ELO-231SA
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale, Pennsylvania 19446
ELO-231
Specific Application
.6 Density/2,000 sq. ft.
No. 2-9.2
• Flexibility for spec-occupancies by allowing
palletized or rack storage of Class I through
IV commodities and Group A plastics up to
20' (see application chart on page 2). This
provides owners and tenants great
flexibility in allowable storage arrange-
ments, heights and commodities.
The low end head pressures of the 11.4
K-factor, combined with the increase of
pressure available by reduced area, results in
the ability to:
• Reduce Pipe Size
• Increase Spacing
• Eliminate Booster Pumps
• Upgrade Existing Densities
ELO-231
.64 Orifice
Automatic
Sprinkler
I M
A
O
P
T
1-97
The Central Model ELO-231 Automatic
Sprinkler is an Extra Large Orifice Sprinkler
that has been proven for storage occupancies
by full-scale fire testing at Factory Mutual and
designed to control high challenge fires in
storage occupancies with relatively low
required operating pressures. The
ELO-231 x
1
⁄
2
" is now available in a glass bulb
design, as well as the traditional center strut
design. It is available in the standard
3
⁄
4
"
thread in upright and pendent, and for retrofit
use a
1
⁄
2
" thread is available for upright only.
Through additional full-scale fire tests at
Factory Mutual, the ELO-231 has been U.L.
Listed and Factory Mutual Approved to
reduce the required remote area for Class I
through IV commodities and Group A Plastics
(see table) to 2,000 sq. ft. This represents up
to a 50% decrease in area when using
Central's ELO-231 sprinkler. Never has a
5
⁄
8
"
orifice standard spray sprinkler received such
recognition for its performance in full-scale fire
testing.
The decrease in remote area, results in a
dramatic reduction of the required water flow
demand. This, combined with the low
operating pressure requirements, results in:
• The ability to store higher when compared
to
1
⁄
2
" and
17
⁄
32
" standard spray sprinklers at
the same flow demand. This is because
standard spray sprinklers require higher
water flow demands to protect the same
height of storage.
• More water pressure is made available by
reducing the overall water demand of the
system. For example, a .6/4000 sq. ft.
demand of NFPA 231C would normally
require a minimum of 2,400 GPM. The
ELO-231 reduces this area to a .6/2,000 sq.
ft. demand or 1,200 GPM. The available
water pressure is higher at 1,200 GPM than
at 2,400 GPM. Therefore, there is higher
available pressure for use in hydraulic
calculations.
Model:
ELO-231 or ELO-231 x
1
⁄
2
"
Style:
Upright or Pendent
(pendent
not available in
1
⁄
2
" thread)
Orifice Size: 0.64"
(16.3 mm)
(E.L.O.)
K-Factor: 11.4
(163.02)
Nominal
Thread:
3
⁄
4
"
(19.1 mm)
or
1
⁄
2
"
(12.7 mm)
N.P.T.
Temperature and Color:
Glass Bulb
Center Strut
155
°
F/68
°
C - Red
165
°
F/74
°
C - Uncolored
200
°
F/93
°
C - Green
212
°
F/100
°
C - White
286
°
F/141
°
C - Blue
286
°
F/141
°
C - Blue
Approvals: U.L., U.L.C, F.M.,
*MEA (127-93-E)
(See chart on
page 3 for specific temperatures
and finishes.)
* MEA Approved for 165
°
F & 286
°
F center strut
upright only.
Minimum Operating Pressure:
*10 PSI
(68.95 kpa)
Maximum Working Pressure:
175 psi
(12.07 bar)
Factory Hydro Test: 100% at 500 psi
(34.48 bar)
Standard Finish: brass, chrome
Corrosion Resistant Coatings: See Page 3.
Length: 3
3
⁄
16
"
(8.1 cm)
Width: 1
3
⁄
4
"
(4.5 cm)
Weight: 4.8 oz.
(136 grams)
Head Guard: G-2
(U.L. Listed for Upright only
& F.M. Approved for Upright &
Pendent)
Technical
Data
* NFPA 231, 231C and 231D applications require 10
psi; 7 psi can be used for NFPA 13 applications.
Product
Description
OBSOLETE
