Product
Description
Technical
Data
Model: ESLO-20 GB
Style: Upright
Wrench: ELO/ESLO/ESFR Combination
Part #1073
Orifice Size: 0.70"
(17.8 mm)
(VELO)
K-Factor: 14.5
(207.35 metric)
Thread Size: 3/4" N.P.T.
(20 mm)
Temperature Rating: 155
°
F/68
°
C
200
°
F/93
°
C
250
°
F/121
°
C
Installation Limitations:
• Unobstructed or non-combustible
obstructed construction consisting of
solid steel or concrete beams*.
• Minimum hydraulic design area of 5
heads or 1500 sq. ft.
(139.5 m
2
)
,
whichever is greater.
• Minimum spacing between upright
sprinklers is 14'
(4.3 m)
.
Approvals: U.L., F.M. M.E.A.
Maximum Working Pressure: 175 psi
(12.1 bar)
Factory Hydro Test: 100% at 500 psi
(34.5 bar)
Standard Finishes:
Sprinkler: brass or chrome plated
Decorative Finishes:
White or Black Painted
Corrosion Resistant Coatings:
White or Black Painted
(U.L. only)
Coatings: wax, lead, wax-over-lead
(FM only)
Escutcheon: brass, chrome plated, white
or black painted
Length: 3 1/8"
(7.94 cm)
Width:
1 3/4"
(4.44 cm)
Weight: 4.8 oz.
(136 grams)
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale, Pennsylvania 19446
1-98
The Central Model ESLO-20 GB Very
Extra Large Orifice Upright Automatic Glass
Bulb Sprinkler is specifically designed for
Extended Coverage/Ordinary Hazard for all
Groups as defined by NFPA 13. The ESLO-
20 GB is acceptable for installations in
unobstructed and non-combustible
obstructed construction consisting of
solid steel or concrete beams*. The
ESLO-20 GB is Listed for an 18"(457.2 mm)
commodity clearance from the deflector, as
standard sprinklers are per NFPA 13.
They are intended for use, as all extended
coverage sprinklers are, with hydraulically
designed systems and using the flows and
pressures as shown in this brochure. All
spacing is rounded up to the next higher
category. For example. 17'-6" x 15'-0" (5.3 x
4.6 m)
spacing would be calculated at the
Listed 18' x 18'(5.5 x 5.5 m) flow and
pressure.
The advantage of the ESLO-20 is its
ability to cover large areas, up to 400 square
feet (37.2 m
2
)
, with pressures that compare
to
1
⁄
2
"(15 mm) standard sprinklers spaced at
their maximum of 130 square feet (12.1 m
2
)
.
For example, the ESLO-20 can cover 18' x
18'(5.5 x 5.5 m) spacing or 324 square
feet(30.1 m
2
)
with less pressure than is
required with
1
⁄
2
"(15 mm) sprinklers at 130
square feet(12.1 m
2
)
. (20.0 vs. 21.3
(1.4 bar
vs. 1.5 bar
)
The Model ESLO-20 GB Sprinkler
incorporates a specially designed deflector
that provides a much greater area of
coverage than most commercial sprinklers.
The Model ESLO-20 GB incorporates the
latest in heat-responsive glass bulb technol-
ogy. The operating mechanism consists of a
3 mm liquid-filled frangible capsule that is
only 2.0 cm(20 mm) in length.
Operation: The glass bulb capsule
operating mechanism contains a heat-
sensitive liquid that expands upon applica-
tion of heat. At the rated temperature, the
ESLO-20 GB
ESLO-20 GB
No. 2-3.0
I M
A
O
P
T
Extended Coverage Ordinary Hazard
Very Extra Large Orifice
Upright Glass Bulb Automatic Sprinkler
* WEB members of open WEB trusses must not
exceed 1"
(25.4 mm)
diameter. Maximum ceiling
slope of 2" per foot
(158 mm/m)
.
Extended
Coverage
Ordinary
Hazard
Upright
Sprinkler
frangible capsule ruptures, thereby releasing
the orifice seal. The sprinkler then dis-
charges water in a pre-designed spray
pattern to control or extinguish the fire.
OBSOLETE
