Viking Early Suppression Fast Response (ESFR) Pendent Sprinkler VK510 incorporates the capability to suppress specific high-challenge fires. The addition of a larger K-Factor allows ESFR performance at lower end-head pressures than ESFR K14 sprinklers. K25.2 ESFR sprinklers can:

• Eliminate the use of in-rack sprinklers when protecting high-piled storage of certain specified materials up to specific heights.*
• Reduce or eliminate the need for a system fire pump.
• Provide flexibility when sizing system piping.

Viking VK510 ESFR Pendent Sprinklers 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 VK510 Sprinklers provide protection of most common storage materials, including:
• Encapsulated or unencapsulated Class I, II, III, and IV commodities*.
• cULus Listed for protection of cartoned unexpanded plastic commodities and FM Approved for protection of cartoned and uncartoned unexpanded plastic commodities*.
• FM Approved for protection of exposed expanded polystyrene and exposed expanded polyurethane commodities*.