Xref: utzoo sci.electronics:7036 sci.physics:8950
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hplabs!kitty!larry
From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics,sci.physics
Subject: Re: Looking for a source of discount/second hand pressure regulators
Summary: CO2 regulators...
Keywords: regulators compressed_gas
Message-ID: <3301@kitty.UUCP>
Date: 21 Jul 89 03:24:01 GMT
References: <423@cbnewsi.ATT.COM>
Distribution: usa
Organization: Recognition Research Corp., Clarence, NY
Lines: 38

In article <423@cbnewsi.ATT.COM>, fiesta@cbnewsi.ATT.COM (eric.c.beck) writes:
> I'm looking for a refurbished, surplus, or used pressure regulator for
> use with a 10 pound CO2 tank.  I believe a regulator capable of withstanding
> 2000 PSI of input pressure is suitable for this application.  A 30 to 50
> PSI output pressure would be perfect for my application.
> 
> If you know of a supplier of discount or surplus regulators, or have
> one that you want to part with, please let me know.

	I'm sorry that I can't help you with any "discount" sources for
such a regulator, but I can provide you with some other information.

	In my travels, I see CO2 supplied in K, Q and F cylinders which
contain, respectively, about 3, 20 and 60 pounds of liquified gas under
a pressure of around 830 psig.  A lecture bottle contains about 0.5 pound
of CO2.  I don't know of any 10 pound cylinders, but this may be a size
used in the beverage industry.

	I would use caution before trying a surplus regulator on CO2,
unless either you or someone with experience _knows_ that the regulator
is good.  A defective regulator could, under the right circumstances,
cause injury.

	Some CO2 regulators are electrically heated to prevent freezing
in high volume delivery applications; you may wish to bear in mind that
a non-heated regulator can freeze in a CO2 application.

	Also, beware that some CO2 cylinders are designed for _liquid_
CO2 withdrawl, and consequently have internal eductor tubes.  Such a
tank would be inappropriate for use with a gas-phase regulator.  For
this very same reason, CO2 tanks for gas-phase withdrawl MUST be kept 
upright - otherwise liquid CO2 will escape into the regulator with
highly undesireable results.

<>  Larry Lippman @ Recognition Research Corp. - Uniquex Corp. - Viatran Corp.
<>  UUCP   {allegra|boulder|decvax|rutgers|watmath}!sunybcs!kitty!larry
<>  TEL  716/688-1231 | 716/773-1700  {hplabs|utzoo|uunet}!/      \uniquex!larry
<>  FAX  716/741-9635 | 716/773-2488     "Have you hugged your cat today?"