Working principle

On applications where the pumped media contains a mixture of

air and liquid in the suction line, airscrew rotation causes the

formation of a continuous liquid ring within the canister. Due to the

eccentric position of the canister relative to the airscrew, an air

chamber forms between the liquid ring and the airscrew, which

separates into air pockets between the air-screw vanes.

The continuous rotation of the airscrew forces air pockets through

the canister into the suction stage of the impeller which are then

pumped out via the discharge.

Liquid is returned from the discharge via the recirculation pipe into

the canister to ensure the liquid ring is maintained at all times.

When there is no air present, the canister and recirculation loop

have no function and are fully filled with liquid. The liquid passes

through the canister into the suction stage of the impeller,

allowing the pump to act as a traditional centrifugal pump.