upright sprinkler VK520 , K14
Viking Early Suppression Fast Response (ESFR) Upright Sprinkler VK520 is a
fast response fusible element type sprinkler designed for early fire suppression.
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.
Viking VK520 ESFR Upright Sprinklers may be used in the protection of ordinary
types of storage. However, they are primarily intended to protect the following
types of storage, which tend to produce severe-challenge fires: palletized and
solid pile storage and single, double, multiple row, and portable open rack storage
(no open-top containers or solid shelves).
Viking ESFR Upright VK520 Sprinklers provide protection of most common
storage materials up to 30 ft. (9.1 m) high in buildings up to 35 ft (10.7 m) high,
including:
–Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
–Cartoned unexpanded plastics*.
–Cartoned expanded plastics*.
* Refer the Approval Charts and Commodity Selection and Design Criteria Overview
for FM Approval requirements that must be followed.
In addition, some storage arrangements of rolled paper and rubber tire storage
may be protected by Viking ESFR Upright Sprinkler VK520.
