Although late, I couldn't pass up the opportunity to elaborate on the HAD's. Some of them were combination rate of rise and fixed temperature. Air in the tubing was under a bit of pressure. Rate of rise from the increase caused by air expansion, and fixed temp because of a little hollow screw-like thingie, with the hollow filled with a fusible alloy. The one I have was made by Automatic. [EMAIL PROTECTED] Ed Vining, long since retired, guest. 4819 John Muir Rd Martinez CA 94553 925-228-8792
----- Original Message ---- From: Roland Huggins <[EMAIL PROTECTED]> To: [email protected] Sent: Thursday, March 29, 2007 12:35:29 PM Subject: Re: heat activated devices for a deluge system. the pilot lines operate from a drop in pressure. There are old pneumatic HADs that operate off a rise in air pressure. If believe these HAD's tied directly into the deluge system buts it's been about 12 yrs since I messed with them. The same plant had electric HAD's operating on 220vdc and fire pumps at 4,400 vac. Manufactured by Tool man Tim Roland _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
