APRIL 2019
GFS-350
PAGE 1 of 4
SERIES GL-RES/DC
RESIDENTIAL ADJUSTABLE
DOME CONCEALED PENDENT
K-FACTOR 4.1, 4.9
TECHNICAL DATA
Approvals
•
cULus - EU
Temperature Rating
•
Sprinkler: 155°F (68°C)
•
Cover Plate: 135°F (57°C)
K-Factor
•
GL4147 K4.1 gpm/psi½
(
59.0 lpm/bar½
)
•
GL4947 K4.9 gpm/psi½
(
70.6 lpm/bar½
)
Cover Plate Finishes
•
Chrome/White Painted/Black Painted/Custom
(For Custom Plates, contact Customer Service)
Caution: Cover Plates must have factory applied finishes.
Never paint/coat plates in field.
Thread Size
•
1/2” NPT (15mm)
Length
•
2-7/32” (5.6cm)
Maximum Working Pressure
•
175 psi (12 bar)
Materials of Construction
•
Frame - bronze
•
Deflector - brass
•
Screw - brass
•
Lodgement Wire - stainless steel
•
Bulb seat - copper
•
Spring - nickel alloy
•
Seal - teflon
•
Bulb (3mm) - glass
•
Cover Plate - brass
•
Upper Escutcheon Assy. - carbon-
steel
4077 Airpark Dr. Standish, MI 48658 • 989-846-4583 •
www.globesprinkler.com
Technical Support
•
989-414-2600
•
NOTE
:
Users should refer to Globe’s web site (www.globesprinkler.com)
to assure that the most recent technical literature is being utilized.
GENERAL DESCRIPTION
The GL-RES/DC Domed Concealed pendent sprinkler is
a decorative fast response glass bulb sprinkler specifically
tested and Listed for use in residential applications such
as homes, apartments, hotels, and dormitories to provide
control of these residential type fires and to improve the
chance for occupants to escape. These sprinklers utilize
a 3mm frangible glass bulb as its heat sensing operating
element. The GL-RES/DC is available with a K-Factor of 4.1
(GL4147) and a K-Factor of 4.9 (GL4947) and offer a further
level of aesthetic appeal compared to semi-recessed type
sprinklers.
These sprinklers provide a total vertical adjustment of a
nominal 1/2”. This sprinkler may be installed within dwelling
occupancies as allowed by NFPA 13, 13D, 13R and any
other related documents as appropriate.
OPERATION
The soldered cover plate drops off the retainer assembly
when exposed to heat, as from a fire, that has reached
the plate’s Listed temperature rating, exposing the sprin-
kler above. As heat encompasses the glass bulb operating
element of the sprinkler, the fluid in the bulb expands, com
-
pressing the air bubble within the bulb. When the air bubble
can no longer compress, the fluid expansion causes break
-
age of the glass bulb, resulting in release of the water seat
assembly and discharge of water from the sprinkler.
SERIES GL-RES/DC
GL4147, GL4947
