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T_P_W 53VML 3 " BALL - FLOAT VENT VALVES <br /> Iseral EPA Technical Standards A&_1 <br /> Federal EPA technical standards for overfill prevention of petroleum UST's allow <br /> Wse of ball float vent valves that restrict the delivery flow when the UST is over- <br /> TIM.The EPA requirements state that this flow restriction must occur when the <br /> tank is no more than 90%full.The OPW 53VML series is designed to consistently <br /> 01dramatically reduce delivery flow rate.(See OPW 30MV to comply with EPA <br /> q W. ards for a 30 minute warning.) <br /> Iportant <br /> stalling the incorrect length OPW 53VML for your specific UST application <br /> result in delivery flow restriction at liquid levels exceeding the 90%maximum <br /> Olished by EPA.Always consult the appropriate tank charts and determine the <br /> spe ifics of your UST installation to determine the appropriate length OPW <br /> 53VML.The illustration and instructions below are intended to serve as a guide in <br /> determination. <br /> fisting <br /> sting Installation Grade Level <br /> ks buried or backfilled) <br /> • Measure distance­r,from a <br /> Mferencepoint near grade level to <br /> JV*P <br /> `Reference <br /> We top of the extractor cage bar. <br /> OPW 104A Point <br /> ♦ Using the appropriate wrench, Manhole or. <br /> Mmove the extractor cage and OPW ISpill-zej;. <br /> .4 <br /> MWisting float vent valve. (ontamer <br /> ♦ Measure distance"IF'from the sameOPW 1711 T Cap <br /> Wference point near grade level to <br /> e inside diameter or the UST Or, ON <br /> using a dipstick,determine the return <br /> stance from the reference point to <br /> ae <br /> _*:''_2*:33VM Vapor-iZV, <br /> Ite bottom of the UST,and subtract OPW 23iVor <br /> recovery/extractor fiffin <br /> the tank inside diameter. <br /> rom the correct tank chart, <br /> 4"Tank <br /> 14'etermine the distance"IV"that 4 <br /> Fitting <br /> corresponds to 10%of the total UST <br /> apacity. V <br /> Ile. <br /> ♦ <br /> OPW 53VML length(VI) 10%of total <br /> -in UST VI tank capacity <br /> vapor IV as determined <br /> -wm, Installation from appro- <br /> T, kS not buried) orifice priate fink <br /> chartWollow the same procedure above or <br /> measure and calculate dimension"W' <br /> Mom the inside diameter of the UST <br /> EW the end of a 2"npt.pipe threaded <br /> into the extractor cage.The nominal <br /> •�ght engagement of 2"pipe threads• IMPORTANT-OPW products should be used in com- <br /> ptiance with applicable federal,state and local laws <br /> ♦ OPW 53VML length(VI)=IV+V and regulations.Product selection should be based on <br /> physical specifications and limitations and compatibil- <br /> ity with the environment and material to be handled. <br /> 1-thnical Notes OPW MAKES NO WARRANTY OF FITNESS FOR Adh <br /> 111or extended manway applications, A PARTICULAR USE.All illustrations and specifica- <br /> We total length of coupling and pipe tions in this literature are based on the latest product <br /> inforination available at the time of publication.Dover/ <br /> wmTxtension for the OPW 53VML OPW reserves the right to make changes at any time in <br /> should match the length of the prices,materials,specifications and models and to dis- <br /> anway extender. continue models without notice or obligation. <br />