Advantages of Using a Magnetic Drive Pump Magnet

The Magnetic Drive Pump Magnet uses a magnetic field to create the movement of fluid. This is a variation of the centrifugal pump and can be used for many different applications. The liquid is pumped through the system by rotation of the impeller (or any other device that displaces the liquid) as it passes through the magnetic field. The pumped liquid can be reused for lubrication of the bearings, cooling or other purposes.

The basic principle is that the liquid is pumped by a pair of coupled magnets, one is located on the motor shaft and another is encapsulated in either a high grade thermoplastic or metal within the pump and connected to the impeller. When the two magnets are positioned in close proximity, they generate a powerful magnetic field that penetrates through the pump casing.

Typically the motor shaft is mounted on a bushing assembly and hermetically sealed in the pump casing to form a hermetically closed unit. The internal magnet is then encapsulated in the same high grade thermoplastic or metal and abrasion resistant bearings are attached to the shaft.

There are many advantages to using a Magnetic Drive Pump Magnet over a conventional mechanical seal pump, these include:

Leak Proof Design

With a magnetic drive pump, there is no need for a shaft seal as the wet end of the pump is essentially separated from the motor. This means that there is no risk of leaks unless the casing is broken or damaged, which is a huge advantage for companies that have hazardous chemicals to pump.

Zero Fugitive Emissions

As well as saving companies from costly maintenance, a mag drive pump also prevents dangerous fugitive emissions in the process of pumping. This is particularly important when it comes to the pumping of alkali and caustic liquids, which can contain vapours that can be harmful to humans or the environment.

Long Life Performance

A key feature of magnetic drive pumps is the use of a highly durable sleeve bearing assembly that can withstand a wide range of operating conditions and is not compromised by heat from dry running. These modern bearings are up to twice harder than silicon carbide.

Solids Handling Capability

A magnetic drive pump can be designed to handle a variety of liquids, but it is important to remember that if the liquid contains ferrous particles or other solids then this will contaminate the magnetic elements and may lead to the failure of the magnetic drive. There are various ways of dealing with this; including the insertion of a rotor/stator to break up the solids.

Available in a Wide Range of Materials and Metallurgies

Magnetic drive pumps are manufactured in a wide range of metallurgies and materials including cast iron / ductile iron, 316 stainless steel, Hastelloy, and many other materials. All these materials are able to provide the required levels of corrosion resistance, which is why they are popular in so many applications.

As well as being hermetically sealed to prevent leakages, magnetic drive pumps are also known for their extremely long lifetime. They are a great choice for chemical process applications and can also be used in many other industries as well.