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i <br /> • I <br /> Appendix B <br /> i <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 review 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 following measurements with the valve in- <br /> s Iled in the tank: <br /> Dis\pro <br /> 71 SO inlet tube fla a to the cast <br /> lugdy(see figures), per tube length. j <br /> Nobe Length mu e at least 16"to in- <br /> clubend in th ube. <br /> (D) <br /> Distance from the 71 nlet tube flange'to the top and <br /> bottom of lower tub ,va e length, (D) <br /> (W)= <br /> Upper i <br /> (U)= Tube <br /> Distance om the 71 SO inlet tube fla a to the bottom <br /> of the nk. Note:If a tank bottom prot for is present it <br /> may e necessary to add this thickness to ension <br /> ( <br /> W61 11 &61TP models add 0.6") 7 (W)Valve <br /> 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 100%volume. (B) <br /> (Y)_ '/� To Tank <br /> M <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart <br /> bottom(B) Length, 100% <br /> (X)_(B)-(D)-2"_ CS-,/+ ~n 4)y C'�af o top of cut Volume <br /> l <br /> Dipstick <br /> i <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 100%volume(Y)tank <br /> capacity. <br /> �� <br /> (X)tank capacity in gallons= `94Z� <br /> (Y)tank capacity in gallons= °�04 <br /> a � <br /> SO%_(X)capacity/(Y)capacity x100= ��5 ��' <br /> Note: The overfill valve must be installed per AM require- <br /> ments and all applicable local,state,and national codes. If <br /> i <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 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> i <br /> 21 <br />