2
NOTE: The ELO-231 is a standard spray sprinkler for use with the area/density curves of the NFPA standards and a specific
application sprinkler for reduced area. The following guidelines are only for reduced area applications. These guidelines do
not apply if you are not using the ELO-231 for reduced area specific application. For standard applications, see the ELO-231
data sheet not this specific application data sheet.
For projects requiring Factory Mutual Guidelines, consult the Factory Mutual Loss Prevention Data Sheets. Some of their
requirements are different.
Temperature Rating: 165
°
F, 212
°
F, and 286
°
F.
Hydraulic Design Criteria: End head flow to be determined
based on the spacing of the sprinkler, per NFPA spacing
criteria for standard spray sprinklers (see section 4-2.2.1),
multiplied by the density of .6 gpm per sq. ft. This flow is then
used in the formula: pressure = (flow/K-factor)
2
to determine
the minimum end head pressure. At least 10 psi must be
used, even if the calculated pressure is less.
Design Area: For wet systems 2000 square feet and for dry
systems use the 30% increase for a total of
2600 square feet.
Spacing: NFPA criteria for standard spray sprinklers.
Maximum spacing is 100 square feet. Minimum
spacing is 6' apart unless separated by baffles.
Obstructions: NFPA criteria for standard spray sprinklers.
Type of Storage: Single, double, multiple-row and portable rack
storage and solid piled or palletizied storage.
Commodity: Class I-IV, encapsulated or non-encapsulated.
Group A and B plastics - cartoned, expanded or
unexpanded as well as exposed, unexpanded.
Maximum Storage Height: 20'
Clearance: 36" minimum from deflector to top of storage.
Max. Ceiling Height in Area of Storage: 25'
Construction Type: All types - deflector distances per NFPA 13.
System Type: Wet or dry
Sprinkler Data: K-Factor 11.4
Orifice 0.64"
Thread Size
3
⁄
4
" or
1
⁄
2
" (upright only)
Always consult the appropriate Factory Mutual data sheets if Factory Mutual Guidelines Apply.
Figure 1
ELO-231 S. A. Upright Sprinkler
3 3/16"
ELO .64
1 3/4" Diameter
ELO-231 Specific Application Guidelines
Figure 2
ELO-231 S. A. Pendent Sprinkler
ELO .64
3 3/16"
1 1/4" Diameter
Design
Data
The Model ELO-231 Extra Large Orifice
Sprinkler is Listed for standard sprinkler
placement and standard flow and
pressure requirements as specified in
NFPA 13, 231, 231C and 231D.
The ELO-231 is not Listed for use as
a “large drop” sprinkler nor as an
“ESFR” sprinkler.
The following parameters must be
incorporated into the design of automatic
sprinkler systems utilizing Model ELO-231
Sprinklers for NFPA applications:
1. Minimum sprinkler spacing is 6
feet.
2. Maximum coverage area is 100
sq. ft.
3. Automatic sprinkler systems must
be hydraulically calculated using
the area/density curves of NFPA
Standards.
4. Minimum sprinkler discharge
pressure is 10 psi (36 gpm) for
NFPA 231, 231C and 231D
applications and 7 psi for NFPA
13 applications.
OBSOLETE
