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A.0100.301 – IM-FIP/08.00 EN (02/2014)
1.4 Function and operating principle
The impeller pump is designed for circulation, transport, emptying, filtration and dosing of
liquids.
The pumps are self-priming. The suction capacity is related to speed, viscosity and pipe
dimension. An untight suction pipe will reduce the suction capacity considerably.
The impeller pump can handle both high and low viscous liquids as well as liquids
containing solid particles, air and gases.
1.4.1 Operating principle
Due to the eccentric interior cross-section
of the pump body, a partial vacuum is
created as the volume increases between
the flexible impeller wings at the inlet port.
The resulting suction draws the liquid into
the pump.
The rotating impeller carries the liquid from
the inlet towards the outlet port. During this
part of the cycle, the volume between the
wings remains virtually constant. The
distance between the wings allows fairly
large solids to pass through the pump
without any harm being done to the liquid.
The liquid is discharged from the pump in
a continuous, uniform flow when the wings
bend, thus decreasing the volume between
them, as they come into contact with the
flattened part of the eccentric interior walls
of the body.
Liquids can be pumped in the opposite direction by reversing the rotation of the pump.
