Reply by nutsandbolts

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Posted on Harbor Freight 2 hp dust collector questions

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20 posts in 3123 days

#1 posted 03-06-2021 08:44 PM

  • two fans in parallel will increase volume of air movement at the same static pressure (lift)
  • two fans in series will increase static pressure (lift)

If you are moving dust particles (sanding operation) you need sufficient velocity, to keep the dust airborne inside the piping. Airflow (cfm) = Area (cross sectional area – square feet) x Velocity (ft per minute). However, there is no free lunch. Velocity will be limited by head loss (friction). Joints add head loss (unions, tees, wyes). Flexible hose has more head loss. Smooth pipe has less head loss. Total length of straight piping adds to total head loss.

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