A pump is a device that moves fluids by mechanical action, from one place to the other.
There are different ways to classify the pumps, for example, according to their mechanical configuration and their working principle, pumps could be divided into two major categories: dynamic pumps and displacement pumps.
In another way, pumps could also be categorized into two major groups: mechanically sealed pumps and seal-less pumps. The first group contains pumps that need a seal system, usually in the form of a mechanical seal. While in the second group includes all types and models of seal-less pumps, shaft seals like mechanical seals are not needed.
Magnetic drive pumps, also known as magnetically coupled pumps, use two sets of permanent magnets. The first set of magnets (drive magnet) is attached to the shaft which is connected to the motor. As the motor turns on, the shaft rotates and spins its magnet(drive magnet)), producing magnetic force, making the magnet attached to the impeller(driven magnet) spin and rotate the impeller.
The shaft protecting sleeve is fitted to the shaft and it is to protect the pump shaft against mechanical damage caused by shaft seals, bearing shells and also against chemical damage caused by aggressive fluids.