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Technical Data; Operation - Viking MicrofastHP VK341 Technical Data Manual

Quick response fusible element upright high pressure sprinkler

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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: techsvcs@vikingcorp.com
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 MicrofastHP
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.
Sprinkler Temperature
Classification
Ordinary
Intermediate
High
Sprinkler Finishes: Brass, Chrome, White Polyester
Corrosion Resistant Sprinkler Coatings: ENT
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.
The corrosion resistant coatings have passed the standard corrosion test required by the approving agencies indicated in the Approval Chart(s).
3
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.
cULus Listed as corrosion resistant.
4
For automatic sprinklers, the coatings indicated are applied to the exposed exterior surfaces only. Note that the spring is exposed on sprinklers with
5
Polyester coatings.
Form No. F_071414
21.03.05
Quick Response Upright High Pressure Sprinkler VK341 is available through a network of domestic and
®
TABLE 1: AVAILABLE SPRINKLER TEMPERATURE RATINGS AND FINISHES
Sprinkler Nominal
Temperature Rating
165 °F (74 °C)
205 °F (96 °C)
280 °F (138 °C)
, Black Polyester
5
3,4
Rev 21.1

TECHNICAL DATA

1
, and ENT
5
3,4
Footnotes
A
Figure 1: Sprinkler Wrench
MicrofastHP
RESPONSE FUSIBLE ELEMENT
UPRIGHT HIGH PRESSURE
SPRINKLER VK341 (K2.8)
Maximum Ambient
Ceiling Temperature
2
100 °F (38 °C)
150 °F (65 °C)
225 °F (107 °C)
Page 2 of 3
QUICK
®
Frame Paint
Color
None
White
Blue

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