The patented Viking vk680 nozzle with flat plate conceals the sprinkler next to it is cULus Listed as a career extension sprinkler. The VK680 has a NPT thread size of ¾ in (20 mm) and a K-factor of 8.0 (115). The sprinkler is cULus listed for coverage areas up to and including 16' x 24' (4.9 x 7.3 m) and 18' x 22' (5.5 m x 6.7 m) . Additionally, it has a temperature rating of 165°F (74°C) and can be installed up to 12" (305 mm) below the ceiling to better accommodate potential installation obstructions, such as lights. light.

The Viking VK680 nozzle has a compact design, with a total length of only 2 inches (51 mm), allowing for easier installation in tight wall spaces. The VK680 commercial sprinkler cover is supplied in standard white and has a temperature rating of 135°F (57°C). Through Viking's industry leading custom paint program, Viking can apply virtually any brand and type of paint to the cover.
Specifications Viking VK680
- Maximum operating pressure: 7 psi (0.5 bar)
- Maximum working pressure: 175 psi (12 Bar).
- Factory hydrostatically tested to 500 psi (34.5 bar).
- Reading size: 3/4” (20mm)
- K-factor NPT: 8.0 U.S (115.2 meters) Measurement of K-factor in metric system. When the pressure is measured in kPa, divide the K-factor by the factor displayed by 10.0.
- Horizontal adjustment of visor available: 1/4 1/4 (6.4 mm)
- Overall length (Sprinkler body): 2 Burners (50.8 mm)
Instructions for installing Viking 680



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