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  1. leathal

    exhaust fan for class 1 div 2

    All of our ventillators came from WW Grainger The Axials are number 4C660. The Back inclined fans are 3C494B which has been replaced by 1WBW8. Both have a variety of motor options. One shortcoming to the tube axial is that the fan belt is in the air stream. Our vapors deteriorate the belts...
  2. leathal

    exhaust fan for class 1 div 2

    First, sorry about the delayed response. My week turned to sewage. All my fans are roof top mounted. I have tube axials and back inclined fans. All are belt drive. All have non-sparking aluminum propellers/wheels. All have standard wiring methods. I was not involved with the inspection...
  3. leathal

    exhaust fan for class 1 div 2

    I have several roof top exhaust fans for dip coating machines, lab hoods, and drum containments. All are exhausting vapors from flammable liquids.

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