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Air blowers for high volume & pressure/vacuum
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Roots and ring blowers

Nonameside channel blowers

We supply a range of blowers such as roots type (positive displacement) blowers, ring blowers (side channel/regenerative) and fans. For most water-related (aquaculture) applications a regenerative blower is sufficient, but where higher volumes and or pressures are needed, we have roots blowers to service this function.

Blower parmeters and specifications

Due to the large number of models and applications, so be able to quote properly, please advise:

  • Brief description of your application;
  • City or altitude of application;
  • Air volume required (e.g. cubic meters per hour or liters per minute);
  • Air pressure needed

With this information, we can select a suitable blower for your application. Some specialized industrial applications will require a skilled engineer to determine the air pressure needed. Any pressure unit can be provided, although we prefer millibar. USA documents usually report pressure in PSI.

The positive displacement and regenerative blowers serve in both vacuum and air delivery applications.

Blower types include, centrifugal blowers (turbo blowers), multi stage blowers, cooling fans, pressure exhaust fans, dust collectors, roots blowers, side channel blowers, diaphragm blowers, vacuum pumps, and battery operated blowers.

Examples of ring blower applications:

  • Medium sized shrimp/fish hatchery, aquaculture
  • Printing and drying
  • Biogas boosting
  • Textiles
  • Painting
  • Dust collecting
  • Bottling industry
  • Sewage treatment industry
  • Vacuum and suction applications





Examples of roots blower applications:

  • Large shrimp hatchery
  • Pneumatic conveying system (food, mining etc.)
  • Combustion air supply for cement kiln
  • Waste water treatment
  • Biogas boosting
  • Various industrial factory applications

Silent single phase and three phase regenerative (ring) blowers

Regenerative (ring) blowers can perform both an air delivery and vacuum function. For both, there is a maximum volume and a maximum pressure, so you need to select your blower knowing your usage as pressure (or vaccum) and volume needs to fall within these two parameters. Altitude also affects blower selection, especially high altitudes like Johannesburg. This type of blower is also referred to by other names such as Regenerative blower, Ring Compressor, Side channel blower or Vortex Blower.


Here, the one blower on the red line deliver a maximum volume of 80 m3 per hour and a maximum pressure of just over 120 mbar. At 120 mbar, it will deliver 20 m3/hr. Therefore, first calculate the pressure (e.g. water depth, friction losses) you will work at and then determine the air volume that you require.

working parts of blower

ring-blower-sA range of capacities and 220 volt and 3 phase, 380 volt models are available. These blowers require no maintenance and do not use oil. Deliveries from 0.6 m3/min to 25m3/min are available. In terms of kilowatts these range from 0.15 Kw to 15 Kw. Pressure delivery as mm H20 (milliliters of water head) ranges from 500 mm to 3,500mm. Current amperage ranges from 1.2 to 47 Amp.

Download pdf general specification sheet for ring blowers.

See our specialized side channel blower curves.


Applications and advantages

Regenerative blowers are suitable for all those applications requiring considerably higher pressures than that which can be achieved using centrifugal fans. Side channel blowers are used in all those applications requiring an operating vacuum or pressure higher than the one achievable by a fan, but not as high as to require the use of a vacuum pump. The rotating parts are not in contact with the casing. There is therefore no friction during operation and thus no internal lubrication is necessary. The gas moving through the machine therefore remains uncontaminated and completely oil-free. The main feature are:

  • easy installation
  • low noise level
  • no vibration and therefore complete dynamic stability
  • minimal maintenance (runs on two or 3 bearings)
  • Simple Maintenance
  • 100% Oil Free Air
  • Suitable to environment protection
  • Small size


For air pressure units conversion, see


email ecotao for more information:  Cellular: 0823903989 | Landline: 021-9115835 |  0861428716
VAT 4590247682 Ecotao Enterprises cc CK 2001/053814/23 39 Olienhout Avenue, Plattekloof 3, Cape Town 7500 South Africa
We deliver throughout South Africa and neighboring countries.

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