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Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com
For systems designed to NFPA 13D or NFPA 13R. For systems designed to NFPA 13, refer to the design criteria.
Sprinkler Base
SIN
Part Number
1
25639
VK495
Maximum
Coverage Area
Flow
5
W X L
gpm
Ft. X Ft.
(Lpm)
(m X m)
12 X 12
10
(3.7 X 3.7)
(37.6)
14 X 14
10
(4.3 X 4.3)
(37.6)
15 X 15
12
(4.6 X 4.6)
(45.4)
16 X 16
13
(4.9 X 4.9)
(49.2)
18 X 18
17
(5.5 X 5.5)
(64.4)
Part number shown is the base part number. For complete part number, refer to current our price list.
1.
Metric K-factor measurement shown is when pressure is measured in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
2.
This chart shows the listings and approvals available at the time of printing. Other approvals may be in process. Check with the manufacturer for any additional approvals.
3.
Refer also to Design Criteria.
Listed by Underwriter's Laboratories, Inc. for use in the U.S. and Canada.
4.
For areas of coverage smaller than shown, use the "Flow" and "Pressure" for the next larger area listed. Flows and pressures listed are per sprinkler. The distance from
5.
sprinklers to walls shall not exceed one-half the sprinkler spacing indicated for the minimum "Flow" and "Pressure" used.
Other paint colors are available on request with the same listings as the standard finish colors. Listings and approvals apply for any paint manufacturer. Contact Viking
6.
for additional information. Custom colors are indicated on a label inside the cover assembly. Refer to Figure 3.
Accepted Cover Plate Finishes are: Polished Chrome, Brushed Chrome, Bright Brass, Antique Brass, Brushed Brass, Brushed Copper, Painted White, Painted Ivory, or
7.
Painted Black
.
6
Sprinklers with the Electroless Nickel PTFE (ENT) finish are cULus Listed as corrosion resistant.
8.
The 18' X 18' (5.5 m X 5.5 m) coverage area is cULus listed for use with 155 °F (68 °C) rated sprinklers only.
9.
Form No. F_041623
Rev 02
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
APPROVAL CHART
VK495, 3.7 K-Factor Residential Concealed Pendent Sprinkler
For Ceiling types refer to current editions of NFPA 13, 13R or 13D
Thread Size
Inches
mm
1/2
15
Pressure
Deflector to
PSI (bar)
Ceiling
7.3
(0.5)
7.3
(0.5)
10.5
Refer to
(0.7)
Figure 2
12.3
(0.8)
21.1
(1.5)
August 2023
Nominal K-Factor
U.S.
metric
2
3.7
53.3
Listings
and
Installation
Approvals
3
Type
cULus
4
Concealed
See
with Cover
Footnotes
Plate
3, 4, and 8
Assembly.
See
Footnotes 6
& 7.
See
Footnotes
3, 4, and 9.
Footnotes
FREEDOM
RESIDENTIAL
®
CONCEALED PENDENT
SPRINKLER VK495 (K3.7)
Maximum Water Working Pressure
175 psi (12 bar)
Minimum Spacing
Ft.
(m)
8
(2.4)
Page 4 of 7
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