Pros and Cons of Magnetic Drive Pumps
Magnetic Drive Pumps operate somewhat differently to conventional pumps. They’re powered by magnets for a start – a magnet on the drive shaft and another connecting to the impeller drive. The magnet placed on the drive shaft transmits motion to the internal magnet connected to the impeller. The impeller then rotates to move fluid throughout the pump.
A rear casing between the magnets creates a completely sealed “hermetic containment” area which prevents the liquid from accessing the outside, which is useful in applications where the risk of contaminants from leakage of corrosive or combustible fluids or toxic vapors is a threat, or where fluids undergo chemical reactions when exposed to heat or air. Using magnetic drive pumps allows the plant to comply with strict environmental and safety regulations required by the EPA and other regulatory bodies.
Magnetic drives can be found on various pump types such as end suction centrifugal, vacuum or multistage pumps. When deciding if you need a magnetic pump, you should consider the pros and cons of these pumps before making an informed choice.
There are a number of advantages to a magnetic pump that stem from its simple design:
1. Less maintenance: A magnetic drive pump can last over 10 years in normal operations without needing any repairs. Without seals, there are no costs for seal replacement or maintenance, and the associated risk of costly downtime. However, o-rings and bearings can still be checked periodically (even year or two) to ensure there is no wear.
2. Risk of leaks and fines are reduced: Hazardous fluids can be pumped without worrying about leakage or vapor emissions. This allows the plant to avoid the risk of expensive fines from the EPA as well as protect employees from potential risk from exposure to toxic chemicals or explosive fluids.
3. Simplified coupling: As alignment of the pump or motor is not required, coupling is very easy.
4. Reliability: Magnetic drive pumps are reliable and will operate as specified.
1. Magnetic drive pumps only work with clean liquids which makes them unsuitable for applications that involve solids; even a small percentage of solids in suspension means they cannot be used in wastewater applications
2. Magnetic drive pumps are typically more expensive and use more power than conventional pumps, although initial costs are offset by some of their advantages (less maintenance and thus less downtime)
If you’re considering using a magnetic drive pump for your application and are unsure if it’s the best fit for you, call our toll-free number at 1-800- 367-4180. We have experts on hand to help you choose, install, and maintain a variety of equipment.