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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
5. OPERATION
During fire conditions, when the temperature around the sprinkler approaches its operating temperature, the cover plate detaches,
releasing the deflector. Continued heating of the exposed sprinkler causes the heat-sensitive liquid in the glass bulb to expand,
causing the glass to shatter, releasing the yoke and pip cap and sealing spring assembly. Water flowing through the sprinkler orifice
strikes the deflector, forming a uniform spray pattern over a specific area of coverage determined by the water supply pressure at
the sprinkler to extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements.
7. AVAILABILITY
Viking Sprinkler Model VK495 is available through a network of domestic and international distributors. See The Viking Corporation
web site for the closest distributor or contact The Viking Corporation.
8. GUARANTEE
For details of warranty, refer to Viking's current list price schedule or contact Viking directly.
Ordering Instructions:
(1) Select a sprinkler base part number
(2) Add the suffix for the desired finish
(3) Add the suffix for the desired sprinkler temperature rating
(4) Order a cover plate (Must be ordered separately; refer to Table 2)
Example:
25639AE = 200 °F (93 °C) Temperature rated sprinkler with a standard brass finish.
Size
Sprinkler
Base Part
NPT
Number
1
Inch
25639
1/2
Accessories
Part
Description
Number
23143
Installation wrench
14412
Small concealed cover plate installer tool; requires a piece of 1" PVC pipe or similar to attach (available since 2007).
14867
Large concealed cover plate installer tool; requires a piece of 1" PVC pipe or similar to attach (available since 2007).
01731A
Sprinkler cabinet; holds up to 6 sprinklers (available since 1971).
Footnotes
Part number shown is the base part number. For complete part number, refer to the current Viking price list schedule.
1.
Based on NFPA 13, NFPA 13R, and NFPA 13D. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having
2.
Jurisdiction. Refer to specific installation standards.
cULus listed as corrsion resistant.
3.
The corrosion resistant coatings have passed the standard corrosion test required by the approving agencies indicated in the Approval Charts. These tests cannot and
4.
do not represent all possible corrosive environments. Prior to installation, verify through the end-user that the coatings are compatible with or suitable for the proposed
environment. For automatic sprinklers, the ENT coating is applied to all exposed exterior surfaces, including the waterway. For ENT coated sprinklers, the Belleville
spring is exposed.
The sprinkler temperature rating is stamped on the deflector.
5.
The installation wrench is intended to be used for a maximum of 500 sprinkler installations at a maximum torque of 14 ft-lbs (19 Nm).
6.
Form No. F_041623
Rev 02
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
TABLE 1: SPRINKLER ORDERING INFORMATION
1: Available Finishes
Description
Suffix
Brass
ENT
JN
3,4
(Figure 1)
6
August 2023
2: Available Temperature Ratings
Nominal Rating
A
155 °F (68 °C)
200 °F (93 °C)
FREEDOM
RESIDENTIAL
®
CONCEALED PENDENT
SPRINKLER VK495 (K3.7)
Max. Ambient Ceiling
Bulb Color
Temperature
Red
100 °F (38 °C)
Green
150 °F (65 °C)
Page 2 of 7
5
Suffix
2
B
E
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