Re: Exploding Vacuum Cleaner

Posted by Bus Driver on January 20, 2005 at 10:16:09 from (66.226.35.201):

In Reply to: Exploding Vacuum Cleaner posted by tim(ny) on January 20, 2005 at 09:43:22:

The vacuum motor has brushes which spark while running. Many vacuums pass the air from the intake hose past the motor. This could cause an explosion. But if the tank is truly dry, blowing lots of air INTO the tank for a few minutes with all openings really open and then immediately using the vacuum should be OK. The concentration of fumes should be less than required for spark ignition. The air/fuel mix will be below the "lower explosive limit", LEL, or if it was an engine, we would say the mixture is too lean. The exhaust from the vacuum will not create an explosion if used to blow out the tank.

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