I just did three this way. I figured the check was to trap the pressure in. Like George said, they want no retard.
John John August Denhardt, P.E., FSFPE Strickland Fire Protection Incorporated 5113 Berwyn Road College Park, Maryland 20740 Office Telephone Number: 301-474-1136 Mobile Telephone Number: 301-343-1457 FIRE SPRINKLERS SAVE LIVES - Can you live without them? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of George Church Sent: Thursday, April 07, 2011 11:56 AM To: [email protected] Subject: RE: elevator related sprinklers And I believe that WFS has no retard, so trapping the high pressure surges into this piping minimizes potential for false trips. George Church Rowe Sprinkler Systems, Inc. PO Box 407, Middleburg, PA 17842 877-324-ROWE 570-837-6335 fax [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, April 07, 2011 11:51 AM To: [email protected] Subject: RE: elevator related sprinklers If the systems were drained the switches would trip when the system was refilled. The arrangement is a control valve (V), check va.(V), flow switch (F) then tee to a test line with a valve (X) on the test line, straight through the tee goes to the sprinkler. __X_______ ____X__V__F___|_________ Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Hinson, Ryan Sent: Thursday, April 07, 2011 11:44 AM To: '[email protected]' Subject: RE: elevator related sprinklers Could be to prevent the elevator machine room or elevator shaft flow switches from tripping if the system feeding these heads are drained. Ryan Hinson Burns & McDonnell Direct: 952-656-6003 Ext 3662 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, April 07, 2011 9:20 AM To: [email protected] Subject: elevator related sprinklers UFC 3-600 shows a check valve in the line serving a sprinkler in an elevator machine room or hoistway. Just wondering if anyone can state what the purpose of the check is in that line. Looking at Figures 6-8 through 6-9. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] _______________________________________________ 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) _______________________________________________ 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) _______________________________________________ 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)
