MICROFAST
®
QUICK
RESPONSE FUSIBLE
ELEMENT UPRIGHT
SPRINKLER VK328 (K4.2)
TECHNICAL DATA
Page 2 of 3
Form No. F_071114 21.03.05 Rev 21.1
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.
5. OPERATION
During fire conditions, the heat-sensitive fusible element assembly disengages, releasing the seat and spring assemblies to open
the waterway. 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 requirements.
7. AVAILABILITY
The Viking Microfast
®
Quick Response Upright Fusible Element Sprinkler VK328 is available through a network of domestic and interna-
tional 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
Sprinkler Nominal
Temperature Rating
1
Maximum Ambient
Ceiling Temperature
2
Frame Paint
Color
Ordinary
165 °F (74 °C)
100 °F (38 °C)
None
Intermediate
205 °F (96 °C)
150 °F (65 °C)
White
High
280 °F (138 °C)
225 °F (107 °C)
Blue
Sprinkler Finishes:
Brass, Chrome, White Polyester
5
, Black Polyester
5
and ENT
3,4
Corrosion Resistant Sprinkler Coatings:
ENT
3,4
Footnotes
1
The sprinkler temperature rating is stamped on the deflector.
2
Based on NFPA-13. Other limits may apply, depending on fire loading, sprinkler location, and other requirements of the Authority Having Jurisdiction.
Refer to specific installation standards.
3
The corrosion resistant coatings have passed the standard corrosion test required by the approving agencies indicated in the Approval Chart(s).
These tests cannot and 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. Note that the spring is exposed on sprinklers with ENT coatings. For ENT coated automatic
sprinklers, the waterway is coated.
4
cULus Listed as corrosion resistant.
5
For automatic sprinklers, the coatings indicated are applied to the exposed exterior surfaces only. Note that the spring is exposed on sprinklers with
Polyester coatings.
Figure 1:
Standard Sprinkler Wrench 21475M/B
Protective Sprinkler Cap
Wrench Flat
