Differences between magnetic and rotary pumps

　　Magnetic pumps and rotor pumps in a number of significant differences, these differences are mainly reflected in the working principle, sealing performance, scope of application, service life and structural features.

　　First, the working principle

　　Magnetic pump: Magnetic pump is a kind of non-leakage pump that uses magnetic force to transfer power. Its working principle is through the magnetic coupler to the motor power transfer to the impeller, so as to realize the work of the pump. The magnetic coupler consists of two magnets inside and outside, the inner magnet is fixed on the motor shaft, the outer magnet is fixed on the pump shaft, the two magnets interact with each other through magnetic lines of force to transfer the power from the motor to the pump shaft, thus driving the impeller to rotate. Since there is no mechanical contact between the inner and outer magnets, there is no leakage problem.

　　Rotor pump: Rotor pump is a form of volumetric pump, consisting of a rotating rotor and a stationary pump body. It has no suction and discharge valves, through the relative motion between the rotor and the pump body to change the working volume, and through the extrusion of the rotor to discharge the liquid, while leaving space on the other side to form a low-pressure, so that the liquid is continuously sucked in.

　　Second, sealing performance

　　Magnetic pump: Magnetic pump has good sealing performance, due to the design of magnetic coupler, no mechanical seal is needed between pump body and motor, so it can realize leakage-free operation. This feature makes the magnetic pump especially suitable for conveying corrosive and toxic and harmful media, which can effectively avoid pollution of the environment and harm to human beings.

　　Rotor pumps: Although rotor pumps also have a certain sealing performance, but its sealing effect is usually not compared with the magnetic pump. Rotor pumps usually need to prevent liquid leakage through mechanical seals, which may have certain risks when dealing with corrosive or toxic media.

　　Third, the scope of application

　　Magnetic pumps: Magnetic pumps are widely used in chemical, pharmaceutical, electronic, food and other industries, especially suitable for conveying corrosive and toxic and harmful media. Due to its non-leakage characteristics, magnetic pumps have significant advantages in these areas.

　　Rotor pumps: Rotor pumps are also suitable for a variety of industrial fields, such as petroleum, chemical, pharmaceutical, food and so on. It is particularly suitable for conveying media containing solid particles and liquids with high viscosity. However, when dealing with corrosive media, the sealing performance of rotor pumps may become a limiting factor in their application.

　　Four, service life

　　Magnetic pumps: Because the internal structure of magnetic pumps is relatively simple and there is no mechanical contact part, their service life is relatively long. Generally speaking, the service life of magnetic pumps can reach 5-10 years, depending on the conditions of use and maintenance.

　　Rotor pumps: the service life of rotor pumps is relatively short, generally around 3-5 years. This is because the internal structure of the rotor pump is relatively complex, and the impeller and other moving parts are prone to wear and failure after long-term operation.

　　V. Structural characteristics

　　Magnetic pumps: magnetic pumps have a compact structure, small size, light weight, and low operating noise. These features make magnetic pumps have high convenience in installation and maintenance.

　　Rotor pumps: Rotor pumps are also relatively compact, but their size and weight may vary depending on the specific model. Rotor pumps usually have high self-priming capacity and precise flow control, and are suitable for applications requiring precise flow control.

　　In summary, magnetic pumps and rotor pumps differ significantly in several aspects. In practical applications, users should choose the appropriate pump type according to the specific needs and working conditions.