The cheap ones aren't adjustable, preset for about 175. And on our high pressure storage jobs, with working pressure in the 165-185 PSI range, these would p all the time, so we use the 100-300 adjustable ones and adjust them to 200 +/-.
If you're wondering why we're comfortable with up to 185, understand we hydro at 10% above the code minimum on every job, and sometimes more. On a large freezer, we had between 255 and 265 on everything for between 48 hours and a week- we WANT to find any leaks and so we set the bar a little higher than others do. We also use a lot of high-pressure devices so that the heads 40' in the air aren't seeing >175. glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of douglas hicks Sent: Friday, January 23, 2009 8:42 AM To: [email protected] Subject: Re: pressure relief valve Good morning George. The tag on the pressure relief valve says 175 PSI, I only saw one part number on the Tyco site. The pressure valve did not look adjustable. Douglas Hicks General Fire Equipment Co of Eastern Oregon, Inc ----- Original Message ----- From: "George Church" <[email protected]> To: <[email protected]> Sent: Friday, January 23, 2009 5:28 AM Subject: RE: pressure relief valve > You can't just "remove" them - be serious. > If pressure is over the factory setting, then a REPLACEMENT of the 300# > adjustable model is available and you crank it down to 200 PSI and end the > drip. > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) ---------------------------------------------------------------------------- ---- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.12/1911 - Release Date: 1/23/2009 7:28 AM _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
