Technical Specifications - Viking VK3522 Technical Data Sheet

4. TECHNICAL SPECIFICATIONS

4.1 Definitions
Standard Pendent Sprinkler: A sprinkler intended to be oriented with the deflector below the frame so water flows
downward through the orifice, striking the deflector and forming an umbrella-shaped spray pattern downward. These
sprinklers are marked "SP/RP" (Standard Pendent/Recessed Pendent). When a standard pendent sprinkler is used
with a recessed escutcheon, it becomes a recessed pendent sprinkler.
Recessed Sprinkler: A spray sprinkler assembly intended for installation with a concealed piping system. The
assembly consists of a sprinkler installed in a decorative adjustable recessed escutcheon that minimizes the protrusion
of the sprinkler beyond the ceiling or wall without adversely affecting the sprinkler distribution or sensitivity. Refer to the
appropriate technical data page for allowable sprinkler models, temperature ratings, and occupancy classifications.
NOTICE: Do not recess any sprinkler not listed or approved for use with the escutcheon. Refer to Section 5.
Corrosion Resistant Sprinkler: A special service sprinkler with non-corrosive protective coatings, or that is fabricated
from non-corrosive material, for use in atmospheres that would normally corrode sprinklers. Sprinklers can be ordered
as corrosion resistant sprinklers and can be used with escutcheons when allowed by the approval body.
4.2 Ratings and Physical Characteristics
Parameter
Minimum operating pressure
Maximum rated pressure
Factory tested pressure
Thread size
Nominal K–factor
Minimum temperature rating (glass bulb)
F_111420 Rev 03 April 2023
TECHNICAL DATA SHEET
Value
7 psi (0.5 bar)
175 psi (12 bar)
500 psi (35 bar)
1/2" NPT or 15 mm BSPT
8.0 U.S. (115)
–65 °F (–55 °C)
VK3522 Quick Response
Pendent Sprinkler K8.0 (115)
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