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351S <br />Flame Arrester <br />Used in conjunction with a <br />"normal" vent on above- <br />ground storage tanks. <br />Open (non -pressure type) <br />flame arrester to help <br />prevent the transmission <br />of heat and/or an ignition <br />source into the tank. <br />2" NPT 31.0 lbs <br />Fig. 351 S <br />Construction Details Standard Features <br />Body... cast iron 1. Gauge opening cap. <br />Cover ... cast iron 2. Vapor relief capacity at 2.5 <br />Cap ... brass PSI = 22,OW CFH <br />Arrester Plates...stainless steel <br />Restrictions and Warning <br />1. Do not use with acetylene, carbon disulfide, etheleneoxide <br />or hydrogen gases. For use with normal hydrocarbon flames <br />such as gasoline in air. <br />2. Routine inspection is required to ensure airways are clear and <br />free of debris. Blocked airways can cause structural deforma- <br />tion of the tank. <br />Flame Arrester <br />With 748A Vent ... used in <br />conjunction with a Fig. 748A <br />pressure/vacuum vent on <br />aboveground storage tanks. <br />Pressure type flame arrester <br />to help prevent the transmis- <br />sion of heat and/or an <br />ignition source into the tank. <br />Fig. 748A ... same vent <br />featured in pressure/vacuum <br />vent section. <br />Construction Details <br />ED <br />DEC 0 5 2u,17 <br />RONAIEV'"1;1L 111;1 .• <br />RiT,11l:n 1 1 111 <br />Fig. 351 S w/748A <br />Fig.351S... Flame arrester <br />Fig. 748A ... Pressure/vacuum vent <br />Fig. 748 <br />Venting <br />Pressure <br />Vacuum <br />Ship <br />Capacity <br />Size Setting <br />Setting <br />Weight <br />(CFH) <br />(oz/sq in) <br />(oz/sq in) <br />(lbs) <br />(@2.5 PSI) <br />2" 2.0 <br />1.0 <br />42.00 <br />15,500 <br />4.0 <br />1.0 <br />42.50 <br />15,500 <br />6.0 <br />1.0 <br />42.75 <br />15,500 <br />8.0 <br />1.0 <br />43.50 <br />15,500 <br />12.0 <br />1.0 <br />44.50 <br />13,000 <br />16.0 <br />1.0 <br />45.75 <br />13,000 <br />354 <br />Updraft Vent <br />"Open" vent used on under- <br />ground and aboveground <br />tanks for motor fueling. Vent <br />allows tank to "breathe" <br />during filling/dispensing <br />operations. <br />Construction Details <br />Body ... aluminum <br />Cap ... aluminum <br />Screen ... 40 mesh brass <br />Size <br />(slip-on) <br />114,,• <br />2"" <br />4" <br />Fig. 354 <br />Ship <br />Weight <br />(lbs) <br />0.75 <br />0.75 <br />1.50 <br />2.25 <br />Double <br />Outlet Vent <br />Aluminum T -style <br />vent used primarily o <br />small fuel oil storage Fig. 155S <br />tanks. Outlet ports on <br />either side of the inlet with 20 mesh stainless <br />steel screen keeps debris out of the airway. <br />Venting Fig. 155... threaded (NPT) <br />Capacity . Fig. 155BSP... 2" with British Pipe Threads(CFH) <br />27 650 Fig. 155S ... slip-on w/set screw <br />27,650 <br />59,000 <br />116,900 r"FINK"P M, <br />.25 lbs <br />V .50 lbs <br />1'/." .50 lbs <br />1 W, .75 lbs <br />2" 1.0 Itis <br />3" 2.5 lbs <br />Page 22 U Morrison Bros. Co. 800.553.4840 <br />