Viking FREEDOM VK4660 Technical Data Manual

Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com.
1. DESCRIPTION
Viking Freedom Residential Pendent Lead Free* Sprinkler VK4660 is a thermo-
®
sensitive, glass-bulb residential sprinkler available in several different finishes and
temperature ratings to meet varying design requirements. The orifice design, with
a K-Factor of 5.2 (74.9 metric
the hydraulically designed fire-protection system. The glass bulb operating element
and special deflector characteristics meet the challenges of residential sprinkler
standards.
* Lead content complies with the definition of 'Lead Free' established in the Reduction of Lead
in Drinking Water Act (S.3874) endorsed by AWWA's Water Utility Council, and California
Assembly Bill #1953.
2. LISTINGS AND APPROVALS
UL Listed (C-UL-US-EU): Category VKKW
UL Classified to: NSF/ANSI Standard 61, Drinking Water System
Components and NSF 372 (MH48034).
Refer to the Approval Chart and Design Criteria for C-UL-US-EU Listing requirements
that must be followed.
3. TECHNICAL DATA
Specifications:
Available since 2011.
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: 5.2 U.S. (74.9 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)
Material Standards:
Frame Casting: Brass UNS-C89833
Deflector: Phosphor Bronze UNS-C51000
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: Brass UNS-C64200
Ordering Information: (Refer to the current Viking price list.)
Sprinkler: Base Part No. 16875
Order Sprinkler VK4660 by first adding the appropriate suffix for the sprinkler finish and then the appropriate suffix for the tempera-
ture rating to the sprinkler base part number.
Finish Suffix: Brass = A, Chrome = F, White Polyester = M-/W, and Black Polyester = M-/B
Temperature Suffix (°F/°C): 155°/68° = B, 175°/79° = D
For example, sprinkler VK4660 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 16875AB.
Available Finishes And Temperature Ratings: Refer to Table 1.
Accessories: (Also refer to the Viking website.)
Sprinkler Wrenches:
A. Standard Wrench: Part No. 21475M/B (available since 2017)
B. Wrench for recessed sprinklers: Part No. 13655W/B** (available since 2006)
NOTE: RECESSED PENDENT SPRINKLERS WITH PROTECTIVE CAPS MUST USE WRENCH 13655W/B.
**A ½" ratchet is required (not available from Viking).
Form No. F_012611 09.17.21
TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
), allows efficient use of available water supplies for
†
)
†
Rev 21.1
FREEDOM RESIDENTIAL
®
PENDENT LEAD FREE
SPRINKLER VK4660 (K5.2)
Replaces Form No. F_012611 Rev 17.1.P65
(Removed F-1 Escutcheon.)
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