Knowledge of pumps

 

Magnetic drive pumps and centrifugal pumps are two common types of pumping equipment. They are different in structure, working principle, characteristics of use, and scope of application.

 

Structural difference

Centrifugal pump

Centrifugal pump usually consists of a motor, pump body, impeller, seal and other components, the motor drives the impeller to rotate at high speed, and the liquid is transported by centrifugal force.

Magnetic pump

The magnetic pump cancels the mechanical seal, uses the magnetic vortex generated by the internal and external magnetic to drive the impeller, and the internal and external magnetic rotor transmits power through the magnetic coupler to achieve no leakage transport of the medium.

 

Working principle

Centrifugal pump

Centrifugal pumps use impeller rotation to generate centrifugal force, suction liquid from the inlet and discharge from the outlet.

Magnetic pump

The magnetic pump transmits power through the magnetic coupler, and the magnetic interaction between the inner magnetic cylinder and the outer magnetic cylinder makes the impeller rotate synchronously, and the medium is in a closed state throughout the whole process to prevent potential leakage.

 

Usage characteristics

Centrifugal pump

Centrifugal pumps are simple and compact, suitable for high-flow transportation, and can be manufactured with corrosion-resistant materials, but there may be mechanical seal leakage problems and relatively low efficiency.

Centrifugal pumps are widely used in the transport of clean water, pure water and other liquids, as well as some specially designed centrifugal pumps can transport suspension and bulk solid suspension.

Magnetic pump

The magnetic pump has the advantages of zero leakage, no independent lubrication and cooling water, static seal of the pump shaft, overload protection, etc., but the price is relatively high, and it is not suitable for transporting media containing particles.

The magnetic pump is suitable for transporting flammable, explosive, volatile, toxic and valuable liquids, especially for industries with more stringent safety standards.