Pumps that are powered by magnets are known as Magnetic Driven Pumps. Because the shaft of these pumps does not protrude from the pump casing, shaft sealing devices such as gland packing or mechanical seals are not required. An external magnet is installed on the driving shaft of magnetic-powered pumps.
It is responsible for conveying motion to a PFS Pump internal magnet that connects to the impeller (s). The impeller(s) turns, causing fluid to flow through the pump. A back case separates the two magnets, creating hermetic isolation of the liquid with no access to the outside world. A Magnetic Driven Pump, often known as a mag drive pump for short, has two magnets, one on the outside of the pump chamber and the other on the inside.
Their sturdy construction makes them perfect for handling extremely corrosive fluids, and they are commonly employed in the chemical sector. Instead of a pump shaft passing through the outside casing, Magnetic driven pumps have a hermetically sealed chamber and a seamless design, making them airtight and decreasing the possibility of fluid or vapor leakage.
This is especially helpful for enterprises pouring expensive chemical goods into the production environment that they can’t afford to risk spilling. There are also centrifugal, regenerative turbine, vane, and OEM magnetic driven pump types that combine the working principles of these pumps with the benefits of magnetic driven pumps.
Magnetic driven pumps are a type of magnetically driven chemical process pump that does not require shaft sealing. Because there are no mechanical seals, seal-fluid pots, or cooling lines, the pump’s original cost as well as day-to-day operating costs are considerably reduced.
A magnetic connection operates via the isolation shroud to link the motor and pump drives. This implies that no fluids or gases may escape in either a direct or indirect channel, posing a risk to operators and the environment. Because of its wide range of uses, this type of pump contributes to process engineering technical standardization.
Close-coupled and long-coupled (frame-mounted) magnetic driven pumps are also available. Magnetic driven pumps have been around for a long time and are perfect for use with clean liquids. Their apparent benefit in chemical applications is that they do away with the necessity for potentially costly mechanical seals. The link between the motor and the impeller is referred to as magnetic drive.
The impeller is powered by a shaft directly attached to the motor in typical sealed centrifugal pumps, and the location where the shaft enters into the pump housing incorporates a mechanical seal to keep the liquid contained within the pump. Magnetic driven pumps, on the other hand, use a set of magnets powered by the motor to drive magnets enclosed within the impeller. The impeller is encased in a shroud that contains a shaft and bearings that allow it to operate on a shaft.
HOW DO MAGNETIC DRIVEN PUMPS WORK
The linked magnets are mounted to two concentric rings on the pump housing on either side of the containment shell. The outer ring is connected to the motor’s drive shaft, while the inner ring is connected to the impeller’s driven shaft.
Each ring is made up of roughly the same number of identical, matching, and opposing magnets, which are positioned with alternating poles around the ring. Rare earth metals, such as samarium or neodymium, are frequently alloyed with other metals to create magnets. Samarium-Cobalt and Neodymium-Iron-Boron are the most prevalent pairings.
The liquid is pushed through the pump by two magnets acting in tandem; the first magnet is fastened to the motor shaft with specialized glue or grub screws. The second magnet is housed within the pump and is encased in either high-grade thermoplastic or metal.
A shell separates the two magnets while simultaneously keeping the pumped medium confined. The associated external magnet rotates as the motor shaft rotates as power is given to it. Because the magnets have different polarities, the internal magnet rotates in lockstep with the exterior driving magnet. This internal magnet is connected to the pump’s impeller.
The spacing between the magnets determines the greatest torque that may be obtained in a magnet driven pump: the narrower the gap, the greater the torque transfer. However, because the gap must include the containment shell and any protective layers protecting the magnets, there is a limit to how small this may be constructed. The rotational elements of the pump must have a reasonable distance between them and the containment shell for safe operation, especially if the pumped fluid is viscous or includes particles. For maximum efficiency, all parts must be machined to tight tolerances.
The inner magnet ring, pump shaft, and bearing are all submerged in the pumped fluid, which lubricates them. It’s critical that these components are built to work well in a variety of environments. Friction losses can be considerable with very viscous liquids, and bearing wear can be an issue in an abrasive or chemically aggressive medium. Magnet drive pumps, on the other hand, are suitable for handling aggressive, corrosive, and hazardous liquids when the correct wetted materials are used, such as silicon carbide, thermoplastics, stainless steel, and high nickel alloys.
There is no need for a seal in magnetic driven pumps since there is no direct connection between the electric motor shaft and the impeller. There is minimal danger of leakage unless the pump case is damaged. Seals are known to cause pump excursions and unscheduled shutdowns. Seals definitely improve pump performance, reliability, and availability significantly.
Because the potential of leaking is eliminated, liquids may be pumped without spilling. By removing the seals, you also decrease the friction loss, wear, costs, and noise that they cause. This enables complete liquid separation from the pump drive and enhanced motor power delivery to the pump. Magnetic driven pumps come in a variety of materials and metallurgies, both metallic and nonmetallic.
ADVANTAGES OF MAGNETIC DRIVEN PUMPS
Where leaking of the pumped liquid poses a significant risk, such as with aggressive or hazardous liquids, unusual compounds, acids, alkalis, corrosives, pollutants, and toxins, magnetic driven pumps are commonly utilized. They are also used for ultra-pure liquids and difficult-to-seal liquids.
Sealed pumps used in these types of services may leak over time or require elaborate, expensive double seals to prevent hazardous/challenging chemicals from escaping into the atmosphere, resulting in safety hazards, downtime, and greater maintenance expenses. Difficult liquids are another major use for magnetic-driven pumps; for example, some liquids can crystallize on seal faces, resulting in seal failures. A permanent flush system should be run to the seal to avoid this.
Fluid and vapor emissions are exceedingly unlikely to leak due to the architecture of Magnetic driven pumps. People working on or near the pump are therefore protected from dangerous, corrosive, flammable, and/or explosive fluids, as well as other harmful compounds. Furthermore, pricey liquids are not squandered.
Pumps that are powered by magnets are also dependable. When you choose a reputable brand, you can rest assured that the pump will perform as expected. This sort of pump requires relatively minimal maintenance. The design is actually pretty basic, which is the main reason. In reality, when used for regular operations, magnetic driven pumps can last for ten years or longer before requiring any form of maintenance. Another significant advantage of magnetic driven pumps is that they do not require alignment of the pump or motor due to their simple connection.
Less maintenance: In normal operation, Magnetic driven pumps may endure for over ten years without requiring any repairs. There are no charges for seal replacement or maintenance without seals, and there is no chance of costly downtime. However, O-rings and bearings should be examined on a regular basis (at least once a year) to ensure that they are not worn.
There is less risk of leaks and fines: Hazardous fluids can be pumped without fear of leakage or vapor emissions. This allows the facility to avoid costly EPA fines while also protecting personnel from dangerous chemicals and explosive fluids.
Kiron Hydraulics Needs Private Limited, in collaboration with our Principal Dickow Pumps, offers a full solution for your Magnetic Driven Pumps requirements. These pumps are made using high-quality components and cutting-edge machinery under the supervision of qualified personnel. Corrosion resistance, ease of installation, good performance, sturdiness, and extended service life are all advantages of these items. We provide these pumps in a variety of technical parameters and may tailor them to meet the demands of our customers within a reasonable time frame.