How to distinguish between shield pump and magnetic pump?

Shielding pump and magnetic pump several aspects in common: 1, all belong to the vane centrifugal pump. 2, there is no seal, can play no leaks. Difference: 1, shield pump motor is directly connected, the motor rotor and stator with a shield sleeve separated, the motor installed within the cooling structure, can play a cooling motor, the purpose of lubricating bearings. 2, magnetic pump: its motor through the magnetic coupling and the outer magnet together, the impeller and the inner magnet together. Between the outer magnet and the inner magnet with a fully sealed isolation sleeve, the inner and outer magnet completely separated so that the inner magnet in the medium, the motor shaft through the magnet pole between the suction force directly impeller synchronization Turn.