3003 W CASINO RD BLDG 40-53 2025-12-01

January 17, 2014 Sprinkler 123a C ESFR PENDENT SPRINKLER NIKJNG* VK503 (K16.8) 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 1. DESCRIPTION Viking Early Suppression Fast Response (ESFR) Pendent Sprinkler VK503 is a fast response fusible element type sprinkler designed for early fire suppression. With a 16.8 (242 metric*) nominal K-Factor and special deflector, this sprinkler produces large, high-momentum water droplets in a hemispheric pattern below the deflector. goo This permits penetration of the fire plume and direct wetting of the burning fuel surface while cooling the atmosphere early in the development of a high-challenge fire. A Viking Sprinkler VK503 may be used in the protection of ordinary types of storage. However, it is primarily intended to protect the following types of storage, which tend to produce severe-challenge fires: palletized and solid pile storage and single, dou- ble, multiple row, and portable open rack storage (no open-top containers or solid shelves). Viking ESFR Pendent Sprinkler VK503 provides protection of most common storage materials, including: --Encapsulated or unencapsulated Class I, II, III, and IV commodities*. --Cartoned and uncartoned unexpanded plastics*. --Cartoned expanded plastics*. "Refer the Approval Charts and Design Criteria on pages 123c-e for cULus Listing and FM Approval requirements that must be followed. In addition, some storage arrangements of rolled paper, aerosols, and rubber tires may be protected by Viking ESFR Pendent Sprinkler VK503. 2. LISTINGS AND APPROVALS c@os cULus Listed: Category VNWH Successfully meets new UL 1767 test standard and compliance program for ESFR sprinklers installed in rack storage with high clearances to ceiling (20 ft or greater) FM FM Approved: Class 2027 NYC Approved: MEA 89-92-E, Volume 41 Refer to Approval Chart 1 and Design Criteria on pages 123c-d for cULus Listing requirements, and refer to Approval Chart 2 and Design Criteria on page 123d for FM Approval requirements that must be followed. 3. TECHNICAL DATA Specifications: Available since 2007. Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar). Thread size: 3/4" NPT or 20 mm BSP Nominal K-Factor: 16.8 U.S. (242 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. Overall Length: 2-7/8" (73 mm) Deflector Diameter: 1-3/4" (44.5 mm) Covered by one or more of the following patents: US5,829,532;US6,059,044;US6,336,509;US6,502,643;US6,868,917;AU722593;GB2336777 Material Standards: Frame Casting: Brass UNS-C84400 Deflector: Phosphor Bronze UNS-051000 Viking Technical Data may be found on Seat and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS- S30400 The Viking Corporation's Web site at Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with http://www.vikinggroupinc.com. Teflon Tape The Web site may include a more recent Compression Screw: Stainless Steel UNS-S31603 edition of this Technical Data Page. Trigger and Support: Stainless Steel UNS-S31600 Fusible Element Assembly: Beryllium Nickel, coated with black acrylic paint. Ordering Information: (Also refer to the current Viking price list.) Order ESFR Pendent K16.8 Sprinkler VK503 by first adding the appropriate suffix for the sprinkler finish and then the appropriate suffix for the temperature rating to sprinkler base part number. Form No. F 120106 Replaces page 123a-f, dated September 9, 2011. (UL 1767 Note.)