foot valve. Once filled with water, the pump is automatically primed to a height of 7.5 m.
  • Total safety for operators
    Being placed outside and above the liquid to be pumped, inspection and maintenance of the pump are made easier, with greatly reduced health and safety hazards for personnel

Two vanes open impeller handling up to 3” (76 mm) solids.

Easy maintenance: back pull-out rotating assembly which can be removed without dismantling the pipes or pump casing.


Heavy duty casing in GJS 400 ductile iron

Easily opened priming, drain and impeller inspection covers

GJS 400 ductile iron or CF8M stainless steel open impeller with large solids handling

Easily replaceable cast iron wear plates with abrasion and oil resistant rubber facing

Product range

5 models
H max = 40 m c.a
Q max = 600 m3/h
Model PortsĀ 
ST-R2 2"
ST-R3 3"
ST-R4 4"
ST-R6 6"
ST-R8 8"




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