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Viking Launches New “K22 ESFR” Storage Sprinkler

Friday, July 5, 2013


Hastings, Michigan, USA - Viking Corporation, a global leader in fire protection and life safety systems, has introduced a new Early Suppression Fast Response (ESFR) pendent sprinkler with a K factor of 22.4 (320) for use in warehouses and other storage applications. The new model VK506 sprinkler uses a fast response fusible element and is approved to protect most common storage materials, including encapsulated and unencapsulated class I-IV commodities as well as expanded and unexpanded plastics.

Viking’s new K22 ESFR is cULus Listed and FM Approved for buildings up to 45 ft (13, 5 m) high and storage heights up to 40 ft (12,2 m), without the use of in-rack sprinklers. The VK506 sprinkler can be installed with the deflector located between 6 and 18 inches (152-457 mm) below the ceiling. The sprinkler is also dimensionally shorter than competitive products, which provides for additional flexibility when installing the product.

The new VK506 has a 1 inch NPT (2 5 mm BSP ) thread size and is available in 165°F (74°C) and 205°F (96°C) temperature ratings. With a K Factor of 22.4, the new VK506 provides ESFR storage protection at lower pressures compared to K14 and K17 ESFR sprinklers, and often requires a lower overall water demand when compared to a K25 ESFR sprinkler. As a result, the new VK506 may allow for reduced pipe sizes, smaller storage tanks, and the elimination of a fire pump in many storage applications.


Viking is a global leader in the manufacture and distribution of innovative fire protection and life safety systems. For over 90 years the company’s products and services have protected lives and property worldwide from the devastating effects of fire. For more information on Viking’s complete line of quality fire protection products and services, please visit or call 800-968-9501.