Magnetic pumps, also known as magnetic drive pumps, are widely used in chemical, pharmaceutical, electroplating and other industrial fields. With its "zero leakage" design, it has become a star equipment for high-risk media transportation. This article introduces the advantages and disadvantages of magnetic pumps in detail to solve customers' purchase questions!
1. Advantages of magnetic pumps
1. "Zero leakage" design
The magnetic pump completely eliminates the traditional mechanical seal structure and uses a permanent magnetic coupling to achieve power transmission. Its core advantage is that it is particularly suitable for conveying highly corrosive, flammable, and explosive media.
2. Low operating cost
The magnetic pump uses a permanent magnetic structure, there is no contact and friction, the power consumption is small, and the energy consumption is reduced by 20-35%. Under the premise of the working conditions, it can significantly reduce the operating cost.
3. Long service life
Because the magnetic pump has no mechanical friction design, the bearing life is extended by 3-5 times, and the overall service life will be longer.
4. Excellent corrosion resistance
Optional materials include:
- Hastelloy C276 (resistant to 98% concentrated sulfuric acid)
- Polytetrafluoroethylene lining (resistant to hydrofluoric acid)
- Silicon carbide sealing surface (resistant to strong alkali)
II. Disadvantages of magnetic pumps
1. High initial investment cost. Due to the cost of accessories, the price of magnetic pumps is generally 2-3 times that of ordinary centrifugal pumps
2. Medium and temperature adaptability restrictions. Magnetic pumps should pay attention to the following on the medium: solid particle content must be less than 0.1%, viscosity must be less than 500cP, and the temperature range is -20℃～250℃ (special design can reach 350℃)
3. Low efficiency. Due to the limited size of impellers that can be used for magnetic pumps, the flow rate of magnetic pumps is usually lower than that of traditional centrifugal pumps, resulting in relatively low efficiency.
4. The magnetic pump and the motor are connected by a coupling. The coupling requires high precision in alignment. Improper alignment will cause damage to the bearing at the inlet and wear of the single-sided leakage prevention isolation sleeve.
3. Comparison table of key selection parameters
The "zero leakage" advantage of magnetic pumps in terms of safety and environmental protection makes them standard equipment for modern chemical production. Although the initial investment of magnetic pumps is relatively high, the comprehensive benefits brought by magnetic pumps are still very significant through the cost analysis of the entire life cycle such as environmental protection, safety, and energy saving. It is recommended that manufacturers select pumps reasonably according to actual working conditions when purchasing.