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Pagel of 6 <br />® QUICK RESPONSE <br />N4 I Ki ELO PENDENT <br />SPRINKLER VK377 <br />(STORAGE-DENSITY/AREA) <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 Quick Response Extra -Large Orifice Pendent Sprinkler VK377 is a <br />thermosensitive glass bulb spray sprinkler available in several different finishes <br />and temperature ratings to meet design requirements. The special Polyester and <br />Electroless Nickel PTFE (ENT) coatings can be used in decorative applications <br />where colors are desired. In addition, these coatings have been investigated for <br />installation in corrosive environments and are listed/approved as indicated in the <br />Approval Charts. <br />The extra -large orifice provides greater flows at lower pressures than standard orifice <br />or large orifice sprinklers. This feature allows reduced pipe sizing for hydraulically <br />calculated sprinkler systems, which require high densities of water. Viking Quick <br />Response Extra -Large Orifice Sprinklers may eliminate the need for a fire pump or <br />reduce the size of the pump if it is required. On existing systems, replacing large <br />orifice sprinklers with extra -large orifice sprinklers may provide the higher densities <br />required to allow an increase in the hazard classification of an occupancy. <br />Viking quick response sprinklers may be ordered and/or used as open sprinklers <br />(glass bulb and pip cap assembly removed) on deluge systems. Refer to Ordering <br />Instructions below. <br />2. LISTINGS AND APPROVALS <br />c&us cULus Listed: Category VNIV <br />FM FM Approved: Class 2009 <br />VdS VdS Approved: Certificate G413049, G413051 <br />OLPCB LPCB Approved: Certificate 096e/14 <br />Refer to the Approval Charts and Design Criteria for requirements that must be followed. <br />3. TECHNICAL DATA <br />WARNING: Cancer and Reproductive Harm- <br />www. P65Wami ngs.ca.gov <br />Specifications: <br />Available since 1993. <br />Maximum Working Pressure: 175 psi (12 bar). Factory tested hydrostatically to 500 psi (34.5 bar). <br />Thread size: See Approval Charts <br />Nominal K-factor: 11.2 U.S. (161.3 metric*) <br />Glass -bulb fluid temperature rated to -65 °F (-55 °C) <br />Overall Length: 2-5/16" (58.7 mm) <br />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. <br />Material Standards: <br />Sprinkler Frame: Brass UNS-C84400 <br />Deflector: Brass UNS-051000 <br />Bulb: Glass, nominal 3 mm diameter <br />Pip Cap and Insert Assembly: Copper UNS-Cl1000, or Leaded Bronze (UNS-C31600 or UNS-C31400) and Stainless Steel UNS-S30400 <br />Compression Screw: Brass UNS-C36000 <br />Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape <br />For Polyester Coated Sprinklers: Belleville Spring -Exposed <br />For ENT Coated Sprinklers: Belleville Spring -Exposed, Screw and Pipcap-ENT plated <br />Finishes and temperatures: <br />Finish: <br />Brass <br />Chrome <br />White Polyester <br />Black Polyester <br />ENT <br />Suffix: <br />A <br />F <br />M-/W <br />M-/B <br />JN <br />Temperature: <br />166 T (68 °C) <br />176 T (79 °C) <br />200 T (93 °C) <br />286 T (141 °C) <br />Suffix: <br />B <br />D <br />E <br />G <br />Ordering Information: (Refer to Table 1 and the current Viking List Price Book.) <br />Form No. F_030993 Rev 01 April 2023 Replaces Form No. F_030993 Rev 22.1 <br />(added venting statement(s)) <br />