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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.
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.
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.
The rotating impeller transfers the liquid from the inlet to the outlet port of the pump.
On the pressure side the impeller vanes are compressed and the fluid is discharged constantly from the pump.
What makes impeller pumps outstanding – they do not need to be fi lled prior to operation. Impeller pumps are dry self priming from a depth of three meters. Pre-filling is required for a suction depth of three metres and more. The suction depth is max. 7 metres.
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.
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.
Fluids are transferred absolutely free of pulsation. Smaller amounts of air or other gaseous fluids can be handled on the suction side.
All pumps are tested for continuous operation in our workshop. Top quality materials guarantee for a long durability.
For cleaning and maintenance work the pumps are quickly and easily disassembled. Replacement parts can be ordered individually. Low operation costs!
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.
for water, antifreeze, heat transfer fluid, vegetable oil and grease high impact elasticity and good mechanical strength good for applications involving high pressures up to max. 5 bar.
for hight temperatures, for acids and bases. high elasticity and very good mechanical stability.
preferably used for applications in the food industry. flame retardant, tearproof, durable.
for oil, diesel, fuel oil, palm oil, soy bean oil and oil emulsive wood preservatives very good chemical resistance, less mechanical resistance.
for water, mineral and vegetable oils, diesel fuel, heat transfer fluid and several chemicals. Extremely tear resistant and good mechanical resistance (not suitable for abrasive fluids) maximum fluid temperature 60°C.
A multi-purpose pump designed for transferring clean or contaminated liquids. Not suitable for handling abrasive or corrosive fluids.
A high quality stainless steel pump with numerous applications in industrial plants and production facilities, the appropriate choice for transferring corrosive fluids.
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.
The synthetic pump is for a wide variety of applications in the chemical sector. Perfect for fluids with various viscosities plus agressive acids, bases and solvents.