Surgeless Fan Design for Vibration Protection Under Pressure

If you’ve ever seen, heard or felt a pressurized industrial fan pulsing, you’ve probably also seen how damaging the resulting vibrations can be. Surgeless fan design moderates volume to avoid that costly scenario.

Understanding Surge Cause & Effect in Industrial Fans and Blowers

Surge, which only happens in medium- to high-volume pressurized fans and blowers, is a condition in which the fan pulses.

Fans operate on an efficiency curve based on airflow volume (CFM) and pressure (in. WG). When the fan approaches the top of the curve in a pressurized application, too much system pressure can cause pulsing back and forth across the peak as the fan “searches” for more pressure than it is capable of producing at its operating speed.

You’ll recognize this condition by the characteristic “whoosh” noise the airflow makes when the fan is surging. Once the fan is in a surge state, the resulting vibrations can literally rattle and shake your fan apart.

Protecting Your Application with Surgeless Fan Design

Because surge only exists in pressurized fans at medium and higher volumes, we can prevent the condition through surgeless fan design. We do this by controlling the volume to accommodate airflow from zero CFM all the way up to the fan’s designed airflow capacity, with no unstable operating points along the complete static pressure curve.

Hear it from the Application Engineer

Senior Application Engineer Chet White demonstrates surgeless fan design and implications in this 1-minute video

When you’re ready to start your project, reach out and connect with one of our application engineers to discuss the details of your specification.

Content Related to Surgeless Fan Design

There are many factors to consider in every industrial fan application. We’ve seen it all. Here are related pages and posts that might be of interest as you think about your application:

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