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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.
Thread Size
Base Part
SIN
Number
1
NPT
20991
VK340
1/2"
7
Approved Temperature Ratings
A - 135 °F (57 °C), 155 °F (68 °C), 175 °F (79 °C), 200 °F (93 °C), and
286 °F (141°C)
B - 155 °F (68 °C), 175 °F (79 °C), 200 °F (93 °C), and 286 °F (141°C)
1
Base part number is shown. For complete part number, refer to Viking's current price schedule.
2
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.
3
This table shows the listings and approvals available at the time of printing. Check with the manufacturer for any additional approvals.
4
Listed by Underwriters Laboratories Inc. for us in the U.S. and Canada
5
Other colors are available on request with the same Listings and Approvals as the standard colors.
6
cULus Listed as corrosion resistant.
7
Listings and Approvals limited to Light Hazard Occupancies where allowed by the installation standards being applied, with hydraulically calculated
wet systems only. Exception: 4.2K sprinklers may be installed on hydraulically calculated dry pipe systems where piping is corrosion resistant or
internally galvanized.
cULus Listing Requirements:
The Viking MicrofastHP
Quick Response Upright High Pressure Sprinkler VK340 is cULus Listed as indicated in Approval Chart 1 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.
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 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 organiza-
tions, and also with the provisions of governmental codes, ordinances, and standards, whenever applicable.
Form No. F_062114
21.03.05
TECHNICAL DATA
Approval Chart 1 (UL)
Viking MicrofastHP
High Pressure Sprinkler VK340
Maximum 250 PSI (17 bar) WWP
Nominal K-Factor
BSPT
U.S.
metric
2
15 mm
2.8
40.3
DESIGN CRITERIA - UL
(Also refer to Approval Chart 1 above.)
Rev 21.1
Quick Response Upright
®
Overall Length
Inches
mm
cULus
2-3/16
56
A1,B2
1 - Brass, Chrome, White Polyester
2 - ENT
6
Footnotes
MicrofastHP
QUICK
®
RESPONSE UPRIGHT HIGH
PRESSURE SPRINKLER
VK340 (K2.8)
Listings and Approvals
VdS
LPCB
--
--
Approved Finishes
, and Black Polyester
5,6
Replaces Form No. F_062114 Rev 20.1
(Removed bushed part numbers)
Page 3 of 3
3
--
5,6
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