In recent years, magnetically driven gear pumps have developed rapidly. A great deal of research and development resources have been and will continue to be applied to this technology. The cost of magnet materials will continue to decrease while its strength will continue to increase. Existing magnetically driven pumps have the same reliability as normal pumps, with the weakest parts removed, such as not being sealed here. In addition, the overall price of magnetic drive pumps is on a downward trend. The current design is based on the application of experience developed from. This gives the magnetically driven gear pump a rather simple and robust structure that gives the magnetically driven pump exactly the same reliability as a mechanically sealed pump. As much as possible to extend the interval between the two major repairs is very important, so reliability has become a basic focus of design and development now. Reducing wear between the two magnetic couplings while enhancing cooling means that magnetically driven pumps offer the most optimized solution in more applications than ever before. A typical example is that a manufacturer has adopted a proven patented technology to overcome the resistance loss, overheating and wear of the inner bearing chamber. This is achieved by balancing the pump fluid and the following principle of operation: There are radial holes in the rotor connected to the hollow shaft. During operation, centrifugal force acts on the liquid in the radial bore, creating a negative pressure in the hollow shaft associated with the magnetically driven portion. The pressure differential promotes fluid circulation in two separate cavities behind the rotor, effectively removing the heat generated by friction and magnetic losses. These cavities are connected to the inlet and outlet, respectively. Compared with other magnetically driven pumps, this system retains the pump's original good self-priming capability because "cooling fluid" does not short the inlet and outlet directly. Sufficient cooling liquid is generated independently of the pressure at the inlet and outlet, viscosity and shaft speed. Moreover, one of the more important and unique advantages of this system is that the manufacturer's ROTAN magnetically driven gear pump can be reversed without affecting the operation of its cooling system. Because of the reversal, the flow of liquid in the system is just the opposite of the simple one. In internal gear pumps, it is important to maintain control of the axial clearance (ie, the distance between the rotor end face and the pump head end cap). In the design of the magnetic drive gear pump, the axial gap control is achieved through two face to face thrust bearing to achieve. This design minimizes bearing loads, reducing wear and extending service life. This is also achieved by the above-mentioned cavities that produce hydraulic thrust equal to the forward end of the rotor to maintain the balance. In summary, these design features ensure reduced maintenance times and eliminate the possibility of seal failures that normally result in pump downtime.