In addition to Mr. Izzo's comment I would add that it goes without saying this valve should be supervised whether supervision is required by code or not. So, supervision and IT&M would be additional costs.
Scott C: (612) 759-5556 W: (763) 425-1001 -----Original Message----- From: "Sal Izzo (TECH- 103)" <[EMAIL PROTECTED]> To: "[email protected]" <[email protected]>; "[email protected]" <[email protected]> Sent: 2/13/08 8:55 AM Subject: RE: Preaction trip test Have seen this set-up for the protection of freezers. With this arrangement, it is a good idea that prior to the downstream control valve, you tee off to piping for an adequately sized drain with associated control valve. Open this drain prior to tripping the deluge valve to ensure that you do not cause a water hammer in the system when the deluge valve is tripped. This will cause the loss of air pressure in the piping first, prior to operating the detection system to actuate the deluge valve. Regards, Salvatore Izzo, P.E. SFPE Manager - Reliable Technical Services ________________________________ From: [EMAIL PROTECTED] on behalf of Ray Schmid Sent: Wed 2/13/2008 9:05 To: [email protected] Subject: Preaction trip test Forum, I have a client that would like to install an isolation control valve several feet downstream of a preaction valve. The system is double interlock. The purpose of the valve would be to permit a full flow trip test, per 25, without flooding the system piping. The system protects a Tier III data center and they are not going to allow flooding of the piping if there are other options available. How common is this arrangement? Any pitfalls? Thanks Ray Schmid, P.E. President Schmid & Associates, PC Fire Protection Engineers 443-465-4206 [EMAIL PROTECTED] This communication is confidential. This information may be privileged and is intended for the exclusive use of the above named addressee(s). If you are not the intended recipient(s), you are expressly prohibited from copying, distributing, disseminating, or in any other way using any of this information contained herein. If you have received this communication in error, please contact the sender by telephone at (443) 465-4206 or respond via e-mail and then permanently delete the original email and any copies. _______________________________________________ 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) _______________________________________________ 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) _______________________________________________ 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)
