Magnetic pumps can be classified from multiple dimensions, and the main classification methods are as follows:

1. Classified by structural form and support method (most commonly used classification)
This is divided based on the layout of the inner magnetic rotor, bearings, and isolation sleeve, which determines the reliability, maintainability, and applicable working conditions of the pump.

Metal isolation sleeve magnetic pump

Features: The isolation sleeve is made of high-strength, low conductivity metals such as Hastelloy, titanium, tantalum, etc.

Advantages: High mechanical strength, strong pressure bearing capacity (suitable for high-pressure conditions), wider temperature resistance range.

Disadvantages: It can cause eddy current loss (resulting in reduced efficiency and insulation sleeve heating), and is not suitable for transporting ultra pure or iron ion contaminated media.

Application: High pressure and high temperature processes in chemical and petrochemical industries.

Non metallic isolation sleeve magnetic pump

Features: The isolation sleeve is made of engineering plastics (such as PFA, PTFE), ceramics, or composite materials.

Advantages: No eddy current loss at all, high efficiency, isolation sleeve does not generate heat; Absolute anti-corrosion, no metal ion pollution.

Disadvantages: The mechanical strength and pressure bearing capacity are relatively low, and the temperature resistance is limited by the material.

Applications: Semiconductors, photovoltaics, pharmaceuticals (ultrapure water, chemical transportation), laboratories.

3. Classified by medium lubrication and cooling methods
Internal circulation type: The vast majority of magnetic pumps use this method. By relying on the pressure difference inside the pump, a small amount of conveyed medium flows out of the high-pressure area of the pump chamber, passes through the pump shaft, bearings, and magnetic vortex area for lubrication and cooling, and finally returns to the low-pressure area of the pump chamber. The structure is simple, but the medium must have basic lubricity and cleanliness.

External circulation type: Set up an independent external cooling circulation system. Introduce coolant (which can be another clean fluid) through external pipelines to forcibly cool and lubricate the bearings and isolation sleeves.

Advantages: Suitable for conveying media with high temperature, easy vaporization, high viscosity, or containing solid particles, it can effectively prevent cavitation and particle wear, and has higher reliability.

Disadvantages: Complex structure and high cost.

Application: harsh working conditions such as heat medium, resin, asphalt, slurry, etc.

4. Classification by impeller type and fluid characteristics
Centrifugal magnetic pump: the most common, using centrifugal impellers, suitable for low viscosity, clean liquids.

Eddy current magnetic pump: The impeller is an open type eddy current impeller, suitable for conveying media containing small particles or easily producing gas, with slightly better wear resistance.

Volumetric magnetic pumps (such as magnetic gear pumps, magnetic screw pumps): used when measuring or transporting high viscosity media (such as grease, polymers), they also use magnetic transmission to achieve no leakage.