MICROFAST
®
QUICK
RESPONSE UPRIGHT
SPRINKLER VK327 (K4.2)
TECHNICAL DATA
Page 3 of 3
Form No. F_061514 21.03.05 Rev 21.1
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: [email protected]
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.
Approval Chart
Microfast
®
Quick Response
Upright Sprinkler VK327
Maximum 175 PSI
(
12 bar) WWP
Base Part
Number
1
SIN
Thread Size
Nominal K-Factor
Overall Length
Listings and Approvals
3
NPT
BSPT
U.S.
metric
2
Inches
mm
cULus
21269
VK327
1/2”
15 mm
4.2
57
2-3/16
56
A1, B2
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)
Approved Finishes
1 - Brass, Chrome, White Polyester
5,6
, and Black Polyester
5,6
2 - ENT
6
Footnotes
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.
DESIGN CRITERIA
(Also refer to Approval Chart 1 above.)
cULus Listing Requirements:
The Viking Microfast
®
Quick Response Upright Sprinkler VK327 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 sys-
tems only. Exception: 4.2K sprinklers may be installed on hydraulically calculated dry pipe systems where piping is corrosion resistant or internally
galvanized.
•
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 page 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.
Replaces Form F_061514 Rev 20.1
(Removed bushed part numbers)
