Date: Mon, 18 Jul 2011 17:56:59 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ILPI <info**At_Symbol_Here**ILPI.COM>
Subject: Re: House Air Pressure
In-Reply-To: <8C28F3F9C0708141A611C73B4D80E70E0D70FD2E51**At_Symbol_Here**VA3DIAXVS461.RED001.local>

I was assisting a customer today and just noticed in the technical drawings that the limit on the WaterSaver Faucet Co lab valves that we sell is 75 psi.  Those look like this: http://www.safetyempo and they are replacements for the older gas cocks that had a limit of 40 psi and look like this: http://www.safetyempor

So, if you are using those types of valves in your system, then you obviously want to stay a few psi under those limits.

Disclaimer: those links are to my company's web site.

Rob Toreki

Safety Emporium - Lab & Safety Supplies featuring brand names
you know and trust.  Visit us at
esales**At_Symbol_Here**  or toll-free: (866) 326-5412
Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012

On Jul 11, 2011, at 11:16 AM, Demer, Frank R - (demer) wrote:

Thank you all for your responses.  This is a great group!

-Frank Demer

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Mike Hurwitz
Sent: Friday, July 08, 2011 7:11 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] House Air Pressure

 We run ours at 150 PSI.  Many of the analytical instruments require
pressures between 80 and 120 PSI.  We run above that and use instrument
specific regulators.  We're also linked to the machine shop, and they
need similar pressures.

 I know that 250 PSI is a pretty standard number.  ASTM which writes the
certification procedures is tiered.  So up to a certain pressure you
fall under one certification and at higher pressures you fall under
another.  Each test is relatively expensive, so manufacturers will
certify up to whatever tier they want.  I can look, but I'm pretty sure
the first tier is at 300.


Does anyone in the group know if there is a specific pressure limit for
laboratory house air pressure?  30 psi?

Frank R. Demer, MS, CIH, CSP
Health Safety Officer
Industrial Hygiene and Safety
University of Arizona
Department of Risk Management Services

Phone:  520.621.3585
Fax:  520.621.3706
Email:  demer**At_Symbol_Here**<mailto:demer**At_Symbol_Here** >
Mailing Address:  P.O. Box 210300, Tucson, AZ  85721-0300
Street Address:  220 W. 6th St., Tucson, AZ 85701 (2nd floor, East Bldg.)
Web Address:

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