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Features <br />• High Flow Capacity — The primary poppet is held out of the flow stream while <br />the secondary poppet is held normally open to minimize head loss across the <br />valve and to protect the poppet seals from damage and erosion. True 1 1/2" and <br />2" body sizes ensure maximum flow. <br />• Fire Protection —A fusible link trips the valve closed at 165° F to shut off fuel <br />supply to the dispenser. <br />• Main Poppet Seat Integral to the Top Assembly — Having the main poppet seat as <br />an integral part of the valve top assures a new, clean seating surface is installed <br />each time the top is replaced. This design also ensures that the integrity of the <br />seal between the valve top and bottom is verified during line testing and allows <br />full inspection of the main poppet when the top is removed. <br />• Reliable Shut-off — A Stainless Steel Main Spring, a Teflon -Coated Brass Packing <br />Nut, and a Copper -Nickel -Chrome Plated Brass Stem are designed to prevent tar <br />build-up and corrosion from interfering with poppet operation after long periods <br />of normal service without activation. <br />• Integral Test Port — A 3/8" Test Port allows the piping system to be air tested <br />without breaking any piping connections. <br />• Patented Thermal Relief Valve — Relieves excessive pressure build-up caused by <br />thermal expansion of fuel in the dispenser piping system in the event of fire <br />(double -poppet models only). <br />• Low -Profile Tops — Female and Union -top double -poppet valves have a low - <br />profile top to allow upgrading from OPW single -poppet valves without changing <br />existing piping. <br />• Multiple Mounting Options — Valves are boss -mounted to stabilizer bars in sumps <br />and pans or mounted to bars embedded in the island with optional U -Bolt kits <br />IOUBK-015 (not included). Versatile Combination Body (boss mount/U-Bolt <br />mount) models are available to accommodate most mounting applications with <br />one valve style. <br />• Underwriters Laboratories — Listed for use with gasoline and 85% and 100% <br />methanol. All OPW 10 Emergency Shut -Off Valves meet requirements of UL <br />STANDARD 842. <br />• Duragard®-Coat Finish — Provides superior corrosion resistance. <br />Materials <br />Top: cast iron* <br />Body: cast iron* <br />Disc: M-19 <br />Carrier: zinc plated steel <br />Stem: copper -nickel -chrome plated brass <br />Poppet spring: stainless steel <br />Seal: M-19 O -rine <br />