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Appendix B <br /> 71 SO Overfill Valve in Tank Initial Shut off Level Worksheet <br /> Important: This s 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 re iiew local,state,and national codes to determine the regulatory requirements governing <br /> shut-off capacity in your region,as well as take into account other considerations such as extreme tank tilt. <br /> Take the followin g measurements with the valve in- <br /> stalled in the tan rr <br /> Distance from the 71 SO inlet tube flange to the last C�a <br /> lug in the 71 SO b dy(see figures),upper tube length. <br /> Note: the Upper T ube Length must be at least 16"to in- S <br /> clude the protective bend in the tube. <br /> 11'4" <br /> Distance from the 71 SO inlet tube flange to the top and 4_1 <br /> bottom of lower tL be,valve length. ` r ` <br /> Upper <br /> (U)= Tube <br /> Distance from the 71 SO inlet tube flange to the bottom ----•�—�--� ' `�---- <br /> of the tank. Note: f a tank bottom protector is present it <br /> may be necessary o add this thickness to dimension <br /> (OPW 6111 &61 TP models add 0.6") (W)Valve • t` <br /> (B)_ It �i ?� N Length, <br /> i, bottom of � <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the di stick number(Y)which corresponds i V0 iJp 'l <br /> to the 100%volu e. (B) <br /> (Y)= 1©2-4 k To Tank +j <br /> j <br /> {Y} 1 <br /> 1. To determine but-off percentage: Tank ` <br /> Subtract uppertu e length (D)from distance to tank (U)Valve _ _ Chart f' <br /> bottom(B) ,, Length, 100% '! <br /> (X)=(B)-(D)-2" g'd �L 21y �Z_��(,� top of cut Volume it <br /> i <br /> 9 J(o Dipstick 1i <br /> Using the tank cal ibration chart provided by the tank <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimen slon and the 100%volume(Y)tank I a <br /> capacity. 1 ij <br /> r� <br /> (X)tank capacity i n gallons= ;' <br /> (Y)tank capacity i n gallons= ICE Z I - . ------------------ -.=-. --- ��/ <br /> SO%=(X)capacit /(Y)capacity x100= l Y-60 <br /> Note: The overfill valve must be installed per AHJ require- <br /> ments and all applicable local,state,and national codes. If <br /> x O� _ G+Y-b G the overfill valve is set above the allowable shut-off percent- <br /> �� 7 age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />