Viking V-HIP Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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1. DESCRIPTION
The VK660 is a Specific Application Attic Sprinkler designed to provide superior
fire protection in combustible and non-combustible sloped attic spaces when
compared to standard spray attic protection. With specific application criteria for
use with Model V-BB (Back to Back), Model V-SD (Single Directional), and Attic
Upright Specific Application Sprinklers, the Viking attic sprinklers provide an ex-
tended coverage spacing alternative to standard spray sprinklers. They make it
possible to use a single line of piping at the attic peak, eliminating the need for
branch lines and greatly reducing the number of required sprinklers and associ-
ated material and installation costs.
Viking Attic Sprinklers can be installed with either steel or CPVC piping (CPVC
allowed on wet pipe systems only), and are available in brass or with corrosion-
resistant Electroless Nickel PTFE (ENT) coatings where salt water and other
corrosive elements are a consideration. They are cULus Listed with specific ap-
plication guidelines for use as special sprinklers as defined by the National Fire
Protection Association (NFPA), and are cULus Listed for extended coverage in
combustible and non-combustible construction. The cULus Listing was achieved
using full-scale fire tests within wood truss construction.
The VK660 sprinkler offers coverage for the hip area of the attic. Like the models
V-BB and V-SD the VK660 throws a water pattern down the slope of the attic;
however, the VK660 is located along the hip rather than the ridge and throws
water toward the outer edge of the attic space in a 90° pattern allowing the water
to trap the fire in the corner.
The VK660 sprinkler provides reduced response time due to its narrow spacing of
6 ft. (1,8 m) and maximum throw capability of 28 ft (measured horizontally). The
VK660 sprinkler is installed with the flow shaper parallel with the slope to allow
maximum coverage of the eaves and hip area.
2. LISTINGS AND APPROVALS
cULus Listed: Category VNIV
Refer to the Approval Charts and Design Criteria on for cULus Listing requirements that must be followed.
3. TECHNICAL DATA
Specifications:
Minimum Operating Pressure: See Design Criteria - UL on page 4.
Rated to 175 psi (12 bar) water working pressure
Factory tested hydrostatically to 500 psi (34.5 bar)
Thread size: 1/2" (15 mm) NPT
Nominal K-Factor: 5.6 U.S. (80.6 metric*)
* Metric K-factor measurement shown is when pressure is measured in Bar. When pressure is measured in kPa, divide the metric K-factor shown by 10.0.
Glass-bulb fluid temperature rated to -65 °F (-55 °C)
Overall Length: 2-11/16" (68 mm)
Material Standards:
Frame Casting: Brass UNS-C84400 or QM Brass
Flow shaper: Brass UNS-C36000
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Screw: 18-8 Stainless Steel
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
Yoke: Phosphor Bronze - UNS-C51000
Flow shaper Screw: Stainless Steel UNS-S31600
Form No. F_092116 Rev 01
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
February 2023
MODEL V-HIP
SPECIFIC APPLICATION
ATTIC SPRINKLER
VK660
VK660 V-HIP Attic Sprinkler
SIN K-factor
VK660 5.6 (80.6 metric)
Replaces Form No. F_092116 Rev 20.1
(added foam insulation
Page 1 of 9
Pitch
4:12 < 12:12
note.)