Viking VK504 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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1. DESCRIPTION
Viking Early Suppression Fast Response (ESFR) Dry Pendent Sprinkler VK504 is a fast
response fusible element type sprinkler designed for use in storage areas subject to freezing and
supplied from a wet system only, in an adjacent heated area. With a 16.8 (242 metric*) nominal
K-Factor and special deflector, this sprinkler produces large, high-momentum water droplets in
a hemispheric pattern below the deflector. This permits penetration of the fire plume and direct
wetting of the burning fuel surface while cooling the atmosphere early in the development of a
high-challenge fire.
The dry ESFR sprinkler consists of a fusible element style ESFR sprinkler permanently secured
to a special supply nipple. The sprinkler assembly features a sealed brass inlet that's grooved or
threaded. Also included with the ESFR dry sprinkler are two insulating boot assemblies (optional)
to help seal the clearance space around the dry sprinkler barrel. The dry sprinkler boot assembly
is intended to slow the exchange of air between the inside and outside of the freezer (or any dry
sprinkler installation) to help mitigate condensation and humidity and temperature differentials in
the area around the sprinkler. Condensation can lead to ice build-up, which could inhibit sprinkler
operation or cause premature operation.
For the included insulating boot assemblies (optional) follow the installation instructions in this
technical data page. Insulating boot assemblies (optional) shall be installed on smooth, flat,
rigid, and clean surfaces. There are specific situations such as the presence of corrugated
ceiling panels, or temperature and ventilation differences where alternative penetration sealing
methods can be utilized. Figure 1A illustrates alternative sealing methods; however, this Figure is
only intended as a guide and does not represent all possible scenarios. For additional information
contact Viking Technical Services.
ESFR Dry Sprinkler VK504 requires storage to be arranged single row, double row, or multiple row
open rack storage (no open-top containers or solid shelves). In-rack sprinklers are not required.
ESFR Dry Sprinkler VK504 shall be located in accordance with Design Criteria and the latest
recognized storage installation rules of NFPA 13.
Viking ESFR Dry Pendent VK504 Sprinklers provide protection of most common storage materials,
open-framed rack storage arrangements of Class I, II, III, and IV commodities, and cartoned
unexpanded plastic up to 35ft. (10.7m) storage with a 40ft. (12.0m) ceiling height* with no in-rack
sprinklers.*
• For specific application and installation requirements, reference the latest applicable FM Loss Prevention
Data Sheets (including Data Sheet 2-0 and 8-9).
* Refer the Approval Chart and Design Criteria for UL and FM Listing/Approval requirements that must be
followed.
2. LISTINGS AND APPROVALS
UL Listed: Category VNWH
FM Approved: Class 2008
Refer to the Approval Chart and Design Criteria for UL and FM Listing/Approval requirements that
must be followed.
Successfully meets new UL 1767 test standard and compliance program for ESFR
sprinklers installed in rack storage with high clearances to ceiling (20 ft or greater).
ESFR Dry sprinklers can ONLY be installed in Wet systems! Not for installation in dry
or preaction systems.
3. TECHNICAL DATA
Specifications:
Available since 2013.
Tube diameter: 1-11/16" (43.86 mm)
Minimum Operating Pressure: Refer to NFPA 13 or FM Loss Prevention Data Sheets 8-9.
Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Form No. F_062613 19.06.24
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
NOTICE
WARNING
Rev 19.1
ESFR DRY PENDENT
SPRINKLER VK504 (K16.8)
ESFR Sprinkler VK504
(Grooved and Threaded)
Replaces Form No. F_062613 Rev 18.2.P65
(Added patent number.)
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