Model F4FR-NF
Model F4FR Sprinkler Summary
Sprinkler
Model
K-Factor gpm/psi
1/2
(lpm/bar
1/2
)
Orientation
Listings & Approvals
Max. Working Pressure
psi (bar)
Sprinkler
Identification
Number (SIN)
F4FR
5.6 (80)
Concealed Pendent
cULus*
175 (12.1)
RA0212
Table A
*Note:
Listed for use in Light and Ordinary hazard occupancies only.
Features
•
Non-Ferrous design specifically tested in an MRI environment
•
Cup and skirt fabricated from brass
•
Simple sturdy cover attachment
•
Smooth aesthetic ceiling profile
•
Cover plate is available in a variety of finishes
•
Ordinary temperature rating
•
Threaded cover plate does not require clips or springs
Product Description
The Model F4FR-NF Non-Ferrous Concealer™ is a quick-
response standard coverage sprinkler that uses either a
135°F (57°C) or a 155°F (68°C) 3mm diameter glass bulb in
a concealed sprinkler frame with a drop-down deflector. This
assembly is recessed into the ceiling and finished with a flat
cover plate. The push-on/thread off cover plate provides ½”
(13mm) of cover adjustment.
The cover plate is attached to the skirt using 135°F (57°C)
ordinary temperature classification solder. When the ceiling
temperature rises, the solder holding the cover plate fuses,
releasing the plate and exposing the sprinkler.
As the temperature increases, the fluid within the glass bulb
expands. Upon reaching activation temperature, the glass
bulb shatters and opens the waterway causing the deflector to
drop into position to properly distribute the water.
The Reliable Model F4FR-NF Non-Ferrous Concealer™
is designed specifically for MRI rooms. The sprinkler
assembly was tested in a laboratory with a magnetic field of
6 Tesla. The test exposed the sprinklers to magnetic fields
and field gradients that exceed a standard peripheral MRI
room environment. There was no recorded influence of the
magnetic field on the sprinklers.
www.reliablesprinkler.com
cULus Listed
Model F4FR-NF Non-Ferrous Quick Response
Concealed Automatic Sprinkler
Bulletin 002 September 2020
