8530 EVERGREEN WAY 2022 2025-09-26

Page 1 of 5 p FREEDOM° RESIDENTIAL 0 . CONCEALED PENDENT SPRINKLER VK494 (K4.9) The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058 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. 1. DESCRIPTION Viking Freedom® Residential Concealed Pendent Sprinkler VK494 is a small thermosensitive,glass-bulb residential sprinkler designed for installation on concealed pipe systems where the appearance of a smooth ceiling is desired.The orifice design, with a K-Factor of 4.9(70.6 metric') allows the sprinkler's efficient use of available water supplies for the hydraulically designed fire-protection system. The fast response glass bulb operating element and special deflector characteristics meet the challenges of residential sprinkler standards. The sprinkler is pre-assembled with a threaded adapter for installation with a low-profile small-diameter cover assembly installed flush to the ceiling. The two- piece design allows installation and testing of the sprinkler prior to installation of the cover plate. The "push-on", "thread-off design of the concealed cover plate assembly allows easy installation of the cover plate after the system has been tested and the ceiling finish has been applied, while also providing up to '/2" (13 mm) of vertical adjustment. The cover assembly can be removed and reinstalled, allowing temporary removal of ceiling panels without taking the sprinkler system out of service or removing the sprinkler. The Electroless Nickel PTFE (ENT) coating has been investigated for installation in corrosive atmospheres and is C-UL-US-EU Listed as corrosion resistant as indicated in the Approval Charts.The ENT finish is l only available for the sprinkler assembly, the cover plate is not plated. I 2. LISTINGS AND APPROVALS c 9L us UL Listed (C-UL-US-EU): Category VKKW eo Refer to the Approval Charts and Design Criteria on for C-UL-US-EU Listing requirements that must be followed. 3. TECHNICAL DATA Specifications: 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: 4.9 U.S. (70.6 metric') Glass-bulb fluid temperature rated to-65 OF (-55 °C) *Metric K-factor measurement shown is in Bar.When pressure is measured in kPa,divide the metric K-factor shown by 10.0. Material Standards: Sprinkler Body: Brass UNS-C84400 or QM Brass Deflector: Phosphor Bronze UNS-051000 Deflector Pins: Stainless Steel UNS-S30200 Button: Brass UNS-C36000 Pip Cap and Insert Assembly: Copper UNS-C11000 and SS UNS-S30400 Compression Screw: 18-8 Stainless Steel Yoke: UNS-S43000 Stainless Steel Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape Cover Adapter: Cold Rolled Steel UNS-G10080, Finish: Clear Chromate over Zinc Plating Shipping Cap: Polyethylene Cover Plate Materials: Cover Plate Assembly: Copper UNS-C11000 and Brass UNS-C26800 Spring: Beryllium Nickel Solder: Eutectic Ordering Information: (Also refer to the current Viking price list.) Viking Freedom®Residential Concealed Pendent Sprinkler VK494 and Cover Plate Assembly must be ordered separately: Sprinkler: Order Sprinkler VK494 by first adding the appropriate suffix for the sprinkler finish and then the appropriate suffix for the temperature rating to the sprinkler base part number. Finish Suffix: Brass=A and ENT=JN Temperature Suffix: 155 OF (68 °C)= B, 175 OF (79 °C) = D, 200 OF (93 °C) = E For example, sprinkler VK494 with a Brass finish and a 200 OF (93 °C)temperature rating = Part No. 20759AE. Cover Plate Assembly: Base Part No. 13504(2-3/4"diameter), Base Part No. 13642 (3-5/16"diameter), or Base Part No. 15394 (square cover plate, 3-5/16" diameter) Form No. F 012116 16.06.27 Rev 16.1 (New product, new page)