
MicrofastHP®QUICK
RESPONSE FUSIBLE
ELEMENT HSW HIGH PRES-
SURE SPRINKLER VK346 (K2.8)
TECHNICAL DATA
Page 3 of 5
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
T
elephone:
269-945-9501
T
echnical
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.
Form No. F_071614 21.03.05 Rev 21.1
Approval Chart 1 (UL)
MicrofastHP® Quick Response Fusible Element
HSW Sprinkler VK346
Maximum 250 PSI WWP
For Light or Ordinary Hazard Occupancies
Deflector must be located 4” to 6” (102 mm to 152 mm) below the ceiling.
Base Part
Number1SIN Maximum
Pressure
Thread Size Nominal
K-Factor Overall Length Listings and Approvals3
(Refer also to Design Criteria below.)
NPT BSPT U.S. metric2Inches mm cULus4LPCB
20996 VK346 250 psi 1/2” 15 mm 2.8 40.3 2-1/2 64 A1X, B1Y, A2X, B2Z -- -- --
Approved Temperature Ratings
A - 165 °F (74 °C), 205 °F (96 °C), 280 °F
(138 °C)
B - 165 °F (74 °C) and 205 °F (96 °C)
Approved Finishes
1 - Brass, Chrome, White Polyester6,
and Black Polyester6
2 - ENT7
Approved Escutcheons
X - Installed with standard surface-mounted escutcheons
Y - Installed with standard surface-mounted escutcheons or re-
cessed with the Viking Micromatic® Model E-1, E-2, or G-1
Recessed Escutcheon
Z - Installed with standard surface-mounted escutcheons or
recessed with the Viking Micromatic®Model E-1 Recessed
Escutcheon
Footnotes
1Base part number shown. For complete part number, refer to Viking’s current price schedule.
2Metric 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.
3This table shows the listings and approvals available at the time of printing. Other approvals may be in process.
4Listed by Underwriters Laboratories Inc. for use in the U.S. and Canada.
5Meets New York City requirements, effective July 1, 2008.
6Other colors are available on request with the same Listings and Approvals as the standard colors.
7cULus Listed as corrosion resistant.
DESIGN CRITERIA - UL
(Also refer to Approval Chart 1 above.)
cULus Listing Requirements:
Quick Response Horizontal Sidewall Sprinkler VK346 is cULus Listed as indicated in the Approval Chart for installation in accordance with the latest
edition of NFPA 13 for sidewall standard spray sprinklers.
• Small orifice sprinklers are limited to Light Hazard Occupancies with hydraulically calculated wet systems only.
• Protection areas and maximum spacing shall be in accordance with the tables provided in NFPA 13. Minimum spacing allowed is 6 ft. (1.8 m).
• Refer to the Approval Chart for allowable deflector distance below the ceiling. Align with the leading edge of the deflector parallel to the ceiling.
• Maximum distance from end walls shall be no more than one-half of the allowable distance between sprinklers. The distance shall be measured
perpendicular to the wall. Minimum distance from end walls is 4 in. (102 mm).
• The sprinkler installation and obstruction rules contained in NFPA 13 for sidewall standard spray sprinklers must be followed.
IMPORTANT: Always refer to Bulletin Form No. F_091699 - Care and Handling of Sprinklers. Also refer to 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, LPCB, APSAD,
VdS or other similar organizations, and also with the provisions of governmental codes, ordinances, and stan-
dards, whenever applicable.