Viking FREEDOM VK470 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
Viking Freedom Residential Pendent Sprinkler VK470 is a thermosensitive, glass-bulb
®
residential sprinkler available in several different finishes and temperature ratings to meet
varying design requirements. The Electroless Nickel PTFE (ENT) coating has been inves-
tigated for installation in corrosive atmospheres and is C-UL-US-EU Listed as corrosion
resistant as indicated in the Approval Chart. The sprinkler orifice design, with a K-Factor
of 3.0 (43.2 metric*), allows efficient use of available water supplies for the hydraulically
designed fire-protection system. The glass bulb operating element and special deflector
characteristics meet the challenges of residential sprinkler standards.
2. LISTINGS AND APPROVALS
UL Listed (C-UL-US-EU): Category VKKW
Refer to the Approval Chart and Design Criteria for C-UL-US-EU Listing require-
ments that must be followed.
3. TECHNICAL DATA
Specifications:
Avaiilable since 2012.
Minimum Operating Pressure: Refer to the Approval Chart.
Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar).
Thread size: 1/2" (15 mm) NPT
Nominal K-Factor: 3.0 U.S. (43.2 metric*)
* Metric K-factor measurement shown is 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: 2-1/4" (58 mm)
Covered by the following U.S. Patent: 9,265,981
Material Standards:
Frame Casting: QM Brass
Deflector: Phosphor Bronze UNS-C51000 or Brass UNS-C23000
Bulb: Glass, nominal 3 mm diameter
Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape
Compression Screw: Brass UNS-C36000
Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400
For ENT coated sprinklers: Belleville spring - Exposed, Screw and Pipcap - ENT plated.
Available Finishes and Temperature Ratings:
Finish Brass
Suffix
Temperature 155 °F (68 °C)
Suffix
Ordering Information: (Refer to Table 1 and the current Viking price list.)
4. INSTALLATION
Refer to appropriate NFPA Installation Standards.
5. OPERATION
During fire conditions, the heat-sensitive liquid in the glass bulb expands, causing the glass to shatter, releasing the pip cap and
sealing spring assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern
to extinguish or control the fire.
6. INSPECTIONS, TESTS AND MAINTENANCE
Refer to NFPA 25 for Inspection, Testing and Maintenance requirements.
Form No. F_061011 Rev 01
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Chrome White Polyester Black Polyester
A F
175 °F (79 °C)
B D
November 2022
TECHNICAL DATA
M-/W M-/B
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FREEDOM RESIDENTIAL
®
PENDENT SPRINKLER
VK470 (K3.0)
ENT
JN
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Replaces Form No. F_061011 Rev 19.1
(Updated Approvals.)
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