Magnetic drive impeller SCHAERER Spare Parts 3328955000

A magnetic drive impeller transfers rotation from an external motor into a sealed fluid chamber without a rotating shaft seal. The external motor spins a drive magnet; the drive magnet pulls a matching magnet inside the chamber, turning the impeller blades. Because no shaft penetrates the chamber wall, the risk of leaks or contamination is removed, making the design particularly suited to food-safe and high-purity applications such as coffee machines and beverage dispensers.

The operator installs the impeller into the designated housing inside the machine, ensuring the internal magnet aligns with the external drive magnet. Once the housing is sealed and the motor activated, the impeller rotates continuously, drawing liquid through the inlet, accelerating it across the blades, and discharging it under pressure. The flow rate and pressure depend on motor speed and impeller geometry, but the sealed magnetic coupling maintains isolation of the fluid path throughout.

This impeller is precision-moulded in food-grade polypropylene, a material chosen for chemical resistance, low moisture absorption, and dimensional stability across repeated thermal cycles. The absence of metal parts in contact with the fluid eliminates corrosion and metallic taint, while the sealed magnetic coupling removes the need for lubrication or maintenance of a shaft seal.

Cleaning follows from the sealed construction: the impeller itself is removed from the housing, rinsed under running water, and brushed to clear any residue. The housing is wiped or flushed separately. No disassembly of the magnetic coupling is required, and no lubricants or sealants are used, so upkeep is limited to surface cleaning and visual inspection for wear or fouling.

The article number 3328955000 identifies this specific impeller as a spare part for SCHAERER professional coffee equipment. It is listed in the beverage-machine spares section of the catalogue.