Model F4FR-NF
Non-Ferrous Quick Response
Concealed Automatic Sprinkler
for MRI Type Applications
Bulletin 002
Rev.
C
The Non-Ferrous Concealer
®
Features
1.
Completely Non-Ferrous material designed
for MRI rooms, swimming pools, and many
corrosive environments.
2.
Laboratory tested in an MRI room environ-
ment.
3.
Cup and skirt fabricated from corrosion
resistant brass.
4.
Simple sturdy cover attachment.
5.
Smooth aesthetic ceiling profile.
6.
Available in bright brass, chrome and
black plated, and white or other color
painted finishes.
7.
Ordinary temperature rating.
8.
Threaded cover plate does not require clips
or springs.
Application
The
Reliable
Model
F4FR-NF
Non-Ferrous Concealer
®
is the only sprin-
kler designed specifically for MRI rooms
and many corrosive environments. A test
setup of the sprinkler assembly was
tested in a laboratory with a magnetic field
up to 6 Tesla. The highest clinical magnet
system commercially available today is 3
Tesla. There was no recorded influence of the magnetic field
on the sprinklers. The test exposed the sprinklers to mag-
netic fields and field gradients that would far exceed a stan-
dard peripheral MRI room environment.
The Model F4FR-NF is the most versatile, non-corrosive,
quick response sprinkler available. This sprinkler provides
The Model F4FR-NF Non-Ferrous Concealer
®
is de-
signed for use where aesthetic
appearance
is important.
MRI rooms, swimming pools, and many corrosive environ-
ments are possible applications for this unique sprinkler.
The Model F4FR-NF is a quick response concealed
sprinkler intended for use in accordance with NFPA 13.
The Non-Ferrous Concealer
®
can eliminate the need for
precise cutting of drop nipples. The threaded cover plate
assembly can be adjusted without tools to fit accurately
against the ceiling. The fire protection system need not be
shut down to adjust or remove the cover plate assembly.
Product Description
The Non-Ferrous Concealer
®
for quick response appli-
cations uses a 135°F (57
°
C) 3mm diameter glass bulb in a
standard style sprinkler frame with a drop-down deflector.
This assembly is recessed into the ceiling and concealed
by a flat cover plate. The cover plate and sprinkler cup as-
semblies are attached using a strong threaded engage-
ment. This threaded engagement provides ½
²
(13mm) of
cover adjustment. The cover plate is attached to the skirt
using 135°F (57
°
C) ordinary temperature classification sol-
der. When the ceiling temperature rises, the solder holding
the cover plate fuses, thus releasing the plate and expos-
ing the sprinkler inside to ambient temperature. The sub-
sequent shattering of the sprinkler bulb opens the
waterway and causes the deflector to drop into position to
distribute the discharging water. Any secure engagement
between the cover plate and cup will assure that the
drop-down deflector is properly located below the ceiling.
The Reliable Automatic Sprinkler Co., Inc.
103 Fairview Park Drive, Elmsford, New York , 10523
Bulletin
002
Rev.
C
Listings and Approvals
1. Listed by Underwriters’ Laboratories Inc. and
UL certified for Canada (cULus).
2. NYC MEA 258-93-E
Note:
Approvals are light and ordinary hazard.
UL Listing Categories
Sprinklers, Automatic & Open
Quick Response Sprinkler
UL Guide Number
VNIV
U.S. Patent No. 4,880,063.
the best form of fire protection by offering an attractive ap-
pearance and ½” (13mm) cover adjustment for ease of in-
stallation.
The small diameter cover plate is easily and
positively attached and blends into the ceiling, concealing
the most dependable fire protection available, an auto-
matic sprinkler system.
