DIFFERENCE BETWEEN MAGNETIC DRIVE AND PERISTALTIC HOSE PUMPS

What are the differences between magnetic drive and peristaltic hose pumps?

Choosing between a magnetic drive pump and a peristaltic pump largely comes down to the fluid you are wanting to pump and the type of application.

Magnetic drive pumps use magnets to turn the drive shaft while peristaltic pumps use the compression of a tube or hose to create suction.

Let’s take a look at exactly how these two pumps differ and what their unique advantages and disadvantages are.

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How does a magnetic drive pump work?

Magnetic drive pumps work differently from most other pumps. They are a type of centrifugal pump but instead of a shaft being connected from the motor to the impeller, they use magnets to rotate the impeller. Because magnetism is used, there is no need for actual physical contact between the drive shaft and the impeller. A hermetically sealed area therefore prevents fluids from leaving the pump.

This frictionless design has a number of advantages, which we’ll discuss down below, but it’s greatest asset is being able to move corrosive liquids without any leakage.

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Working principle of magnetic drive pumps

Advantages of magnetic pumps

  • low maintenance, lasts years without needing anything replaced
  • low leak risk, retains all vapors inside the system making it a good option for hazardous fluids
  • extremely reliable
  • coupling is easy as it is not necessary to align the pump and motor like in other pump designs

 

Disadvantages of magnetic pumps

  • cannot run dry
  • doesn’t handle fluids containing large solid content

 

How does a peristaltic hose pump work?

Peristaltic pumps work using a principle known as peristalsis. This term comes from biology and refers to the way our muscles contract and relax to move fluids around our digestive tract.

In essence, peristaltic pumps work, not by creating pressure differences through an impeller or drive shaft, but through the contraction and expansion of a tube or hose.

The tube or hose is compressed in places through a series of rollers or pressing shoes that rotate. When the rollers press into the tube, they push fluid and any air out of that segment of the tube or hose. This creates a vacuum. When the rollers pull away from the tube and it relaxes, the vacuum sucks new fluid into that section.

This process is repeated over and over to push and pull fluid, transporting it to its destination.

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Working principle of peristaqltic hose pumps

Advantages of peristaltic pumps

  • no valves, glands, or seals to replace
  • most maintenance only requires replacement of the tube or hose
  • gentle pumping suited for shear sensitive materials
  • handle corrosive materials well
  • self-priming and can dry run
  • flow can be reversed to clean lines or blockages
  • accurate dosing for sensitive materials

 

Disadvantages of peristaltic pumps

  • pulsing flow that isn’t suitable for applications where consistent flow rate is required
  • relatively high power usage due to the drive motor continually squeezing the tube

 

If you need any help  selecting a magnetic drive or peristaltic hose pump for your tough pumping challenge, contact one of our experts today.

 

Tags: Magnetic Drive Pumps, Peristaltic Hose Pumps, centrifugal pumps

NOT SURE WHERE TO START

Guide To Selecting the Best Pump

If you need some guidance on how to select the right pump then you’re not alone! There’s such a wide range of pumps in Australia, from centrifugal pumps to hose pumps to diaphragm pumps. The options available to you can make it a difficult choice, so we’ve created this special guide to help step you through the process of selecting the ideal pump for your requirements.

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