Paul Stubbs on tue 7 oct 03
It sounds like overkill to me the volume of air removed when de airing =
clay is quite small.
What you need to concider is a machine that will evacuate to 20/25 =
inches of mercury. My first machine came from a company supplying =
equipment for laboratories its was of the rotary vane type (1 1/2" =
diameter inside) and ran off a 1/4 hp motor and was more than adequate
The current one is of the same type and was used on a milking machine =
the smallest made for that purpose.(approx 3" dia) its way bigger than =
it needs to be.but is self regulating by virtue of the condition of the =
vanes and general leaks in the air line. It is important to have a =
filter in the line to keep grit from doing harm to the pump.
It is as David Hendley suggests feasible to have an automatic bleed =
valve to regulate pressure should you need too.=20
Good luck.
from: Paul
Subject: PUG MILLS AND VACCUM PUMPS
Is there any potential problems in using a vaccum pump that is way more
powerful than needed for a pugmill? The first one i bought from a used
machinery dealer was pretty strong, but they lost it before i had time =
to
pick it up. Since i still had the receipt, they said i could pick out
another one, so i naturally decided on the best one i could find, which =
i
later found out is a two-stage 40cfm pump that lists for over $3000. The
only thing i can think is it may have a tendency to clog the line with =
clay
because of the force involved, but i don't know that this would really
happen. Any thoughts on this from the engineers out there? thanks,
Paul B
Falmouth, Ky
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