Viking M Technical Data

February 15, 1996

1. PRODUCT NAME

Viking Model M
Extra Large Orifice Sprinkler

2. MANUFACTURER

THE VIKING CORPORATION
210 N. Industrial Park Road
Hastings, Michigan 49058 U.S.A.
Telephone: (616) 945-9501
(800) 968-9501
Fax Number: (616) 945-9599
From outside U.S.A.
Telephone: +1 (616) 945-9501
Fax Number: +1 (616) 945-9599

3. PRODUCT DESCRIPTION

The Viking Model M Extra Large Orifice
Sprinkler is a thermo-sensitive glass-
bulb spray sprinkler. A rugged 5mm
glass-bulb, an extra large orifice, and the
familiar Model M design, are combined
in the standard response Model M Extra
Large Orifice Sprinkler.
The extra large orifice provides greater
flows at lower pressures than those pro-
duced by standard orifice or large orifice
sprinklers. This feature allows reduced
pipe sizing for hydraulically calculated
sprinkler systems which require high
densities of water. The Model M Extra
Large Orifice Sprinkler may eliminate
the need for a fire pump or reduce the
size of the pump if it is required. On
existing systems, replacing large orifice
sprinklers with extra large orifice sprin-
klers may provide the higher densities
required to allow an increase in the haz-
ard classification of an occupancy .
Viking Model M Extra Large Orifice
Sprinklers are available in both upright
and pendent styles with finishes and
temperature ratings to meet design re-
quirements. The special Teflon
polyester coatings can be used in deco-
rative applications where colors are de-
sired. In addition, these two finishes are
corrosion resistant and provide protec-
tion against many corrosive environ-
ments.
During fire conditions, the heat sensitive
liquid in the glass-bulb expands, causing
the bulb to shatter, releasing the pip cap
and sealing spring assembly. The water
flowing through the sprinkler orifice
strikes the sprinkler deflector forming a
uniform spray pattern to extinguish or
control the fire.
Viking Model M Extra Large Orifice
Sprinklers may be ordered and/or used
as open sprinklers (glass-bulb and pip
cap assembly removed) on deluge sys-
tems.
Note: Units of measure in parentheses may be approximations.
Form No. 010692
R
TECHNICAL DATA
The Viking Model M Extra
Large Orifice Upright Sprinkler
is
UL listed and FM Approved
for use in High Piled Storage
Occupancies.
See Approval Chart and Figure A.
When acceptable to the
Authority Having Jurisdiction,
Viking Model M Extra Large Orifice
Upright sprinklers may be used to
protect single, double, multiple-row,
and portable rack storage of Class
I-IV group A and B plastics, cartoned,
expanded or unexpanded, as well as
exposed unexpanded with:
a maximum storage height of
20 ft. (6,1 m),
a maximum ceiling height of
25 ft. (7,6 m),
36 inches (914,4 mm) minimum
deflector to top of storage
clearance,
design density of 0.60 gpm/sq. ft.
(24,5 l/min/sq. meter), and a
design area of
2000 sq. ft. (186 sq. meters)
for wet systems or
2600 sq. ft. (242 sq. meters),
for dry systems.
Sprinkler Nominal Sprinkler
®
and
Temperature Temperature Rating
Classification
Ordinary
Ordinary
Intermediate
Intermediate
High
Sprinkler Finishes: Brass, Polished Chrome, Black Teflon
Corrosion Resistant Coatings
Wax coated brass in the following temperatures:
o o
135 F(57 C) White Wax
o o
155 F(68 C) Light Brown Wax
1
Based on National Fire Prevention and Control Administration Contract No. 7-34860.
2
Based on NFPA-13. Other limits may apply depending on fire loading, sprinkler location and other
authority having jurisdiction requirements. Refer to specific installation standards.
3
Temperature rating is stamped on deflector.
4
The Corrosion Resistant Coatings have passed the standard corrosion test required by the listed
approving agencies. These tests cannot and do not represent all possible corrosive environments. Prior
to installing, verify through the end user, that the coatings are compatible or suitable for the proposed
environment. The coatings indicated are applied to the exposed exterior surfaces only and therefore
cannot be used as open sprinklers. Note that the spring is exposed on the Teflon
and the White Polyester sprinkler.
Ceiling Temperature at Sprinkler
Max. Ambient
(Fusing Point) Temp. Allowed
o o o o
135 F(57 C) 115 F(46
o o o o
155 F(68 C) 135 F(57
o o o o
175 F(79 C) 155 F(68
o o o o
200 F(93 C) 180 F(82
o o o
286 F(141 C) 266 F(130
®
4
: Black Teflon and White Polyester in all temperatures and
o
175 F(79
o
200 F(93
Replaces Sprinkler page 13 e, f, & g dated April 1, 1994
(Added FM Approved upright ELO.)
Sprinkler 13 e
MODEL M
EXTRA LARGE ORIFICE
SPRINKLER
Upright

4. TECHNICAL DATA

See Chart (page 13 g) for list of approvals.
Glass Bulb Fluid Temperature rated to
o o
-65 F (-55 C)
Rated 175 PSI (1 207 kPa) water work-
ing pressure
Factory tested hydrostatically to 500 PSI
(3 448 kPa)
Thread size: 3/4 NPT (20mm)
Orifice Size: Nominal 5/8" (16mm)
K Factor: 11.5 (16,6 Metric for use when
pressure is measured in kPa)
Spring: USA Patent No. 4,167,974
Bulb: USA Patent No. 4,796,710
Spacing requirements: Refer to Ap-
proval Chart and Figure A
Minimum operating pressure require-
ments: Refer to to Approval Chart
and Figure A
Materials:
Frame: Brass castings UNS-C84400
Deflector: Brass UNS-C26000
Bulb: Glass; Nominal 5mm diameter
®
Seal: Teflon Tape
Spring: Nickel Alloy
Max. Recommend.
1 2
Ambient Temp.
o o
C) 100 F(38 C)
o o
C) 100 F(38 C)
o o
C) 150 F(65 C)
o o
C) 150 F(65 C)
o o o
C) 225 F(107 C)
®
and White Polyester.
o
C) Dark Brown Wax
o
C) Dark Brown Wax.
®
coated sprinkler
Pendent
Bulb
3
Color
Orange
Red
Yellow
Green
Blue