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� z � <br /> S Appendix B <br /> 71 SO Overfill Valve in Tank Shut off Level Worksheet <br /> Important: This Is meant to be supplemental worksheet and not a substitute to following the installation <br /> manual Instructions. All length measurements are in inches. Please contact the Authority Having Jurisdic- . <br /> tion(AHJ)and,.revtew;local,state',aMah thational cedes toldetermine the regulatory requirements governing <br /> shut-off capacity in,your region,as used as take into account other,considerations such as extreme tank tilt. <br /> Take the following measurements with the valve in- <br /> stalled in the tank: <br /> Distance from the 71 SO inlet tube flange to the cast <br /> lug in the 71 SO body(see figures),upper tube length. <br /> Note: the Upper Tube Length must be at least 16"to in- <br /> elude the protective bend in the tube. <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (U)_ /.7J' / /?� upper r <br /> —�' ---- Tube <br /> Distance from the 71 SO inlet tube flange to the bottom <br /> of the tank. Note:If a tank bottom protector is present it <br /> may be necessary to add this thickness to dimeQon <br /> (OPW 6111&61 TP models add 0.6") I (W)Valve <br /> (B)= 136 �lt " ��d j Length, <br /> bottom of & <br /> From the tank calibration chart provided by tank manu- cUt <br /> facturer find the dipstick number(Y) which corresponds <br /> to the 1p0%volume. (B) <br /> (Y) S.._�_r�_ __ f� To Tank I ' <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve j Chart r' <br /> bottom (B) i I Length, i 100% <br /> (X) =(B)-(D)-z"= a_. t�- - -�_ i top of cut s Volume <br /> ------ <br /> Dipstick r: <br /> Using the tank calibration chart provided by the tank <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimension and the 1001/o volume(Y)tank I I #g <br /> capacity. ! <br /> 542 - sna - S'►Yd- <br /> (X)tank capacity in gallons <br /> (Y)tank capacity in gallons= /D/jL' Jvl St, IvKL <br /> SO%=(X)capacity/(Y)`capacit, x R+-"''� <br /> Note: The overfill valve must be installed per AHJ require- <br /> ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart B Section 280.0 overfill <br /> valves should be set tQ a maximum of 95%. <br /> 21 <br /> :5. <br />