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Page 1 of 6 <br /> MICROFAST@ QUICK <br /> RESPONSE HORIZONTAL <br /> SIDEWALL SPRINKLER <br /> VK305 (K5.6) <br /> :G:: <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 /> The Viking Microfast@ Quick Response Horizontal Sidewall Sprinkler VK305 is a <br /> small thermosensitive glass bulb spray sprinkler available with various finishes and <br /> temperature ratings to meet design requirements. The special Polyester and Electroless <br /> Nickel PTFE (ENT) coatings can be used in decorative applications where colors are <br /> desired. In addition, these coatings have been investigated for installation in corrosive <br /> atmospheres and are listed/approved as corrosion resistant as indicated in Approval <br /> Charts. <br /> 2. LISTINGS AND APPROVALS <br /> c 0. os cULus Listed: Category VNIV <br /> <FM> FM Approved: Class 2020 <br /> China Approval:Approved according to China GB Standard WARNING:Cancer and Reproductive Harm- <br /> Refer to Approval Charts and Design Criteria for listing and approval requirements that must Zt www.P66Warnings.ca.gov <br /> be followed. <br /> 3. TECHNICAL DATA <br /> Specifications: <br /> Minimum Operating Pressure: 7 psi (0.5 bar) <br /> Rated to 175 psi (12 bar)water working pressure <br /> Factory tested hydrostatically to 500 psi (34.5 bar) <br /> Nominal K-Factor: 5.6 U.S. (80.6 metric*) <br /> " Metric K-factor measurement shown is when pressure is measured in Bar.When pressure is measured in <br /> kPa,divide the metric K-factor shown by 10.0. <br /> Overall Length: 2-3/4" (68 mm) <br /> Material Standards: <br /> Frame Casting: Brass UNS-C84400 or QM Brass <br /> Deflector: Copper UNS-C19500 <br /> Bulb: Glass, nominal 3 mm diameter <br /> Belleville Spring Sealing Assembly: Nickel Alloy, coated on both sides with PTFE Tape <br /> Screw: Brass UNS-C36000 <br /> Pip Cap and Insert Assembly: Copper UNS-C11000 and Stainless Steel UNS-S30400 <br /> For Polyester Coated Sprinklers: Belleville Spring-Exposed <br /> For ENT Coated Sprinklers: Belleville Spring - Exposed, Screw and Pip cap- ENT plated. <br /> Ordering Information: (Also refer to the current Viking price list.) <br /> Order Viking Microfast@ Quick Response Horizontal Sidewall Sprinkler VK305 by first adding the appropriate suffix for the sprin- <br /> kler finish and then the appropriate suffix for the temperature rating to the sprinkler base part number. <br /> Finish Suffix: Brass =A, Chrome = F, White Polyester= M-/W, Black Polyester= M-/B, and ENT= JN <br /> Temperature Suffix: 135 °F/57 °C =A, 155 °F/68 °C = B, 175 °F/79 °C = D, 200 °F/93 °C = E, and 286 °F/ 141 °C = G <br /> For example, sprinkler 12997 with a Brass finish and a 155 °F/68 °C temperature rating = Part No. 12997AB <br /> Available Finishes And Temperature Ratings: Refer to Table 1. <br /> Accessories: (Also refer to the Viking website.) <br /> Sprinkler Wrenches: <br /> A. Standard Wrench: Part No. 21475M/B (available since 2017). <br /> B. Wrench for recessed and/or wax coated sprinklers: Part No. 13655W/B** (available since 2006) <br /> **A'/2"ratchet is required (not available from Viking). <br /> Form No. F_060914 19.11.21 Rev 19.2 Replaces form F_060914 Rev. 19.1 <br /> (Revised China approval.) <br />