QUICK RESPONSE
EXTRA-LARGE ORIFICE
UPRIGHT SPRINKLER
VK531 (STORAGE-DENSITY/AREA)
TECHNICAL DATA
Form No. F_120699 18.10.11 Rev 18.2.P65
Page 5 of 5
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 2 (FM)
Quick Response Extra-Large Orifice Upright Sprinkler VK531
Maximum 175 PSI (12 Bar) WWP
Base Part
Number
1
SIN
Sprinkler
Style
Thread Size
Nominal K-Factor
Overall Length
FM Approvals
3
(Refer also to Design Criteria below.)
NPT
BSP
U.S.
metric
2
Inches
mm
10633
VK531
Upright
3/4”
20 mm
11.2
161.3
2-5/16
58.7
A1
Approved Temperature Ratings
A - 155 °F (68 °C), 175 °F (79 °C), 200 °F (93 °C), and 286 °F (141 °C)
Approved Finishes
1 - Brass, Chrome, and ENT
4
Footnotes
1
Base part number 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 FM Approvals available at the time of printing. Other approvals may be in process.
4
FM Approved as corrosion-resistant.
DESIGN CRITERIA - FM
(Also refer to Approval Chart 2 above.)
FM Approval Requirements:
Quick Response Extra-Large Orifice Upright Sprinkler VK531 is FM Approved as a quick response upright
Non-Storage
sprinkler and as a quick
response upright
Storage
sprinkler as indicated in the FM Approval Guide. For specific application and installation requirements, reference the latest
applicable FM Loss Prevention Data Sheets (including 2-0 and 8-9). FM Global Loss Prevention Data Sheets contain guidelines relating to, but not
limited to: minimum water supply requirements, hydraulic design, ceiling slope and obstructions, minimum and maximum allowable spacing, and deflec-
tor 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 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.
Replaces Form No. F_120699 Rev 18.2
(Added P65 Warning.)
