Same basic concept as the TYCO boot.
Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected] From: Sprinklerforum [mailto:[email protected]] On Behalf Of Allan Seidel Sent: Wednesday, October 18, 2017 9:22 AM To: [email protected] Subject: Re: Clean Room Sprinkler Options [EXTERNAL] DEKS Dektite Original #3 Silicone roofing boot model DF203RE with 8" base o.d. When the plenum is a sealed space, use the boot on the pipe where it enters the plenum and also at the sprinkler. On Wed, Oct 18, 2017 at 6:50 AM, AKS-Gmail-IMAP <[email protected]<mailto:[email protected]>> wrote: For the situation where the ceiling is a solid composite panel below a pressurized plenum there is a particular brand of flexible roof boot designed to handle pipe penetrations at a roof that will work. I do not have the name off hand. In my area it comes out of Chicago. Imagine a rubber device that is not unlike the flexible boot for a car’s stick shifter. Its end that attaches to the roof is large enough to comfortably fit over the sprinkler. The other end that you cut to size will fit a 1” pipe. You will have to call to make sure the dimensions work since none of the manufactures for this type of product post the dimensions and most are not large enough to fit over the sprinkler. The guy I called actually had one in his hands, so he could measure its business end while we talked. The product has a ring for fastening to a metal deck. Apply silicone seal there and also where the boot grips the 1” pipe. The boot will isolate the sprinkler from the pressurized plenum. Allan Seidel St. Louis, MO On Oct 17, 2017, at 2:16 PM, Larrimer, Peter A <[email protected]<mailto:[email protected]>> wrote: Can anyone please assist with a recommendation for a “clean room” sprinkler where the clean rooms are designed to be negative pressure (for compounding dangerous drugs). The concealed sprinkler cut sheets that I’ve looked at online generally say that the concealed heads cannot be used in negative pressure rooms (positive pressure plenums) and this is the type of room design that we require. The FlexHead cleanroom ceiling sprinkler connection doesn’t appear to be easy to clean after installation. What type of quick response sprinkler could be used in a negative pressure room that is readily and easily cleanable? Users wanted to used concealed sprinklers as they thought that the concealed sprinklers would be easy to wipe down when necessary, but we don’t want to violate the installation instructions on the cut sheets that state that the concealed sprinklers can’t be used with positive pressure plenums (negative pressure rooms). Thanks in advance. Pete Larrimer VA
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