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CENTRIFUGAL BLOWERS VS REGENERATIVE BLOWERS - THE BIG DIFFERENCE

 

Thursday, January 28, 2016


Centrifugal and regenerative blowers are widely used in industrial processes. Both can look very similar but there are many distinct differences you should know about these two blowers such as the following:

Configuration of centrifugal blowers 

and regenerative blowers


Distinct differences are clearly seen in the configuration of these two blowers as explained below:

Centrifugal blowers are configured such as its inlet and outlet are perpendicular. The inlet feeds air into the centre of the impeller while the outlet stays in tangential to the rotation of the impeller as shown in the image below. 

centrifugal blowers vs regenerative blowers

On the other hand, regenerative blowers have parallel inlets and outlets that are positioned perpendicular to the rotation of the impeller as illustrated above. 


Impellers and impeller casing of centrifugal 

blowers and regenerative blowers


Centrifugal blowers allow air to enter at the centre of its rotating impeller where a number of fixed vanes acts as paddles that pushes volumes of air to the outlet. Through a centrifugal action, air is forced to the impeller and housing where it is discharged as steady steam through the outlet. This creates negative pressure at the centre hub that sucks in more air. 

Centrifugal blower working principle

Unlike centrifugal blowers, regenerative blowers are fashioned in a different manner. It consists of an impeller that spins within a housing compartment, which contains both an inboard channel and an outboard channel; thus an alternate name given to it as side channel blowers. The moment the impeller spins past the intake import, air is drawn in and is trapped between its impeller blades. As it continues to spin, air is pushed both inward and outward through both of the channels. This continues until the impeller stops rotating. As a result, regenerative blowers can act either as a pressure blower or a vacuum blower.

Regenerative blower operating principle

Maintenance of centrifugal blowers 

and regenerative blowers


In comparison, centrifugal blowers require more frequent maintenance compared to regenerative blowers because of certain parts that requires lubrication, particularly its bearings. Regenerative blowers are considered contact free machines thus it is virtually maintenance free and can operate up to 40,000 hours without the need of being serviced. 

Noise levels of centrifugal and 

regenerative blowers


Regenerative blowers showcase extremely low noise which make it a favourite for noise-sensitive applications. Talk to us to know more about our centrifugal blowers with low noise level for your specific requirement. 


Application to industries of centrifugal 

blowers and regenerative blowers


As a general rule centrifugal blowers are considered low pressure, high flow blowers while regenerative blowers are high pressure, low flow blowers. This makes it ideal for the following industry applications:

Applications of centrifugal blowers


Centrifugal blowers work for applications such as heating a furnace with hot air where a large air volume is required to fill the space. This includes:

  • Climate control
  • Cooling machinery
  • Dryers
  • Dust collectors
  • Exhausting gases and vapours
  • Filter installations
  • Food industries
  • Furnaces
  • Grain elevators
  • Printing machines
  • Hot air blowers
  • Household machines
  • Incinerators
  • Machinery for the food and beverage industries
  • Plastic extruders, laminators, film processing machines
  • Pneumatic transport
  • Pollution control equipment
  • Uniform temperature equipment
  • Textile machines
  • Woodworking machines

Applications of regenerative blowers


Regenerative blowers are mostly used in flammable gas, hazardous duty, industrial air movement, water treatment, and heavy duty transportation applications such as:

  • Aquaculture/pond aeration
  • Chip removal for engraving equipment
  • Dust and smoke removal
  • Industrial vacuum systems
  • Packaging applications
  • Pneumatic conveying
  • Printing presses
  • Spas and dryers
  • Sewage aeration
  • Soil vapour extraction
  • Vacuum lifting
  • Vacuum packaging
  • Vacuum sintering and casting

Pneuvay Engineering distributes Spencer centrifugal blowers and regenerative blowers. Talk to us at 1800 786 642 to know how we can deliver these to your business.

 
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