Craig, I agree with what the others are saying about the check valve being installed to reduce the chance of a false signal. A California elevator expert told me a few years ago that using the water flow switch to activate the elevator power shunt trip is not recommended due to possible false trips regardless of whether or not a check valve is installed. Instead they prefer to use lower temperature heat detectors to actuate the shunt trip.
Jim From: <[email protected]> To: <[email protected]> Date: 04/07/2011 10:56 AM Subject: elevator related sprinklers Sent by: [email protected] 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) ------------------------------------------------------------ The information transmitted is intended only for the person or entity to which it is addressed and may contain proprietary, business-confidential and/or privileged material. If you are not the intended recipient of this message you are hereby notified that any use, review, retransmission, dissemination, distribution, reproduction or any action taken in reliance upon this message is prohibited. If you received this in error, please contact the sender and delete the material from any computer. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of the company. ------------------------------------------------------------ _______________________________________________ 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)
