Viking MICROFAST M-4 Technical Data

June 4, 1998
1. PRODUCT NAME
®
VIKING Microfast Model M-4
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 the U.S.A.:
Telephone: +1 (616) 945-9501
Fax No: +1 (616) 945-9599
e-mail: techsvcs@vikingcorp.com
3. PRODUCT DESCRIPTION
The Viking Microfast ® Model M-4 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 sprinkler is listed for use
below smooth, flat, horizontal ceilings
and ceilings with slopes up to and in-
cluding a 6/12 pitch. (26.
6°) T
orifice design, with a K Factor of 4.3,
allows efficient use of available water
supplies for the hydraulically designed
fire-protection system. The small, rug-
ged, 3mm glass-bulb and special deflec-
tor combine speed of operation and ar-
eas of coverage to meet residential
sprinkler standards. During fire condi-
tions, the heat-sensitive liquid in the
glass bulb expands, causing the glass to
shatter, releasing the pip cap and seal-
ing spring assembly. The water flowing
through the sprinkler orifice strikes the
sprinkler deflector, forming a uniform
spray pattern to extinguish or control the
fire.
Form No. F_082095
TECHNICAL DATA
4. TECHNICAL DATA
See chart for approvals.
See chart for minimum water supply re-
quirements and maximum areas of
coverage.
Glass-bulb fluid temperature rated to
-
65°F (-55°C).
Rated to 175 PSI (1 207 kPa) water
working pressure.
Sprinkler Nominal Sprinkler
Temperature Temperature Rating
Classification (Fusing Point)
Ordinary
Intermediate
Sprinkler Finishes: Brass, Bright Brass, Chrome-Enloy
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)
Maximum Areas
9
of Coverage
12' X 12'
3.7m X 3.7m
14' x 14'
4.3m x 4.3m
16' x 16'
4.9m x 4.9m
18' x 18'
5.5m x 5.5m
20' x 20'
6.1m x 6.1m
Maximum Area
9,10
of Coverage
16' X 16'
he small
4.9m X 4.9m
APPROVED
TEMPERATURES
A: 155° F (68°C)
and 175° F (79° 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 the manufacturer for any additional approvals.
5
Listing is for residential occupancies with smooth, flat, horizontal ceilings.
6
Listing is for residential occupancies with smooth ceilings with slopes up to and including a 6/12
(26.6°) pitch.
7
Listed by Underwriter's Laboratories, Inc. for use in Canada.
8
Acceptance for use by City of New York Department of Buildings is pending.
9
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.
10
Areas under sloped ceilings must be measured along the ceiling slope. Actual floor coverage under
sloped ceilings will be less than the listed Area of Coverage.
11
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.
12
The Model F-1 Adjustable Escutcheon is considered a surface-mounted escutcheon because it does
not allow the fusible element of the sprinkler to be recessed behind the face of the wall or ceiling.
NOTE: Install residential pendent sprinklers with deflectors between 1" (3/4" for recessed) & 4" below
the ceiling.
MICROFAST
SMALL ORIFICE RESIDENTIAL
Factory tested hydrostatically to 500 PSI
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*)
SPRINKLER MATERIALS:
Frame - Brass Castings UNS-C84400
Ceiling Temperature at Sprinkler
Max. Ambient
Temp. Allowed
155°F (68°C) 135°F (46°C)
175°F (79°C) 155°F (68°C)
White(Paint)
Nominal Overall
11
K Factor Length
4.3 US 2.25 inch
(6,2 metric) (57,2mm)
AREAS OF COVERAGE
Minimum Water Supply Requirements
Single Sprinkler Two or More
11.5 GPM @ 7.2 PSI 11.5 GPM @ 7.2 PSI
43,5 L/Min @ 49,3 kPa 43,5 L/Min @ 49,3 kPa
13 GPM @ 9.1 PSI 11.5 GPM @ 7.2 PSI
49,2 L/Min @ 63,0 kPa 43,5 L/Min @ 49,3 kPa
13 GPM @ 9.1 PSI 11.5 GPM @ 7.2 PSI
49,2 L/Min @ 63,0 kPa 43,5 L/Min @ 49,3 kPa
16 GPM @ 13.8 PSI 13.5 GPM @ 9.9 PSI
60,6 L/Min @ 95,6 kPa 51,1 L/Min @ 68,0 kPa
19 GPM @ 19.5 PSI 17 GPM @ 15.6 PSI
71,9 L/Min @ 134,6 kPa 64,4 L/Min @ 107,8 kPa
Sloped Ceiling Approvals
Minimum Water Supply Requirements
Single Sprinkler Two or More
18 GPM @ 17.5 PSI 13 GPM @ 9.1 PSI
68,1 L/Min @ 120,7 kPa 49,2 L/Min @ 63,0 kPa
APPROVED FINISHES
1: Brass, Bright Brass, Chrome-
®
Enloy , White (Paint), and
Navajo White
Replaces sprinkler page 140 a-c, dated August 25, 1997
(updated approved finish and escutcheon lists).
Sprinkler 140 a
® MODEL M-4
PENDENT SPRINKLER
(3 448 kPa).
*See Footnote 8 on approval chart.
Bulb
Max. Recommended
Color
1 2
Ambient Temp.
100°F (38°C) Red
150°F (65°C) Yellow
® (patents pending), White(Paint), and Navajo
Base Part Number
09530
SAMPLE
Temperature
4
Finish
A1X Escutcheon
5 7
UL ULC
A1X A1X
A1X A1X
A1X A1X
A1X A1X
A1X A1X
10
5 7
UL ULC
A1X A1X
APPROVED ESCUTCHEONS
X: Standard surface or F-1 Adjustable
Escutcheon, or recessed with
E-1 Recessed Escutcheon
3
8
NYC
--
--
--
--
--
8
NYC
--