Principles of operation

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.

 

 

 

The advantages of an impeller pump

► Dry self priming
What makes impeller pumps outstanding – they do not need to be filled prior to operation. Impeller pumps are dry self priming from a depth of three meters. Pre-filling is required for suction depth of three metres and more. The suction depth is max. 7 metres.
► High capacity
Depending on type and model our pumps are capable of transferring from between 3 litres up to 730 litres per minute. Tanks will be drained down to the last drop.
► Versatile
Useful for many different fluids and applications. Materials of impellers, seals and pump housings can be selected according to the individual needs and applications required. ZUWA Impeller Pumps are available with AC and DC motors with various revolutions per minute.
► Gentle
Fluids are transferred absolutely free of pulsation. Smaller
amounts of air or other gaseous fl uids can be handled
on the suction side.
► reliable
All pumps are tested for continuous operation in our workshop. Top quality materials guarantee for a long durability.
► Easy maintaining
For cleaning and maintenance work the pumps are quickly and easily disassembled. Replacement parts can be ordered individually. Low operation costs!
► sturdy
Impeller pumps will readily pump fluids with a wide range of viscosity, even highly viscous liquids such as oil or honey (up to 20 000 mPAS) as well as liquids containing solids.The approved media temperature is max. 90°C. A short dry-run of up to one minute can be tolerated

 

Pumps

Unistar

 

Fluids
► water, seawater
► waste water
► diesel fuel, biodiesel
► vegetable oils
► heating and motor oil
► detergents
► antifreeze
► heat transfer fl uid
► cooling lubricants

 

Combistar

Fluids
► descaler
► grinding emulsions
► coolant
► lime water
► diluted soluble oil
► galvanising sludge
► waste oil
► cooling lubricants

 

 

Unistar Drill

Fluids
► water, seawater
► waste water
► diesel fuel, biodiesel
► vegetable oils
► heating and motor oil
► detergents
► antifreeze
► heat transfer fl uid
► cooling lubricants