The difference between the shield pump and the magnetic drive pump lies in the sealing grade, although the characteristics of both are to avoid medium leakage during operation, but compared with the shield pump, the sealing performance of the magnetic pump is more reliable, the pump cost is higher, suitable for the transportation of high-risk nature of the gas liquid, is a higher level of safety of the transportation equipment, details can see the following content.
The difference between the shield pump and the magnetic pump is not only reflected in the sealing performance, in the working principle will not be different, the shield pump in the structure design is relatively compact, do not use a coupling, so the overall relatively small, the use of isolation sleeve to seal the effect, the advantage is that it can deal with the medium containing metal particles, and the magnetic pump is mainly used to transport pure liquid. However, the advantages of the magnetic pump are reflected in the thickness of the isolation sleeve is better, the kinetic energy transfer mode is safer, has good heat dissipation performance, and the more stable anti-leakage performance can be assured for the transportation of flammable and explosive high-risk liquids.
Magnetic pump uses magnetic force to achieve contactless power transmission, both safety and service life are higher than the shield pump, in the production cost is higher than the general centrifugal pump and shield pump, but can be trusted to fire, chemical, petroleum and other fields, more reliable sealing performance can greatly ensure the safety of the transportation process, not only can transport a variety of high-risk acid, alkali toxic liquid, In the processing of flammable, volatile gas liquids, including precious metals liquid can ensure stability without leakage.
The difference between the shield pump and the magnetic pump is also reflected in the structural design. Different from the magnetic pump using magnetic coupler, the shield pump mostly uses the coaxial structure of the motor and the pump, and adopts the static seal design to provide a fully sealed environment for the transportation process. Under the action of the isolation sleeve, the medium and the moving components are separated, so as to realize no leakage transportation, and no lubricating oil is added in the actual drive. Compared with magnetic pump, whether the cost or maintenance costs are relatively low, belongs to the economical type of pump.
After understanding the difference between the shield pump and the magnetic pump, for the user, mainly according to the transportation needs to choose the corresponding pump type, in short, if the transport medium is more harmful, the natural selection of magnetic pump in safety concerns, and if the transport medium itself is no harm, for environmental considerations need no leakage transmission, then choose the shield pump.
