All about Magnetic Drive Pumps

Pumps that need little maintenance and perform a variety of tasks efficiently are the most appropriate devices in the industrial domain. Magnetic drive pumps are an example of such a device. They are seal-less Horizontal Centrifugal Pump that pass torque to an impeller through a coaxial magnetic coupling feature. These pumps are very energy efficient, and they can handle a wide range of fluids, including oils, caustics, and acids. A magnetic drive pump is expensive as compared to a standard centrifugal pump.

Feature & Applications

Magnetic pumps are used in a variety of industries, including irrigation, beverages, manufacturing, refineries, chemical refining, and other government-run industries. These pumps are fully leak-proof, however not ideal for materials with high viscosity or solid content. Since these pumps do not use the traditional shaft coupling system, the pump’s casing is fully sealed from the drive end. There is no chance of leakage, malfunction, or output loss in this case since there is no mechanical seal. These pumps are commonly used in the pharmaceutical and chemical industries because they are leak-proof and avoid common contamination issues.

As a result, they’re also used to move dangerous materials and expensive chemicals. They prevent the motor from slipping and ensure that the maximum motor horsepower is converted into pumping power. The internal portion of magnetic pumps is usually made of high-grade plastics, metals, and ceramics. Depending on the components, the temperature range at which these pumps operate varies greatly. Nonetheless, there are various types of pumps available on the market, including stationary shaft and rotating shaft pumps.

Magnetic drive pumps depend on the force of magnets to operate. Since the shaft of these pumps does not protrude from the pump casing, shaft sealing devices such as gland packing or mechanical seals are not needed.

An external magnet is mounted on the drive shaft of magnetic drive pumps and is responsible for transmitting motion to a PFS Pump internal magnet that connects to the impeller (s). The impeller(s) rotates, causing fluid to flow through the pump. A rear casing separates the two magnets, resulting in a hermetic enclosure of the liquid with no access to the outside.

Magnetic drives can be used on a variety of pump models, including end suction centrifugal pumps, self-priming multistage pumps, vacuum pumps, and so on.

Operations & Maintenance 

1. It is not recommended that the pump’s filters be mounted before the pump’s inlet.
2. Since it does not self-prime, the pump should have flooded suction.
3. To moderate the cleaning of air, the pump should be worked in a short ten-cycle burst while priming.
4. Ensure there are no blockages or leaks in the associated documentation when conducting this procedure.
5. Do not run the pump for more than 30 seconds against a closed valve.
6. To prevent the motor from overheating, ensure that the pump’s casing is properly ventilated.
7. Never use the pump when it’s completely dry.
8. When the pump fluid deposits in the internal section of the machine, it is important to clean it on a regular basis. This can be done with the help of a suitable cleaning agent.

All the pumps are designed with a positive or dynamic displacement theory in mind. Magnetic pumps, for example, use the concept of magnets to produce various motions.

Key Advantages

There are distinct advantages and disadvantages of both conventionally powered and magnetically driven pumps that should be thoroughly understood before making a decision. Here we are discussing few prominent advantages, such as

• No Leakage: Fluid and vapor emissions are highly unlikely to leak due to the nature of magnetic drive pumps. People working on or near the pump are therefore protected from poisonous, corrosive, flammable, and/or explosive fluids, as well as other toxic chemicals. Furthermore, expensive liquids are not squandered.
• Reliability: Magnetic drive Pumps are reliable. When you choose a reputable brand, you can rest assured that the pump will perform as anticipated.
• Low Maintenance: This form of pump needs very little maintenance. The design is very basic, which is the main reason. In reality, when used for regular operations, magnetic drive pumps will last for ten years or longer before requiring some kind of maintenance. Even so, fixes are frequently low-cost.
• Simple Coupling: Another significant advantage of magnetic drive pumps is that they do not require alignment of the pump or motor due to their simple coupling.

Summing Up,

Magnetic drive pumps can handle a wide range of viscosities at high and low temperatures, with capacities ranging from ml/hr to m3/min, as well as high device and differential pressures.

With the advancement in pump technology, Engineers have been able to reduce the size of magnetic drive pumps while increasing their strength and performance. Pump lifetime has been increased, power losses due to eddy currents have been decreased, and maintenance downtime has been reduced, thanks to new pump bearing designs and a wide variety of wetted material choices.