Viking MICROFAST VK326 Technical Data Manual page 3

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
NPT
20983 VK326 1/2"
Approved Temperature Ratings
A - 165 °F (74 °C), 205 °F (96 °C), 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 listings and approvals available at the time of printing. Check with the manufacturer for any additional approvals.
3
Listed by Underwriters Laboratories Inc. for us in the U.S. and Canada
4
Other colors are available on request with the same Listings and Approvals as the standard colors.
5
cULus Listed as corrosion resistant.
6
cULus Listing Requirements:
Quick Response Fusible Element Upright Sprinkler VK326 is cULus Listed as indicated in the Approval Chart for installation in accordance with the
latest edition of NFPA 13 for standard spray sprinklers.
Small orifice sprinklers are limited to Light Hazard where allowed by the installation standards being applied, with hydraulically calculated wet
•
systems only.
• Protection areas and maximum spacing shall be in accordance with the tables provided in NFPA 13. Maximum spacing allowed is 15 ft. (4.6 m).
Minimum spacing allowed is 6 ft. (1.8 m) unless baffles are installed in accordance with NFPA 13.
•
Minimum distance from walls is 4 in. (102 mm).
•
• Maximum distance from walls shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured per-
pendicular to the wall.
The sprinkler installation rules contained in NFPA 13 for standard spray upright sprinklers must be followed.
•
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
Approval Chart 1 (UL)
Microfast
Maximum 175 PSI (12 bar) WWP
Thread Size Nominal K-Factor
BSPT U.S.
15 mm 2.8
(Also refer to Approval Chart 1 above.)
Rev 21.1
TECHNICAL DATA
Quick Response Fusible Element
®
Upright Sprinkler VK326
Overall Length
metric Inches mm
2
40 2-1/4 58
1 - Brass, Chrome, White Polyester
2 - ENT
Footnotes
DESIGN CRITERIA - UL
MICROFAST
RESPONSE FUSIBLE
ELEMENT UPRIGHT
SPRINKLER VK326 (K2.8)
Listings and Approvals
cULus VdS
A1, A2 --
Approved Finishes
5
6
Page 3 of 4
QUICK
®
3
LPCB
-- --
, and Black Polyester
5