An OS&Y is one type of indicating valve. A Post Indicating Valve (PIV) would also fall into that category. It wouldn't HAVE to specifically be an Outside Stem/Screw and Yoke valve.
The indicating portion would be signage as part of the valve showing "OPEN" or "SHUT/CLOSED" or some other means to clearly show the valve position. Not sure if that answered the question though! James M. Kettler, EFO, CFPS Director of Building and Codes/Fire Marshal Buckingham Township PO Box 413 4613 Hughesian Drive Buckingham, PA 18912 215-794-8836 www.buckinghampa.org -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Karen Purvis Sent: Thursday, January 14, 2010 3:39 PM To: [email protected] Subject: Definition Can anyone give me a definition of "indicating shut-off valve". My guess is that it is an OS & Y but don't know. Karen Purvis Senior Designer Facility Systems Consultants 713 South Central Street, Suite 101 Knoxville, TN 37902 ph.865-246-0164 fax 865-246-1084 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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 [email protected] http://fireball.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)
