ZUWA IMPELLER PUMPS UNISTAR, COMBISTAR AND NIROSTAR

DRY SELF-PRIMING UNIVERSAL PUMP FOR MANY LIQUIDS

Impeller pumps by ZUWA are especially easy to maintain and cheap to run. Thanks to the flexible impeller the pumps are capable to move solid content or convey highly viscous fluids.

The running wheels (impellers) in our impeller pumps are available in different, always flexible materials to meet the requirements of many fluids. The impellers are not arranged centered in the elliptical housing. Due to the rotation of the impeller and therefore the bending of the impeller's blades a vacuum is created which sucks in the liquid. Because our impeller pumps are self-lubricating, only a rather short dry run is possible. After utilisation a longer dry-run is possible, but not recommendable.

ZUWA impeller pumps are available in several sizes with several drives and are made drom stainless steel, aluminum or plastic. We provide impellers made from NBR, EPDM, CR, FKM, FPM and TPU.

Our impeller pumps can be used with different drives: electric motors, air motors, belt drive, hydraulic motors, with a power drill or a cordless drill with an adapter.

HOW DOES AN IMPELLER PUMP WORK?

Flexible impeller pumps are displacement pumps. The rotor with flexible vanes is mounted concentrically in a circular housing which has a flattened area at one side. This provides the eccentric path for the impeller, thereby squeezing the flexible blades on this side

1. SUCTION

The impeller rotation and the straightening of the vanes upon leaving the cam creates a vacuum on the suction side drawing the fluid into the pump chamber.

2. TRANSFER

The rotating impeller transfers the liquid from the inlet to the outlet port of the pump.

3. PRESS

On the pressure side the impeller vanes are compressed and the fluid is discharged constantly from the pump.

UNISTAR

A multi-purpose pump designed for transferring clean or contaminated liquids. Not suitable for handling abrasive or corrosive fluids.

COMBISTAR 

This pump is particularly suitable for all fluids containing abrasives. It is an economic alternative to the NIROSTAR series for transferring abrasive or slightly corrosive fluids.

Nirostar

A high quality stainless steel pump with numerous applications in industrial plants and production facilities, the appropriate choice for transferring corrosive fluids.