TFP213
Page 2 of 4
Design
Criteria
UL and C-UL Listing Criteria
NFPA 13, Chapters 12 thru 20 –
Density / Area Design
The TYCO Model EC-25 Extended
Coverage Upright Sprinklers (TY9128)
are UL and C-UL Listed for installa-
tion in accordance with the extended
coverage upright spray sprinkler
requirements of NFPA 13 or other appli-
cable NFPA standards when used in
conjunction with the following
guidelines:
• Protection of extra hazard and high-
piled storage occupancies where
area/density design criteria are
provided.
• Unobstructed or non-combustible
obstructed construction.
• Model EC-25 Sprinklers, having
been specifically tested and Listed
for non-combustible obstructed
construction, are suitable for use
within trusses or bar joists having
non-combustible web members
greater than 1 in. (25,4 mm) when
applying the 4 times obstruction
criteria rule defined under “Obstruc-
tions to Sprinkler Discharge Pattern
Devel opment.”
• Maximum coverage area per
sprinkler is 196 ft² (18,2 m²).
• Maximum distance between sprin-
klers is 15 ft (4,6 m) when the
coverage area does not exceed
144 ft² (13,4 m²), and the maximum
distance between sprinklers is
14 ft (4,3 m) when the coverage
area does not exceed 196 ft²
(18,2 m²).
• Minimum distance between sprin-
klers is 8 ft (2,44 m).
• Minimum flow requirement is based
on the design density applied
over the actual coverage area per
sprinkler.
For example, when:
A sprinkler spacing is 14 ft × 12 ft − 6 in.
(4,3 m × 3,8 m) or 175 ft² (16,3 m²),
and the design density is 0.6 gpm/ft²
(24,4 mm/min), the sprinkler design
flow rate is 105 gpm (397 Lpm) and
the required design pressure is
17.4 psi (1,2 bar).
• The minimum clearance between
the deflector and the top of storage
is 36 in. (0,9 m). For clearances of
36 in. (0,9 m) up to 48 in. (1,21 m),
the minimum design pressure is
22 psi (1,52 bar). For clearances
of 48 in. (1,21 m) and greater, the
minimum design pressure is estab-
lished by the minimum flow require-
ment. However, the pressure can
never be less than 7 psi (0,5 bar).
• Ordinary and intermediate temper-
ature rated Model EC-25 Upright
Sprinklers have been investigated
for use in high-piled storage occu-
pancies at the hydraulic demand
normally associated with high
temperature sprinklers. As such,
the Model EC-25 Upright Sprinklers
are listed storage sprinklers having
a K-factor greater than 11.2 (161,4)
and having ordinary and interme-
diate temperature ratings of 165°F
or 74°C and 214°F or 101°C. Conse-
quently, the Model EC-25 Sprin-
klers, in accordance with NFPA 13,
may be used in conjunction with the
density curves for high temperature
sprinklers.
• NFPA obstruction rules for Extended
Coverage Sprinklers must be utilized.
System Type
Wet pipe, dry pipe, and pre-action
systems are acceptable.
FM Approval Criteria
FM Loss Prevention Data Sheets
2-0, 3-26, and 8-9
TYCO Model EC-25 Extended Cover-
age 25.2K Upright Sprinklers (TY9128)
are FM Approved to be utilized in accor-
dance with the following guidelines.
Application
The Model EC-25 Extended Cov-
erage Upright Sprinklers are
1- Frame
2- Deflector
3- Compression Screw
4- Hook
5- Strut
6- Link Assembly
7- Button
8- Gasketed Spring Plate
9- Ejection Spring
10- Deflector Nut
* ISO 7-R1 pipe thread can be
provided on special request.
Item
Description
Sprinkler Identification Number (SIN)
TY9128
K-factor (gpm/psi) (lpm/bar)
25.2 gpm/psi
½
(362,9 lpm/bar
½
)
Temperature Rating ˚F (˚C)
165˚F (74˚C)
212˚F (100˚C)
Thread Size
1 in. NPT or ISO 7-R 1
Sprinkler Orientation
Upright
Maximum Working Pressure, psi (bar)
175 psi (12,1 bar)
*
7
1
1" NPT
8
6
9
5
4
2
WRENCH
FLATS
TEMPERATURE
RATING
9/16"
(14,3 mm)
NOMINAL
MAKE-IN
3-3/4"
(95,3 mm)
3
10
2-9/16" DIA.
(65,0 mm)
FIGURE 1
MODEL EC-25 UPRIGHT SPRINKLER, 25.2K
EXTENDED COVERAGE
TABLE A
MODEL EC-25 UPRIGHT SPRINKLER
TECHNICAL DATA
