Magnetic drive pumps are designed for pumping toxic chemicals, as they are completely sealed. The impeller is driven by magnetic force rather than a shaft, therefore removing the need for a mechanical seal.
Unlike most centrifugal pumps that rely on a mechanical seal that are liable to fail at some point in the pumps life, magnetic drive pumps are completely sealed. The impeller is enclosed in a hermetically sealed casing and motor power is transmitted via a magnetic drive system, to the impeller. Magnetically driven seal-less pumps are driven by a set of inexorably coupled magnet sets that are divided by the casing of the pump. The outer magnet set is joined to the drive shaft and the inner magnet set is joined to the impeller. When the outer magnets turn, this causes the inner magnets to turn and the impeller.
The basic principle of a magnetic drive pump is exactly the same as a standard End suction pump, that is the most widely used pump in the world and are simple, effective and reliable. In a standard set up the liquid enters the pump via a horizontal pipe, goes through the impeller and – using centrifugal force – is flung out a vertical discharge.
End Suction Pumps are generally suited to transfer and high flow applications. Pressure can be limited as they typically only have one impeller. The most common uses of the Magnetic drive end suction centrifugal pump include toxic water, bulk chemical transfer, fine chemical processing, pharmaceutical, petroleum and petrochemical pumping.