Viking MICROFAST M-3 Technical Data

March 7, 1996
1. PRODUCT NAME
®
VIKING Microfast Model M-3
Small Orifice Residential
Pendent Sprinkler
2. MANUFACTURER
THE VIKING CORPORATION
210 N. Industrial Park Road
Hastings, Michigan 49058 USA
Telephone: (616) 945-9501
(800) 968-9501
Fax No: (616) 945-9599
From outside U.S.A.
Telephone: +1 (616) 945-9501
Fax No: +1 (616) 945-9599
3. PRODUCT DESCRIPTION
®
The Viking Microfast Model M-3, Small
Orifice, Residential Pendent Sprinkler is
a small, high sensitivity, glass-bulb
spray sprinkler. The sprinkler is avail-
able in several finishes, with tempera-
ture ratings to meet design require-
ments. The small orifice design, with a K
Factor of 4.3, allows efficient use of
available water supplies for the hydrau-
lically designed fire protection system.
The small rugged 3 mm glass-bulb, and
special deflector, combine speed of op-
eration and areas of coverage to meet
residential sprinkler standards. During
fire conditions, the heat sensitive liquid
in the glass bulb expands, causing the
glass 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.
4. TECHNICAL DATA
See Chart for approvals.
See Chart for minimum water supply require-
ments and maximum areas of coverage.
Form No. 030895
R
TECHNICAL DATA
Glass Bulb Fluid Temperature rated to
o o
-65 F (-55 C)
Rated to 175 PSI (1 207 kPa) water working
pressure
Factory tested hydrostatically to 500 PSI
(3 448 kPa)
Spring: USA Patent No. 4,167,974
Bulb: USA Patent No. 4,796,710
Testing: USA Patent No. 4,831,870
Thread Size: 1/2" (15 mm) NPT
K Factor: 4.3 (6,2 Metric*)
*See footnote 8 on Approval Chart
SPRINKLER MATERIALS:
Frame: Brass Castings UNS-C84400
Deflector: Brass UNS-C26000
Bulb: Glass Nominal 3mm diameter
®
Seal: Teflon Tape
Spring: Nickel Alloy
Screw: Brass UNS-C36000
Pip Cap: Copper UNS-C14500
ACCESSORIES:
Refer to "Sprinkler Accessories" for approved
sprinkler wrench and other accessories.
Sprinkler Nominal Sprinkler
Temperature Temperature Rating
Classification (Fusing Point)
o
Ordinary 155 F (68
o
Intermediate 175 F (79
Sprinkler Finishes: Brass, Bright Brass, Polished Chrome, White(Paint) and Navajo White(Paint).
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.
Deflector Thread
Style Size NPT
1/2 inch
Pendent
(15mm)
AREA OF COVERAGE
Maximum Area Minimum Water Supply Requirements
7
of Coverage Single Sprinkler
12' X 12' 11 GPM @ 6.5 PSI
3.7m X 3.7m 41,6 L/Min @ 45,1 kPa
14' x 14' 13 GPM @ 9.1 PSI
4.3m x 4.3m 49,2 L/Min @ 63,0 kPa
16' x 16' 13 GPM @ 9.1 PSI
4.9m x 4.9m 49,2 L/Min @ 63,0 kPa
18' x 18' 17 GPM @ 15.6 PSI
5.5m x 5.5m 64,4 L/Min @ 107,9 kPa 53,0 L/Min @ 73,1 kPa
APPROVED TEMPERATURES
A: 155°F (68°C)
3 Base part number shown. For complete part number, see price list.
4 This chart shows the listings and approvals available at the time of printing. Other approvals are
in process. Check with manufacturer for any additional approvals.
5 Listing is for Residential occupancies with smooth, flat, horizontal ceilings.
6 ULC listing and acceptance for use by City of New York Department of Buildings are pending.
7 For areas of coverage smaller than shown, use the "minimum water supply requirement" for the
next largest area listed with sprinklers of similar K factor.
8 Metric K Factor shown is for use when pressure is measured in kPa. When pressure is measured in
BAR, multiply the metric K Factor shown by 10.0.
NOTE: Install Residential Pendent sprinklers with deflectors between 1" (3/4" for recessed) & 4" below
the ceiling.
MICROFAST
SMALL ORIFICE RESIDENTIAL
PENDENT SPRINKLER
5. AVAILABILITY AND SERVICE
Viking Sprinklers are available through
a network of Domestic, Canadian, and
International Distributors. See the Yel-
low Pages of the telephone directory
(listed under "Sprinklers Automatic
Fire") or write to The Viking Corporation,
Hastings, Michigan USA Attention:
Sales Department.
6. GUARANTEES
Viking agrees to repair or replace goods
found to be defective in material and
workmanship for a period of one year
from the date of shipment. For details of
warranty, refer to price list.
7. INSTALLATION
WARNING: Viking sprinklers are manu-
factured and tested to meet the rigid
requirements of approving agencies.
The sprinklers are designed to be in-
Ceiling Temperature at Sprinkler
Max. Ambient Max. Recommend.
1
Temp. Allowed
o o o
C) 135 F (46 C)
o o o
C) 155 F (68 C)
Nominal Overall
8
K Factor Length
4.3 US 2.25 inch
(6,2 metric) (57,2mm)
4
Two or More
10 GPM @ 5.4 PSI
37,9 L/Min @ 37,4 kPa
12.0 GPM @ 7.8 PSI
45,4 L/Min @ 53,7 kPa
12.0 GPM @ 7.8 PSI
45,4 L/Min @ 53,7 kPa
14 GPM @ 10.6 PSI
APPROVED FINISHES
1: Brass, Bright Brass, Chrome,
White (Paint),Navajo White
FOOTNOTES
Replaces Sprinkler page 139 a-b dated March 24, 1995
(Revised flows downward for "Two or More" sprinklers at
14' X 14' & 16' X 16' spacings per UL listing).
Sprinkler 139 a
®
MODEL M-3
Bulb
2
Ambient Temp. Color
o o
100 F (38 C) Red
o o
150 F (65 C) Yellow
3
Base Part Number
09371
SAMPLE
Temperature
Finish
A1X Escutcheon
5 6 6 --
UL ULC NYC
A1X -- -- --
A1X -- -- --
A1X -- -- --
A1X -- -- --
APPROVED ESCUTCHEONS
X: Standard (surface) or
E-1 Recessed