OPERATION
The glass bulb contains a fluid which expands when ex-
posed to heat. When the rated temperature is reached,
the fluid expands sufficiently to shatter the glass bulb,
which then allows the sprinkler to activate and flow water.
TECHNICAL DATA
Approvals
UL Listed. FM Approved.
(The approvals apply only to the service conditions indi-
cated in the Design Criteria section.)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connection
3/4 inch NPT
Discharge Coefficient
K = 8.0 GPM/psi
1/2
(115,2 LPM/bar
1/2
)
Temperature Ratings
Standard Response:135°F/57°C, 155°F/68°C,
175°F/79°C, 200°F/93°C, 286°F/141°C, or 360°F/182°C
Quick Response:135°F/57°C, 155°F/68°C, 175°F/79°C,
200°F/93°C, or 286°F/141°C
Finishes
Sprinkler: Natural Brass with Zinc Plated Guards
Physical Characteristics
The Star Galaxy Easy Guard Sprinklers utilize a dezincifi-
cation resistant (DZR) bronze frame, and a 5 mm diame-
ter (standard response) or 3 mm diameter (quick re-
sponse) glass bulb. The two-piece button assembly is
brass and copper. The gasketed spring plate consists of a
beryllium nickel disc spring that is sealed on both its in-
side and outside edges with a Teflon
gasket. The com-
pression screw is bronze, and the deflector is brass.
DESIGN CRITERIA
The Star Galaxy Easy Guard Sprinklers are intended for
fire protection systems designed in accordance with the
standard installation rules recognized by the applicable
Listing or Approval agency (e.g., UL Listing is based on
NFPA 13 requirements).
INSTALLATION
The Star Galaxy Easy Guard Sprinklers must be installed
in accordance with the following instructions:
NOTES
Do not install any bulb type sprinkler if the bulb is
cracked or there is a loss of liquid from the bulb. With the
sprinkler held horizontally, a small air bubble should be
present. The diameter of the air bubble is approximately
1/16 inch (1,6 mm) for the 135°F/57°C to 3/32 inch
(2,4 mm) for the 360°F/182°C temperature ratings.
A leak tight 3/4 inch NPT sprinkler joint should be ob-
tained with a torque of 10 to 20 ft.lbs. (13,4 to 20,4 Nm).
A maximum of 30 ft. lbs. (40,7 Nm) of torque may be
used to install sprinklers with 3/4 NPT connections.
Higher levels of torque may distort the sprinkler inlet with
consequent leakage or impairment of the sprinkler.
Step 1.
With pipe thread sealant applied to the pipe
threads, hand tighten the sprinkler into the sprinkler fitting.
Step 2.
Tighten the sprinkler into the sprinkler fitting us-
ing only the W-Type 9 Sprinkler Wrench (Ref. Figure 1).
The W-Type 9 Sprinkler Wrench is to be applied to the
sprinkler wrenching area (groove),which is located adja-
cent to the groove where the guard is mounted to the
sprinkler.
STAR SPRINKLER
Page 2
1-4.2.12
FIGURE 1
W-TYPE 9 (#1849) SPRINKLER WRENCH
WRENCH
RECESS
OBSOLETE
