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y <br /> 211111111 1 <br /> 0 P W 53VBA FLOAT VENT A L V E S <br /> t. <br /> 4. <br /> 1 <br /> Federal EPA Technical Standards <br /> Federal EPA technical standards for overfill prevention of petroleum UST's allow <br /> the use of ball float vent valves that restrict the delivery flow when the UST is over- <br /> filled.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 /> and dramatically reduce delivery flow rate. (See OPW 30MV to comply with EPA <br /> standards for a 30 minute warning.) <br /> Important <br /> Installing the incorrect length OPW 53VML for your specific UST application <br /> may result in delivery flow restriction at liquid levels exceeding the 90% maximum <br /> established by EPA.Always consult the appropriate tank charts and determine the <br /> specifics 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 /> this determination. <br /> Existing Installation Grade level <br /> (Tanks buried or backfilled) <br /> *Measure distance"I"from a <br /> reference point near grade level to <br /> the top of the extractor cage bar. V:o.:a <br /> + Usingappropriate OPW 104A a Q ' Q Reference <br /> thePP Priate wrench °� ��° Do° Paint <br /> remove the extractor cage and Manfiole or `�o3 ac ;; a:e6 apo p o <br /> OP41 1 spill i..�..a a-.. q a �.eo :•°e_8•'.: fl... ac �.?i �s•' �:q'e ndL <br /> existingfloat vent valve. <br /> .b <br /> Container <br /> " f. � o0=on ova d •• .O.C`.p? Co:O ;d.0��Pi� '! A c t?'� <br /> ♦Measure distance II from the same : 0.p.; 00:�:e 0. <br /> reference point near grade level to OPW 1711T Cap - b: <br /> p•° - �so:p:. :Q-: (1O QO:ol: o :Q. o. OC <br /> $.o 0 4 oe, O• •o��.e :°•.O,�.- <br /> 'n. o'.. <br /> the inside diameter of the UST.Or, Q a' : 4 ,o: ,�o� •a o: b o .'� <br /> a 0PW 1611AV va ar ° �°. °4 :dao.• <br /> g P return fitting pd� oa'4 <br /> using a dipstick,deter-mine the �.• so q� ° <br /> • fes.•-'�j.n•_•7."!.:'ll•w.'0 � <br /> • v� <br /> distance from the referenceDint to .o° :�• g.� . o 0 <br /> P 4 a•o4o. $.o:.. �s;: <br /> the bottom of the UST,and subtract OPW o <br /> recovery/extractor-Vapors .p yo °° ��� °A`�°Q° 0` <br /> the tank inside diameter. y/ 9 <br /> d:o::to-•'PF9e.-o .,. a •p: . �•' 0: q••..i <br /> From the correct tank chart,determineg„, <br /> the distance"N4 Tank Bun <br /> 'that corresponds to , <br /> Fitting ,.• 0 1e <br /> 10%of the total UST capacity. ..a�. •u�;�;a a c III,:° •;�•F,;;:-•� a:o. <br /> �° °.Q'o ° r. °. • Qa �°a <br /> ♦ <br /> OPW <br /> ��53VML length(VI)=II+IV- ;o� o q�°` �Y..a <br /> I-til � ,...•?;•d �'a•° . `n•-°_, <br /> tea. 3 -�a•. ,.o.. <br /> IIST;. VI :<10%of total <br /> d <br /> New Installation d° <br /> a tank capacity <br /> as determined <br /> (Tanks not buried) ''/B"vapor ly from appro- <br /> arifice priate tank <br /> ♦Follow the same procedure above or chart <br /> measure and calculate dimension <br /> "V"from the inside diameter of the <br /> UST to the end of a 2"npt.pipe <br /> threaded into the extractor cage.The <br /> nominal tight engagement of 2" pipe <br /> threads is%". <br /> ♦OPW 53VML length(VI) =IV+V <br /> Technical Notes <br /> s For extended manway applications, <br /> the total length of coupling and pipe <br /> extension for the OPW 53VML <br /> should match the length of the <br /> m�anway extender. <br /> . .� <br />