You have changed bags in your dust collector, repaired all the pulse valves and repaired worn ductwork, but your dust collector is still not performing the way it had when you purchased it.  The problem may not be in the dust collector, it could be in your fan.

A number of simple steps can be taken the could improve the fan performance:

 Have you checked your dampers?  Be sure any dampers at the fan inlet or outlet are set to the correct position.  If you have recently changed out a bad actuator the limits could not be set properly.  Make sure that no other dampers have been closed.  You should also check to ensure the damper blades have not loosened and are misaligned.  Any of these items could contribute to a loss in volume.

Have you checked your inlet connections?  Have expansion joints deteriorated?  Are there holes in the ductwork?  Any of these issues can be leaking air and robbing air from the system.

Is a vibration analysis part of your maintenance routine for your fans?  Excessive vibration and noise can be loose or worn belts, damaged or unbalanced wheel.  Any of which can contribute to a low volume.

How often do you check your tension on your v-belt drive?  If your belts are slipping you could be losing speed in your fan which could contribute to, not only  pre-mature belt failure, but also lower volume and/or pressure.

It is best to have a continued maintenance program to check out the operation of your fan on a daily, weekly, monthly and quarterly basis.  Check your maintenance manual for the dust collection system or fan to develop a program that will work for you and your company.

Need help?  Call ETA Engineering 800-988-2656 to schedule a professional dust collector inspection.

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