Viking VK502 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 VK502 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 14.0 (202 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. When properly installed, the
seal decreases the potential for leakage of air through the opening in the ceiling and consequent
formation of condensate around the sprinkler connection on the system piping. In freezer
installations, condensation can lead to ice build-up, which could inhibit sprinkler operation or cause
premature sprinkler operation. 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 prevent
humidity and temperature differential in the area around the sprinkler. The rubber seal is designed
with a material that will not drip when exposed to open flame. This protects the deflector from
acquiring material that would impede its water distribution characteristics.
Viking recommends use of the included insulating boot assemblies in accordance with
the installation instructions in this technical data page. Insulating boot assemblies
(optional) shall be installed on smooth, flat, and clean surfaces. There are specific
situations, such as corrugated ceiling panels, where alternative penetration sealing
methods are utilized. For additional information contact Viking Technical Services.
2. LISTINGS AND APPROVALS
FM Approved: Class 2008
Refer to the Approval Chart and Design Criteria for FM Approval requirements that must be
followed.
ESFR Dry sprinklers can ONLY be installed in Wet systems! Not for installation in dry
or preaction systems.
3. TECHNICAL DATA
Specifications:
Available since 2012.
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).
Connections: 2" grooved (refer to Figures 2 and 3) or
1-1/2" NPT or BSP Threaded (refer to Figures 4 and 5)
Nominal K-factor: 14.0 U.S. (202 metric)
Deflector Diameter: 1-13/32" (35.7 mm)
Overall Length: 18-5/8" (473 mm), 24-5/8" (625 mm), 30-5/8 (778 mm), 36-5/8" (930 mm)
Form No. F_042012 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
NOTICE
WARNING
July 2023
ESFR DRY PENDENT
SPRINKLER VK502 (K14.0)
ESFR Sprinkler VK502
(Grooved and Threaded)
Replaces Form No. F_042012 Rev 22.1
(Removed UL)
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