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Appendix B <br /> 71 SO Overfill Valve in Tank Initial Shut off Level Worksheet <br /> Important: This is meant to be supplemental worksheet and not a substitute to following the installation <br /> manual instructio s. All length measurements are in inches. Please contact the Authority Having Jurisdic- <br /> tion (AHJ)and rev ew local,state,and national codes to determine the regulatory requirements governing <br /> shut-off capacity i i 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 /> stalled in the tank <br /> Distance from.the 71 SO inlet tube flange to the last <br /> g ' <br /> lug in the 71 SO bo dy(see figures),upper tube length. <br /> Note: the Upper TL be Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> / ' <br /> 1D)_ `f <br /> Distance from the 1 SO inlet tube flange to the top and <br /> bottom of lower toe,valve length. V k <br /> (W)= l ` cD) <br /> (U)_ �- 3� '' Upper <br /> Tube <br /> Distance from the 1 SO inlet tube flange to the bottom <br /> of the tank. Note: Ii a tank bottom protector is present it i <br /> may be necessary t add this thickness to dimension I �, <br /> (OPW 61 1 1 &61TP odels add 0.6") c I q, (W)Valve A <br /> (B)= 8 G Length, <br /> bottom of <br /> From the tank caft ration chart provided by tank manu- j cut <br /> facturer find the dipstick number(Y)which corresponds tt•, '; <br /> to the 100%volume. (B) �� ++ <br /> (Y)_ I I 3/ To Tank I �i <br /> 1. To determine but-off percentage: Tank <br /> Subtract upper to e length (D)from distance to tank i (U)Valve _ M Chart <br /> bottom (B) S4 Length, 100% �I <br /> (X)=(B)-(D)-2" �_ga�•-COY, - 2 - �oY top of cut ` Volume ' <br /> I/ 150 Dipstick <br /> Using the tank ca ibration chart provided by the tank <br /> manufacturer de rmine the tank capacity at the cal- i <br /> culated (X)dimension and the 100%volume(Y)tank <br /> capacity. <br /> r <br /> (X)tank capacity 1 n gallons= <br /> Y tank capacity n gallons= <br /> 50%_(X)capaci y/(Y)capacity x100 <br /> Note: The overfill valve must be installed per AHJ require- <br /> ments and all applicable local,state,and national codes. If <br /> 0the overfill valve is set above the allowable shut-off percent- <br /> /D O g YY age the overfill valve must be removed and replaced. For <br /> 1�S reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />