ESFR PENDENT SPRINKLER
VK503 (K16.8)
TECHNICAL DATA
Page 5 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
DESIGN CRITERIA - UL
(Also refer to Approval Chart 1 on page 3.)
cULus Listing Requirements:
ESFR Pendent Sprinkler VK503 is cULus Listed as indicated in the Approval Chart for installation in accordance with the latest appropriate NFPA
standards (including NFPA 13) for ESFR Pendent K16.8 (242 bar) Sprinklers, for:
•
Protecting rack storage of certain specified materials up to 35 ft (10.7 m) high in buildings with 40 ft (12.2 m) high ceilings with NO in-rack
sprinklers.
•
Protecting rack storage of certain specified materials up to 40 ft (12.2 m) high in buildings with 45 ft (13.7 m) high ceilings with one row of in-
rack sprinklers.
•
NFPA 13 indicates the following for ESFR pendent sprinklers having a 16.8 nominal K-Factor: Position the deflector a maximum of
14”
(356 mm)
and a minimum of
6”
(152 mm) below the ceiling.
•
The minimum area of coverage allowed per sprinkler is 64 ft
2
(5.8 m
2
) per NFPA 13.
Maximum Roof or Ceiling Slope:
2 in 12 (167 mm/m or 9.5 degrees).
Sprinkler Position:
Approved for use only in the pendent position. Align the deflector parallel with the ceiling or roof.
System Type:
Wet systems only.
Deflector Distance from Walls:
At least 4” (102 mm) from walls, and no more than one-half the allowable distance permitted between sprinklers.
Clearance from Deflector to Top of Storage:
At least 36” (914 mm).
Maximum Distance Between Sprinklers:
The maximum area of coverage allowed per sprinkler is 100 ft
2
(9.3 m
2
)**.
•
For buildings over 30 ft (9.1 m) high, spacing between sprinklers and/or branch lines must be from 8 to 10 ft (2.4 to 3.1 m)**.
•
For building heights up to 30 ft (9.1 m), the spacing allowed between sprinklers and/or branch lines is 8 to 12 ft (2.4 to 3.7 m), provided the
area covered per sprinkler does not exceed the maximum 100 ft
2
(9.3 m
2
) allowed**.
**Refer to the Installation Standards for permissible deviations from the maximum sprinkler/branch line spacing rules above, to eliminate obstruc-
tions created by trusses and bar joists when using ESFR sprinklers.
Minimum Area of Coverage:
The minimum area of coverage allowed per sprinkler is 64 ft
2
(5.8 m
2
).
Note:
If the ceiling is beam and girder or panel construction, locate sprinklers in the bays rather than under the beams.
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
standards of VdS, NFPA, and any other Authorities Having Jurisdiction, and also with provisions of governmental
codes, ordinances, and standards whenever applicable.
Approval Chart 1 (UL)
ESFR Pendent Sprinkler VK503
Maximum 175 PSI (12 bar) WWP
Base Part
Number
1
SIN
NPT Thread
Size
Nominal
K-Factor
Overall Length
Listings and Approvals
3,4
(Refer also to Design Criteria on page 4.)
Inches mm
U.S. metric
2
Inches mm
cULus
5
NYC
6
VdS
LPCB
China
Approval
14073
VK503
3/4”
--
16.8
242
2-7/8
73
A1
A1
--
--
--
--
14818
VK503
--
20 mm 16.8
242
2-7/8
73
A1
A1
--
--
--
--
20372
7
VK503
--
20 mm 16.8
242
2-7/8
73
B1
--
--
--
--
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 listings and approvals available at the time of printing. Other approvals may be in process.
4
Refer to the latest standards of NFPA 13.
5
Listed by Underwriters Laboratories Inc. for use in the U.S. and Canada.
6
Accepted for use, City of New York Department of Buildings, MEA Number 89-92-E, Vol. 41.
7
Approved according to China GB Standard.
