Magnetically coupled pumps are a combination of conventional pump hydraulics with a permanent-magnetic drive system and a three-phase motor. This system uses the attraction and repulsion forces between permanent magnets in both coupling halves for contactless and slip-free torque transmission. Between the two coupling halves equipped with magnets is the can separating the product space from the surroundings. The hermetic leak tightness of the magnetically coupled pumps is ensured by a single-acting safety casing. Magnetically coupled pumps are used particularly for toxic, odour-intensive or otherwise hazardous pumped media as the can shields the medium hermetically from the surroundings.