An evasé  (eee-va-say) is a critical component in industrial fan systems that significantly enhances performance and efficiency. Installed on the fan outlet, it helps improve airflow by providing a natural path for the gas to expand. The evasé  connects to the fan outlet at the smaller flange side and gradually expands outward. While the outer edge of the evasé  expands at a consistent rate, the inner edge expands more significantly, resulting in a much larger flange at the opposite end.

The G Series wheel, part of our pressure blower series, delivers exceptional efficiency. Designed for low-volume, high-pressure applications, this wheel combines a narrow profile with substantial diameter to optimize performance.

Air flows through the intake, slightly wider to ensure smooth entry, then transitions to the narrower section along the blades’ periphery. The curved blade design builds pressure effectively while maintaining impressive efficiency near 70% peak static efficiency.

For low-volume, high-pressure applications, the G Series wheel provides an outstanding option among industrial fans.

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High Pressure SCR Blowers

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At AirPro, we take pride in designing and manufacturing custom fans tailored to our customers’ specific needs. The fan pictured in the video is still in production: but this gives us an opportunity to highlight some of the specialized features we integrate into our custom fan designs. AirPro designed this particular fan for an API 673 application. 

Welcome to AirPro 

Welcome to this virtual tour of AirPro Fan and Blower Company, where we manufacture reliable fans and blowers for our extensive customer base around the world. In this video we provide a bird’s eye view of our three manufacturing locations in Rhinelander, WI and learn about our processes: from design to shipping.  

Reasons for Measuring a Fan 

Generally, there are two reasons to measure a centrifugal fan – the user wants to retrofit the fan (or parts) or replace it with a new fan. In either case, accurate measurements are critical to replicating the system currently in place, especially if no drawing is available. If possible, separate or isolate the fan from the system to access key measurement points. If duct work on the inlet or outlet is in the way, this could impact measurement accuracy. 

Determining the Right Industrial Fan Type

Which industrial fan type do you need in your process to achieve both optimal static efficiency and reliable operation? Considerations include what the fan is processing from clean air to mild particulate to highly abrasive materials, as well as volume and static pressure. Once you know those variables, you can make the fan static efficiency calculation to select the right fan.

Squirrel Cage Blower Wheel with Forward Curved Blades

What some may call a squirrel cage blower wheel is also what we call a forward-curved centrifugal fan. Either way, it gets its name based on the many small blades that make up this fan wheel causing it to look like a squirrel cage or hamster wheel! The result is a blower that moves higher volumes of air and gasses at low pressures for various industrial operations.