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Technical Specifications <br />Style: Flat Concealed Pendent <br />Threads: V;' NPT or ISO 7-1 Ruiz <br />Nominal K-Factor: 2.8 (40 metric) <br />Max. Working Pressure: 175 psi (12 bar) <br />Material Specifications <br />Fusible Link: Beryllium Nickel <br />Sprinkler Body: Brass Alloy <br />Levers: Bronze Alloy <br />Yoke: Brass Alloy <br />Sealing washer: Nickel with PTFE <br />Load Screw: Bronze Alloy <br />Towers: Copper Alloy <br />Pins: Stainless Steel <br />Deflector: Bronze Alloy <br />Cup: Steel <br />Temperature Ratings <br />Ordinary <br />1659F (74°C) (Sprinkler) <br />[135°F (57°C) (Cover Plate)] <br />Intermediate <br />212°F (100°C) (Sprinkler) <br />[165°F (74°C) (Cover Plate)] <br />Sensitivity <br />(See lable B) <br />Cover Plates <br />Model G5 <br />Model G5 QR Gasket (cULus only) <br />Model G5 SR Gasket <br />Cover Plate Finishes <br />(See Table 1) <br />Sprinkler Wrench <br />Model W3 <br />Model FC <br />Listings and Approvals <br />cULus Listed (Light Hazard only) <br />FM Approved <br />Model 135-28 Sprinkler Components and Dimensions <br />Threads <br />Body <br />Cup <br />Tower <br />Fusible Link <br />Deflector (retracted) <br />Pin (extended) <br />Deflector (extended) <br />Model G5-28 Sprinkler Sensitivity <br />Ceiling <br />3/4" (19 mm) Max. <br />Cover Plate Adjustment <br />Model G4/G5 Cover Plate <br />2-5/16" <br />(58 mm) <br />Dia. <br />3-5/16" (84 mm) Dia. <br />3/16" (5 mm) <br />Ceiling <br />Cover Plate Model <br />Listing or Approval Agency <br />cULus <br />FM <br />G5 <br />OR <br />SR <br />G5 QR Gasket <br />OR <br />G5 SR Gasket <br />SR <br />SR <br />UK: Uuick-response <br />SR: Standard -response <br />Bulletin 034 Page 2 of 9 <br />April 2023 mum www.reliablesprinkler.com <br />