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otjx ARpendix fl <br /> 71 SO Overfill Valve in Tank Shut off Level Worksheet <br /> IImbortsM This Is meant to be supplemental worksheet and not a substitute to following the installation <br /> manna l"instruttl6hi. All ten§th measurements are finch—es. 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 /> stalled In the tank: <br /> Distance from the 71 SO Inlet tube flange to the cast <br /> lug in the 71SO body(see figures),upper tube length. <br /> Note: the UpperTube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> (D)_— <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of ower, be,valve length. <br /> (W)= 3 (D) <br /> (U)=-..-. IM) Upper <br /> t Tube <br /> Distance from the 7150 Inlet tube flan a the bottom <br /> of the tank. Note:If a tank bo rate or is present It <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111&61TP models add 0.6") (M 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. (8} <br /> (Y)= To Tank <br /> 1. To determine shut-off percentage: (Y) <br /> Subtract upper tube length(D)from distance to tank 'lank <br /> bottom{g} {U)Valve Chart <br /> + Length, <br /> (X)_(B)-(D)-2"_ ! top of cut 100% <br /> rn <br /> Votume <br /> Dipstick <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 /> (X)tank capacity in gallons= U �- <br /> (Y)tank capacity in gallons= <br /> SO%=(X)capacity1(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 /> 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 9sw <br /> 21 <br />