
TFP332
Page 2 of 4
Design
Criteria
UL and C-UL Listing Requirements
The TYCO 16.8 K-factor, Model K17-231
(TY7151 & TY7251) Sprinklers may be
installed in accordance with NFPA 13
standard sprinkler position and area/
density ow calculation requirements
for light, ordinary, or extra hazard oc-
cupancies with a minimum residual
(owing) pressure of 7 psi (0,5 bar) in
wet or dry pipe sprinkler systems, or
they may be installed in accordance
with NFPA 13 standard sprinkler posi-
tion and area/density ow calculation
requirements for high piled storage oc-
cupancies (solid piled, palletized, rack
storage, bin box, and shelf storage in-
cluding but not limited to Class I-IV and
Group A plastics) with a minimum resid-
ual (owing) pressure of 7 psi (0,5 bar)
for wet or dry pipe systems.
The following two examples are typical
of the types of arrangements permit-
ted by NFPA 13. For all combinations
of lesser and greater building heights,
lesser and greater storage heights,
storage arrangements, commodity
classications, and lesser or greater re-
quired design densities, refer to NFPA
13 for specics.
Example 1: NFPA 13 provides ceiling
only protection (that is, no in-rack sprin-
klers) criteria using open frame (that is,
no solid shelves) single, double, multi-
ple-row, or portable rack storage (with-
out the need for in-rack sprinkler pro-
tection) of cartoned unexpanded Group
A or B plastics, or, cartoned expanded
Group A or B plastics, with:
• a storage height of up to 20 feet
(6,1 m);
• a maximum ceiling height of 27 feet
(8,2 m);
• a minimum deector to top of
storage clearance of 18 inches
(457 mm);
• a minimum design density of 0.60
gpm/ft2(24,4 mm/min);
• a minimum residual (owing)
pressure of 7 psi (0,5 bar);
• a minimum design area of 2000 ft2
(186 m2) for wet systems or 2600 ft2
(242 m2) for dry pipe systems
Example 2: NFPA 13 provides ceiling
only protection (that is, no in-rack sprin-
klers) criteria using open frame (that is,
no solid shelves) single, double, multi-
ple-row, or portable rack storage (with-
out the need for in-rack sprinkler pro-
tection) of cartoned unexpanded Group
A or B plastics, or, cartoned expanded
Group A or B plastics, with:
• a storage height of up to 25 feet
( 7, 6 m);
• a maximum ceiling height of 30 feet
(9,1 m);
• a minimum deector to top of
storage clearance of 18 inches
(457 mm);
• a minimum design density of
0.80 gpm/ft2(32,6 mm/min);
• a minimum residual (owing)
pressure of 7 psi (0,5 bar);
• a minimum design area of 2000 ft2
(186 m2) for wet systems or 4500 ft2
(418 m2) for dry pipe systems
FM Approval Requirements
The TYCO 16.8 K-factor, Model K17-231
(TY7151) Upright Sprinklers may be in-
stalled in accordance with the applica-
ble control mode density/area guide-
lines provided by Factory Mutual. (FM
guidelines may differ from UL and C-UL
Listing criteria.)
TYPE TEMPERATURE BULB
LIQUID
SPRINKLER FINISH
NATURAL BRASS
UPRIGHT
K=16.8 (TY7151)
155°F (68°C) Red
1, 2, 3, 4200°F (93°C) Green
286°F (141°C) Blue
PENDENT
K=16.8 (TY7251)
155°F (68°C) Red
1, 2, 4200°F (93°C) Green
286°F (141°C) Blue
NOTES:
(1) Listed by Underwriters Laboratories, Inc. (UL Listed).
(2) Listed by Underwriters Laboratories, Inc. for use in Canada (C-UL Listed).
(3) Approved by Factory Mutual Research Corporation (FM Approved).
(4) Approved by the City of New York under MEA 177-03-E.
TABLE A
LABORATORY LISTINGS AND APPROVALS
(Refer To The Design Criteria Section)