ESFR PENDENT SPRINKLER
VK503 (K16.8)
TECHNICAL DATA
Page 6 of 6
Form No. F_120106 19.11.15 Rev 19.1
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: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page: www.vikinggroupinc.com
Approval Chart 2 (FM)
ESFR Pendent Sprinkler VK503
Maximum 175 PSI (12 bar) WWP
Base Part
Number
1
SIN
NPT Thread Size
Nominal K-Factor
Overall Length
FM Approvals
3,4
(Refer also to Design Criteria below.)
Inches
mm
U.S.
metric
2
Inches
mm
14073
VK503
3/4”
--
16.8
242
2-7/8
73
A1
14818
VK503
--
20 mm
16.8
242
2-7/8
73
A1
20372
5
VK503
--
20 mm
16.8
242
2-7/8
73
B1
Approved Temperature Ratings
A - 165 °F (74 °C) and 205 °F (96 °C)
B - 165 °F (74 °C)
Approved Finish
1 - Brass
Footnotes
1
Base part number shown. For complete part number, refer to the price list.
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 chart shows the FM Approvals available at the time of printing. Other approvals may be in process.
4
FM Approved as a quick response pendent
Non-Storage
sprinkler and also FM Approved as a quick response pendent
Storage
sprinkler. Refer to
Design Criteria below.
5
Approved according to China GB Standard.
DESIGN CRITERIA - FM
(Also refer to Approval Chart 2 above.)
FM Approval Requirements:
1. Sprinkler VK503 is FM Approved as a quick response pendent
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 Data Sheets
2-0 and 8-9).
2. Sprinkler VK503 is also FM Approved as a quick response pendent
Non-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 Data Sheet 2-0).
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 deflector 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. Viking ESFR
Pendent Sprinklers are to be installed in accordance with the latest edition of Viking technical data, the latest
applicable FM Global Loss Prevention Data Sheets, including 2-0 and 8-9, applicable standards of NFPA, and any
other Authorities Having Jurisdiction, and also with provisions of governmental codes, ordinances, and standards
whenever applicable.
Replaces Form No. F_120106 Rev 18.1.P65
(Revised China Approval; removed 19856.)
