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Page 1 of 5 <br /> NIKING® FREEDOM° RESIDENTIAL <br /> TECHNICAL DATA CONCEALED PENDENT <br /> SPRINKLER VK494 (K4.9) <br /> The Viking Corporation,210 N Industrial Park Drive, Hastings MI 49058 <br /> Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email:techsvcs@vikingcorp.com <br /> Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com <br /> 1. DESCRIPTION <br /> Viking Freedom® Residential Concealed Pendent Sprinkler VK494 is a small <br /> thermosensitive, glass-bulb residential sprinkler designed for installation on <br /> concealed pipe systems where the appearance of a smooth ceiling is desired. The % __ <br /> orifice design, with a K-Factor of 4.9 (70.6 metric*), allows the sprinkler's efficient <br /> use of available water supplies for the hydraulically designed fire-protection <br /> system. The fast response glass bulb operating element and special deflector <br /> characteristics meet the challenges of residential sprinkler standards. <br /> The sprinkler is pre-assembled with a threaded adapter for installation with a <br /> low-profile small-diameter cover assembly installed flush to the ceiling. The two- <br /> .w.. <br /> piece design allows installation and testing of the sprinkler prior to installation ( -... <br /> of the cover plate. The "push-on", "thread-off' design of the concealed cover . °'�"� <br /> plate assembly allows easy installation of the cover plate after the system has d <br /> been tested and the ceiling finish has been applied, while also providing up to <br /> 1/2" (13 mm) of vertical adjustment. The cover assembly can be removed <br /> and reinstalled, allowing temporary removal of ceiling panels without taking <br /> the sprinkler system out of service or removing the sprinkler. The Electroless <br /> Nickel PTFE (ENT) coating has been investigated for installation in corrosive <br /> atmospheres and is C-UL-US-EU Listed as corrosion resistant as indicated in the <br /> Approval Charts. The ENT finish is only available for the sprinkler assembly, the if i <br /> cover plate is not plated. <br /> 2. LISTINGS AND APPROVALS <br /> c 4L us UL Listed (C-UL-US-EU): Category VKKW <br /> Ea Refer to the Approval Charts and Design Criteria on for C-UL-US-EU Listing n WARNING:Cancer and Reproductive Harm- <br /> requirements that must be followed. www.P65Wamings.ca.gov <br /> 3. TECHNICAL DATA <br /> Specifications: <br /> Minimum Operating Pressure: Refer to the Approval Chart. <br /> Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to <br /> 500 psi (34.5 bar). <br /> Thread size: 1/2" (15 mm) NPT <br /> Nominal K-Factor: 4.9 U.S. (70.6 metric*) <br /> Glass-bulb fluid temperature rated to-65°F (-55°C) <br /> * Metric K-factor measurement shown is in Bar.When pressure is measured in kPa, divide the <br /> metric K-factor shown by 10.0. <br /> Material Standards: <br /> Sprinkler Body: Brass UNS-C84400 or QM Brass <br /> Deflector: Phosphor Bronze UNS-051000 <br /> Deflector Pins: Stainless Steel UNS-S30200 <br /> Button: Brass UNS-C36000 <br /> Pip Cap and Insert Assembly: Copper UNS-C11000 and SS UNS-S30400 <br /> Compression Screw: 18-8 Stainless Steel <br /> Yoke: UNS-S43000 Stainless Steel or Phosphor Bronze UNS-051000 <br /> Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape <br /> Cover Adapter: Cold Rolled Steel UNS-G10080, Finish: Clear Chromate over Zinc Plating <br /> Shipping Cap: Polyethylene <br /> Cover Plate Materials: <br /> Cover Plate Assembly: Copper UNS-C11000 and Brass UNS-C26800 or Stainless Steel UNS-S30400 <br /> Spring: Beryllium Nickel <br /> Solder: Eutectic <br /> Ordering Information: (Also refer to the current Viking price list.) <br /> Viking Freedom®Residential Concealed Pendent Sprinkler VK494 and Cover Plate Assembly must be ordered separately: <br /> Sprinkler: Order Sprinkler VK494 by first adding the appropriate suffix for the sprinkler finish and then the appropriate suffix for the <br /> temperature rating to the sprinkler base part number. <br /> Finish Suffix: Brass=A and ENT=JN <br /> Temperature Suffix: 155 °F (68 °C) = B, 200°F (93°C) = E <br /> For example, sprinkler VK494 with a Brass finish and a 200 °F (93 °C)temperature rating = Part No. 20759AE. <br /> Standard Cover Plates: Base Part No. 13504 (2-3/4" diameter), Base Part No. 13642 (3-5/16"diameter), <br /> or Base Part No. 15394(square cover plate, 3-5/16") <br /> Stainless Steel Cover Plates (not availble with any finish or paint): Base Part No. 21876 (2-3/4" diameter)or Base Part No. <br /> 21875(3-5/16"diameter). <br /> Form No. F_012116 18.10.11 Rev 18.1.P65 Replaces Form No. F_012116 Rev 18.1 <br /> (Added P65 Warning.) <br />