Blowers and Fans

Blowers and Fans - An Overview

Most manufacturing plants use fans and blowers for ventilation and for industrial processes that need an air flow (or any other gas, for example Biogas or Bio Gas). Fan systems are essential to keep manufacturing processes working, and consist of a fan, an electric motor, a drive system, ducts or piping, flow control devices, and air conditioning equipment (filters, cooling coils, heat exchangers, etc.).

The US Department of Energy estimates that 15 percent of electricity in the US manufacturing industry is used by motors. Similarly, in the commercial sector, electricity needed to operate fan motors composes a large portion of the energy costs for space conditioning.

Fans, blowers and compressors are differentiated by the method used to move the air, and by the system pressure they must operate against. The American Society of Mechanical Engineers (ASME) uses the specific ratio, which is the ratio of the discharge pressure over the suction pressure, to define fans, blowers and compressors.

At TMC Fluid Systems, we specialize in the manufacturing, design, and supply of Blower and Compressors capable of delivering Pressure Systems up to 14-PSI and higher when required.

See chart below:


Specific Ratio

Pressure Rise
(mmWG) (psi)
 Fans < 1.11 1,136 1.6
 Blowers 1.11 to 1.20 1,136 to 2,066 1.6 to 3.0
 Compressors > 1.20 < 10,000 <14.0






 For more information, select from one of the following:

  • Aqua-Series Blower: Typically used for Aeration offering 100% Oil Free Air Delivery. These blowers are also used in Aquaculture/Fish Farming and Hydroponics industry.
  • Biogas Blower: Special design of Biogas (Bio Gas) Blowers used to either convey or boost the pressure of Biogas. Also used with Specialty Gases such as Natural Gas.
  • Centrifugal Blower: Centrifugal Blowers are constant flow blowers and when operated at a constant speed will supply a constant volume of air.
  • Regenerative Blowers:Regenerative Blowers are machines that move air by way of a non-positive displacement. The method by which regenerative blowers move the air, however, allows some air passing over a blade of the impeller to slip past it. This air is moved forward by another blade. 
  • Tri-Lobe Blowers: Tri-Lobe Blowers are Rotary Air Blowers that have three lobe tips exposed at 120o around the rotor.
  • Turbo Blowers: Turbo Blowers are a fairly new introduction to the traditional faqmily of blowers and fans. They are capable of delivering larger flow rates at higher differential pressures,
  • Twin-Lobe Blowers: Twin-Lobe Blowers are also Rotary Air Blowers that have two lobe tips exposed at 180o around the rotor.
  • Water-Cooled Blowers: Water-Cooled Blowers are High Pressure Blowers capable of achieving Differential Pressures of up to 14-PSIG


  1. Waste No Waste: Time to Embrace Biogas
  2. Is Big Gas finally learning to love biogas?
  3. We need to get behind Renewable Natural Gas
  4. Difference between a Turbo and Positive Displacement Blower
  5. The Difference between Methane and Natural Gas
  6. First Dairy Biogas Project in Connecticut
  7. Does Renewable Natural Gas Have a Future in Energy?
  8. Biogas Offtake Opportunities For Digesters
  9. Wisconsin Dairy Begins Production of Renewable Natural Gas
  10. Anaerobic Digestion Sector Forming a Clearer Picture
  11. Brightmark to Expand Western New York Dairy Biogas Project
  12. Biogas - The Energy Wonder That's Under Our Noses
  13. Power Generation Achieved by a Self-Assembled Biofuel Cell
  14. Less Carbon Dioxide from Natural Gas
  15. Project Uses Renewable Electricity for RNG Production
  16. Smithfield Hog Farm Provides Natural Gas to Missouri City
  17. From Waste to Gas
  18. Gas Clash Threatens Australian Export
  19. Maximizing Opportunities of Anaerobic Digestion from Wastewater
  20. Catalyst to Speed up Conversion of Biomass to Biofuel
  21. How It Works: Ethanol
  22. Anaerobic Digestion - the Next Big Renewable Energy Source
  23. Anaerobic Additions
  24. Three (3) Tech Solutions for Modern Landfills
  25. The Costs and Benefits of Anaerobic Digesters
  26. Bacteria Farts Power Wastewater Plant in Fort Wayne
  27. Europe’s First Poultry Manure Biogas Plant
  28. Electricity Using Pig Manure
  29. $38-Million Biodigester coming to Grand Rapids
  30. Biochar Could Benefit Anaerobic Digestion of Animal Manure

For additonal reading, please visit us at: News Worthy

Difference between a Turbo and Positive Displacement Blower