HVAC PRIME SOURCE, LLC
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HVAC PRIME SOURCE, LLC
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FANS Tips Stalling of vaneaxial fans The vane axial fans are prone to stalling when the air flow is reduced beyond a certain minimum limit due to increased resistance/pressure. The peak of the fan curve for vaneaxial fans is an unstable region, and stalling occurs when the fan is pushed to operating in this region. The stalling results in extreme vibration of the fan which typically results in severe damage to the fans blades and sometimes the entire fan. The most likely cause of fan stalling is some obstruction in the air path, such as due to faulty dampers or other causes. It is best to ensure that a vane axial fan air flow is maintained above a certain minimum limit and away from the fan curve peak, to prevent severe damage to the fan. Centrifugal fan curve characteristics are different from vane axial fans, and they are less prone to the stalling phenomenon.  |
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