INSTITUTIONAL SPRINKLERS K5.6
TECHNICAL DATA
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
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Form No. F_032319 20.01.03 Rev 20.1
© 2020 Viking Group Inc. All rights reserved
1. DESCRIPTION
Viking Institutional Style Sprinklers are small, flush, solder link and lever sprinklers
made with tamper-resistant construction. These flush-mount sprinklers can be
ordered as Quick Response, Quick Response-Extended Coverage, and as Pendent
or Horizontal Sidewall configurations. Viking institutional sprinklers have been
specifically designed for use with concealed piping in institutional mental health
occupancies, correctional facilities, or anywhere a likelihood of tampering with fire
sprinklers by the occupants may exist.
The institutional sprinkler assembly consists of the sprinkler body and a 3 or 4 inch
escutcheon plate. The sprinkler and escutcheon plate are available with a polished
chrome or painted finish.
2. LISTINGS AND APPROVALS*
cULus Listed
: Category VNIV
Pendent: cULus Listed as Quick Response Flush sprinklers for standard areas of
coverage in Light or Ordinary Hazard occupancies.
EC Pendent: cULus Listed as Quick Response, Extended Coverage Flush sprinklers
for extended areas of coverage up to 16’ x 16’ (4.9 m x 4.9 m) in Light Hazard
occupancies only.
HSW: cULus Listed as Quick Response Flush sprinklers for standard areas of coverage
in Light or Ordinary Hazard occupancies below smooth, flat, horizontal ceilings only.
EC HSW: cULus Listed as Quick Response, Extended Coverage Flush sprinklers for
extended areas of coverage up to 16’ x 16’ (4.9 m x 4.9 m) in Light Hazard occupancies
only below smooth, flat, horizontal ceilings.
* Refer to the Approval Chart and Design Criteria for requirements that must be followed.
NOTICE
THE VIKING CORPORATION DISCLAIMS ANY RESPONSIBILITY FOR
DAMAGES OR INJURY (INCLUDING DEATH) CAUSED BY THE OPERATION
OR INOPERATION OF SPRINKLERS ARISING OUT OF THE MISUSE OF OR
TAMPERING WITH VIKING BRAND SPRINKLERS INCLUDING, WITHOUT
LIMITATION, ANY PERSONAL INJURY OR DEATH ARISING OUT OF OR
CAUSED BY THE MANIPULATION OF, DISMANTLING OF, OR ATTEMPTED
USE OF THE SPRINKLER OR ANY COMPONENT AS AN INSTRUMENT
UNRELATED TO ITS INTENDED USE.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: 7 psi (0.5 bar)
Rated to: 175 psi (12 bar) water working pressure.
Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 1/2” NPT or 15 mm BSPT
Nominal K-factor: 5.6 U.S. (80.6 metric**)
** Metric K-factor measurement shown is in Bar. When pressure is measured in kPa, divide the
metric K-factor shown by 10.0.
Material Standards:
Sprinkler Body: QM Brass or UNS-C84400 Casting
Deflector: Pendent - Copper UNS-C23000, HSW - Copper UNS-C51000
Deflector Pins: Stainless Steel 302
Button: UNS-C36000
Compression Screw: Brass UNS-C36000
Fusible Link Assembly: UNS-C51910 and Eutectic Solder
Fusible Link Levers: Stainless Steel UNS-S31600
Lever Bar: Copper Alloy UNS-C72500
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Seat: UNS-C31400 or UNS-C31600 Bronze 1/2 to full hard
Pin Ring: Pendent - Copper UNS-C23000, HSW - Copper UNS-C51000
Ordering Information: (Refer to Table 1 and the current Viking List Price Book.)
SIN
THREAD DESCRIPTION
VK426 NPT
QR Pendent
VK650 NPT
QR EC Pendent
VK427 NPT
QR HSW
VK651 NPT
QR EC HSW
VK426 BSPT
QR Pendent
VK650 BSPT
QR EC Pendent
VK427 BSPT
QR HSW
VK651 BSPT
QR EC HSW
Replaces F_032319 Rev 19.2
(Replaced escutcheon PNs)
