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VK506 - ESFR Pendent Sprinkler (K22)

VK506 - ESFR Pendent Sprinkler (K22)

The model VK506 is a cULus Listed and FM Approved, Early Suppression Fast Response (ESFR) type storage sprinkler capable of suppressing specific high-challenge fires.  ESFR sprinklers can eliminate the use of in-rack sprinklers when protecting high-piled storage of certain specified materials up to:
UL: 40 ft. (12,2 m) with ceilings up to 45 ft. (13,7 m)*
FM: 45 ft. (13,7 m) with ceilings up to 50 ft. (15,2 m)*
They can also reduce or eliminate the need for a system fire pump and provide flexibility when sizing system piping.  Viking VK506 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).
* Refer Technical Data, Approval Charts and Commodity Selection and Design Criteria Overview for cULus Listing and FM Approval requirements that must be followed.

Technical Details

K Factor: 

320 metric





Part Number: 


VK Number: 


Additional Information: 

NOTICE: The product details indicated below are for general reference only and may vary based on the specific product approval and/or application. Always verify product details with the technical data sheet and consult with the Authority Having Jurisdiction (AHJ).

Max Pressure: 

175 psi (12 bar)

Response Type: 

Fast (ESFR)

Occupancy Type: 


Thread Size: 

1" NPT (25 mm BSP)

Min Spacing: 

Per Standards / Listings

Max Spacing: 

Per Standards / Listings

Documents and Resources

Technical Data & Instructions


Revit® Files

Approval Certificates

Additional Technical Information