How to convert inches of Vacuum to PSI for gas compression?

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How to convert inches of Vacuum to PSI for gas compression?

Postby Guest » Wed Apr 30, 2008 3:12 am

I am in the natural gas compression industry but have not dealt with inches of vacuum. There are several sizing programs used to do this but I do not know the conversion. Any help would immensely appreciated.


Postby Statzman » Wed Apr 30, 2008 3:13 am

I posted this but did not know I wasn't logged in. Again, thanks to any help given.
Posts: 1
Joined: Wed Apr 30, 2008 3:06 am

Postby Guest » Wed Apr 30, 2008 4:26 am

Well, vacuum gets into the whole gauge vs absolute pressure. For vacuum, absolute pressure is still positive, but gauge pressure is negative.

But inches as a pressure unit most likely referes to inches of mercury

1 std atm = 101.325 kPa = 760 mm Hg = 29.92 in Hg = 14.696 psi

There is a slight possibility it could refer to inches of water, usually "in WC" for inches water column. 1" WC = 249.09 Pa.

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