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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.
Model F4FR Sprinkler Summary
K-Factor gpm/psi
Sprinkler
Model
(lpm/bar
F4FR
5.6 (80)
*Note: Listed for use in Light and Ordinary hazard occupancies only.
1/2
Orientation
)
1/2
Concealed Pendent
www.reliablesprinkler.com
Model F4FR-NF Non-Ferrous Quick Response
Concealed Automatic Sprinkler
Max. Working Pressure
Listings & Approvals
cULus*
Bulletin 002 September 2020
cULus Listed
Model F4FR-NF
Sprinkler
Identification
psi (bar)
Number (SIN)
175 (12.1)
RA0212
Table A
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Related Manuals for Reliable F4FR-NF
Summary of Contents for Reliable F4FR-NF
- Page 1 • 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.
- Page 2 Model F4FR Concealed Sprinkler SIN RA0212 Technical Specifications Sprinkler Finishes Style: Concealed Pendent Brass (Unfinished) Threads: 1/2” NPT or ISO 7-R1/2 Nominal K-Factor: 5.6 (80 metric) Sensitivity Max. Working Pressure: 175 psi (12.1 bar) Quick-Response Min. Spacing: 6 ft (1.8 m) Sprinkler Temperature Ratings Material Specifications 135°F (57°C)
- Page 3 A stock of spare sprinklers should be maintained to allow quick replacement of damaged or Model F4FR-NF sprinklers are intended to be installed operated sprinklers. Failure to properly maintain sprinklers in accordance with NFPA 13, FM Global Property Loss...
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