We have done this a couple times and have always replaced the compressor. However, a word of warning inspired by learning the hard way. Assuming this is a grooved system, when you drop the pressure the entire thing can start leaking like a sieve. Older couplings can be a little brittle and less resilient. They just don't like to seal correctly under the lower pressure.
Best of luck! Lori Kitchen Whitewater Fire Sprinkler -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tom Duross Sent: Thursday, July 09, 2009 7:20 AM To: [email protected] Subject: Dry System Air Question Good morning Campers, I have a dry pipe valve to replace and the client has expressed interest in a low differential replacement. The system is 25 years old and has a slow leak "somewhere" that we've not been able to locate, even after flooding. The air compressor is just a riser mount and with this new valve, air pressure will drop from 45 to +/-20, 110 PSI water. The pressure switch on the compressor has labels stating not to adjust it and leave it factory set, 35-45 PSI. I don't think I can put a regulating assembly on a riser mount, saw one once and it telegraphed badly between the compressor and regulator. I could change the pressure switch to a lower rated line switch. I could also install a regulating assembly with switch and re-wire the compressor to the new switch. What would you guys suggest? Tom Duross _______________________________________________ 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)
