Viking VK449 Technical Data Sheet

1. PRODUCT IDENTIFICATION
This document covers the following products, hereafter referred to as "sprinkler":
VK449: Fast Response, Residential Horizontal Sidewall, K4.0 (57.7 metric)
Sprinklers
2. INTENDED USE
The spinklers are designed for wet systems where it is necessary to prevent
water or condensation from entering the supply nipple before sprinkler operation.
They may also be installed in spaces subject to freezing and supplied from a
wet system in an adjacent heated area. The sprinkler is intended to be used in
automatic fire sprinkler systems as allowed by applicable approval authorities.
The sprinkler must be used in accordance with:
1. the sprinkler's Listings, Approvals, and associated design requirements
2. the recognized design and installations standards issued, for example NFPA
or FM Global.
3. the latest revisions of all applicable manufacturer's documentation
Additionally, the provisions of governmental codes, ordinances, and standards
may apply.

NOTE: The Installation guidelines and requirements may differ depending on the approval body.
3. LISTINGS AND APPROVALS
Refer to section 6 for requirements that must be followed.
cULus Listed
Refer to the Approval Chart and Design Criteria for Listing and Approval requirements that must be followed.
4. TECHNICAL SPECIFICATIONS
4.1 Ratings and Physical Characteristics
Parameter
Minimum operating pressure
Maximum rated pressure
Factory tested pressure
Thread size
Nominal K–factor
Minimum temperature rating (glass bulb)
Available since April 2023.
Form No. F_061721 Rev 03
TECHNICAL DATA SHEET
Value
7 psi (0.5 bar)
175 psi (12 bar)
500 psi (34.5 bar)
1" NPT or 25 mm BSPT
4.0 U.S. (57.7 metric)
–65 °F (–55 °C)
April 2023
Page 1 of 10
RESIDENTIAL DRY HSW
SPRINKLER K4.0 (57.7)
VK449
Replaces Form No. F_061721 Rev 02
(Removed 175 deg.)