
Design Criteria
ULandC-ULListing
Requirements
The 16.8 K-factor, Model K17-231
(TY7151 & TY7251) Sprinklers may be
installed in accordance with NFPA 13
standard sprinkler position and
area/density flow calculation require-
ments for light, ordinary, or extra haz-
ard occupancies with a minimum re-
sidual (flowing) pressure of 7 psi (0,5
bar) in wet or dry pipe sprinkler sys-
tems, or they may be installed in ac-
cordance with NFPA 13 standard
sprinkler position and area/density
flow calculation requirements for high
piled storage occupancies (solid piled,
palletized, rack storage, bin box, and
shelf storage including but not limited
to Class I-IV and Group A plastics) with
a minimum residual (flowing) pressure
of 7 psi (0,5 bar) for wet or dry pipe
systems.
The following two examples are typical
of the types of arrangements permitted
by NFPA 13. For all combinations of
lesser and greater building heights,
lesser and greater storage heights,
storage arrangements, commodity
classifications, and lesser or greater
required design densities, refer to
NFPA 13 for specifics.
Example 1: NFPA 13 provides ceiling
only protection (i.e., no in-rack sprin-
klers) criteria using open frame (i.e. no
solid shelves) single, double, multiple-
row, or portable rack storage (without
the need for in-rack sprinkler protec-
tion) of cartoned or uncartoned unex-
panded Group A or B plastics, or, car-
toned 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 deflector to top of stor-
age clearance of 18 inches (457
mm);
•
a minimum design density of 0.60
gpm/ft2(24,4 mm/min);
•
a minimum residual (flowing) pres-
sure 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 (i.e., no in-rack sprin-
klers) criteria using open frame (i.e. no
solid shelves) single, double, multiple-
row, or portable rack storage (without
the need for in-rack sprinkler protec-
tion) of cartoned or uncartoned unex-
panded Group A or B plastics, or, car-
toned 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 deflector to top of stor-
age clearance of 18 inches (457
mm);
•
a minimum design density of 0.80
gpm/ft2(32,6 mm/min);
•
a minimum residual (flowing) pres-
sure 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 16.8 K-factor, Model K17-231
(TY7151) Upright Sprinklers may be
installed in accordance with the appli-
cable “control mode density/area”
guidelines provided by Factory Mutual.
(FM guidelines may differ from UL and
C-UL Listing criteria.)
Operation
The glass bulb contains a fluid that
expands when exposed to heat. When
the rated temperature is reached, the
fluid expands sufficiently to shatter the
glass bulb, allowing the sprinkler to
activate and flow water.
Page2of4 TFP332
TYPE TEMP. BULB
LIQUID
NATURAL
BRASS
286°F/141°C
PENDENT
K=16.8 (TY7251)
SPRINKLER FINISH
1, 2, 4
Red
Green
Blue
155°F/68°C
200°F/93°C
NOTES:
1. Listed by Underwriters Laboratories, Inc. (UL Listed).
2. Listed by 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)
155°F/68°C Red
200°F/93°C Green
286°F/141°C Blue
1, 2, 3, 4UPRIGHT
K=16.8 (TY7151)