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models available for both AST and US lications. <br />Download Specification Sheet.pdf <br />View Video of the Diffuser in Action (MPEG File) <br />View Video of the Diffuser in Action (Real Player) <br />,7 x <br />Emergency Vents and Vent Fittings—FIG 244 Series <br />Emergency Vent (pressure relief only) used on aboveground storage tanks, as a <br />code requirement, to help prevent the tank from becoming over -pressurized and <br />rupturing if exposed to fire. Series also contains flanged adaptor, companion flange, <br />and pipe nipple fittings. <br />Download Specification Sheets <br />New 2" Design Brass & Aluminum 244 <br />2", 3" and 4" Fig. 244 <br />6" Fib 244 <br />8" and 10" Fia, 244 <br />Pressure/Vacuum Vent—FIG 749 Series <br />Vent valve used on underground and low volume aboveground tanks for motor fueling. Vent allows tank to <br />"breathe" during filling and dispensing operations. Poppets seal vapors in the tank when pressure is <br />equalized. <br />Download Specification Sheet.pdf <br />Pressure/Vacuum Vent With Gauge Hatch—FIG 548 Series <br />For normal venting of aboveground storage tanks. Allows tank to "breathe" during filing and withdrawing <br />operations. Pressure/vacuum poppets seal vapors in the tank when pressure is equalized. This vent must <br />be used in conjunction with an emergency vent and it is recommended that the opening pressure setting is <br />set below that of the emergency vent so the normal vent relieves first. <br />Download Specification Sheet.pdf <br />PressureNacuum Vent—FIG 748 Series <br />For normal venting of aboveground storage tanks. Allows tank to "breathe" during filing and withdrawing operations. Pressure/vacuum poppets seal vapors in the tank when pressure is equalized. This vent must <br />be used in conjunction with an emergency vent and it is recommended that the opening pressure setting is set below that of the emergency vent so the normal vent relieves first. <br />Download Specification Sheet.pdf <br />Combination Vent/Overfill Alarm—FIG 922 <br />This innovative product is for use on aboveground storage tanks and combines a <br />pressure/vacuum vent and overfill alarm all in one unit. <br />Download Specification Sheet.pdf <br />Double Outlet Vent—FIG 155 Series <br />Aluminum T -style Vent used primarily on small fuel oil storage tanks. Outlet ports on either side of the inlet <br />with 20 mesh stainless steel screen keeps debris out of the airway. iw <br />