Viking MICROFAST VK326 Technical Data Manual page 4

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.
Base Part
SIN
Number
1
20983 VK326
Approved Temperature Ratings
A - 165 °F (74 °C), 205 °F (96 °C), and 280 °F (138 °C)
Base part number is shown. For complete part number, refer to Viking's current price schedule.
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 table shows the FM Approvals available at the time of printing. Check with the manufacturer for any additional approvals.
3
FM Approval Requirements:
The Microfast Quick Response Fusible Element Upright Sprinkler VK326 is FM Approved as a quick response Non-Storage upright sprinkler as indi-
®
cated in the FM Approval Guide. For specific application and installation requirements, reference the latest applicable FM Loss Prevention Data Sheets
(including Data Sheet 2-0). FM Global Loss Prevention Data Sheets contain guidelines relating to, but not limited to: minimum water supply require-
ments, hydraulic design, ceiling slope and obstructions, minimum and maximum allowable spacing, and deflector distance below the ceiling.
NOTE: The FM installation guidelines may differ from cULus and/or NFPA criteria.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to Bulletin Form No.
F_080614 for general care, installation, and maintenance information. Viking sprinklers are to be installed in accordance with
the latest edition of Viking technical data, the appropriate standards of NFPA, FM Global, LPCB, APSAD, VdS or other similar
organizations, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.
Form No. F_063014 21.03.05
TECHNICAL DATA
Approval Chart 2 (FM)
Microfast Quick Response Fusible Element
®
Upright Sprinkler VK326
Maximum 175 PSI (12 bar) WWP
Thread Size Nominal K-Factor
NPT BSPT U.S.
1/2" 15 mm 2.8
DESIGN CRITERIA - FM
(Also refer to Approval Chart 2 above.)
Rev 21.1
Overall Length
metric Inches mm
2
40 2-1/4 58
1 - Brass, Chrome, and ENT
Footnotes
MICROFAST QUICK
®
RESPONSE FUSIBLE
ELEMENT UPRIGHT
SPRINKLER VK326 (K2.8)
FM Approvals
(Refer also to Design Criteria below.)
A1
Approved Finishes
Replaces Form No. F_063014 Rev 20.1
(Removed bushed part numbers)
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