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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.
Sprinkler Cabinets:
A. Six-head capacity: Part No. 01724A (available since 1971)
B. Twelve-head capacity: Part No. 01725A (available since 1971)
NOTE: Not for use with the Viking Residential Sprinkler Extension.
4. INSTALLATION
Refer to appropriate NFPA Installation Standards.
5. OPERATION
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. Water flowing through the sprinkler orifice
strikes the sprinkler deflector, forming a uniform spray pattern to
extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance require-
ments.
7. AVAILABILITY
The Viking Model VK458 Sprinkler 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.
TABLE 1: AVAILABLE SPRINKLER TEMPERATURE RATINGS AND FINISHES
Sprinkler Temperature
Classification
Ordinary
Intermediate
Sprinkler Finishes: Brass, Chrome, White Polyester
The sprinkler temperature rating is stamped on the deflector.
1
Based on NFPA-13. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having Jurisdiction.
2
Refer to specific installation standards.
Sprinklers with ENT, White Polyester, and Black Polyester finishes are C-UL-US-EU Listed as corrosion resistant.
3
The ENT coating has passed the standard corrosion test required by the approving agencies indicated in the Approval Chart. 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 ENT coated sprinklers, the waterway is coated. Note that the spring is exposed on sprinklers with ENT coating.
Form No. F_042005
Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Sprinkler Nominal
Temperature Rating
155 °F (68 °C)
175 °F (79 °C)
November 2022
Figure 1:
Maximum Ambient
Ceiling Temperature
1
, Black Polyester
, and ENT
3
3
Footnotes
FREEDOM
RESIDENTIAL
®
PENDENT SPRINKLER
VK458 (K7.4)
Standard Sprinkler Wrench 21475M/B
2
100 °F (38 °C)
150 °F (65 °C)
3,4
Page 2 of 5
Bulb Color
Red
Yellow
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