Viking Early Suppression Fast Response (ESFR) Pendent Sprinkler VK500 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 VK500 ESFR Pendent 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 Pendent VK500 Sprinklers provide protection of most common storage materials, including:

-Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
-Cartoned and uncartoned unexpanded plastics*.
-Cartoned and uncartoned expanded plastics*.