Posted by teacher on September 15, 1998 at 15:19:26:
In Reply to: Re: reaced the dreaded 10 in HG vacuum posted by Explain Please on September 15, 1998 at 12:32:14:
vacuum is measured in inches of mercury gage
vacuum on a 0 to 30 scale and is abreviated "in HG"
psig in HG
0 0 no vacuum
-2.45 5 some vacuum
-4.9 10 starting to pull
-7.5 15 half way to perfect vcuum
-14.7 30 pervect vacuum