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Magnetic drive pumps are sealless pumps that use a coaxial magnetic coupling to transmit torque to an impeller. A standard electric motor drives a set of permanent magnets that are mounted on a carrier or drive assembly. In turn, the magnets drive the inner rotor and provide the no-slip or synchronous capability of the torque coupling. There are two basic types of magnetic drive pumps: rotating driven shaft and stationary shaft. Rotating shaft magnetic drive pumps are usually made of metal and include a pressurized recirculation circuit to help prevent vaporization of the liquid required to lubricate the bearings. Stationary shaft magnetic drive pumps typically use non-metallic components such as ceramics and plastics and are best suited for light to medium duty applications.


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