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�� <br /> 5� �� t V) 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 /> stalled In the tank: <br /> Distance from the 71 SO inlet tube flange to the cast <br /> lug its the 71 SO body(see figures),upper tube length. <br /> Note- the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend In the tube- <br /> (D) <br /> Distance from the 7150'niet tube flange to the top and <br /> bottom or lower tube,valve length. <br /> (W)= Z (Da <br /> {U} Upper <br /> Tube <br /> Distance from the 7150 inlet tube flange to the bottom <br /> of the tank. Note:If a tank bottom protector is present--t <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61TP models add 0.6") (Wi 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)_ (C 1 0 To Tank <br /> 1. To determine shut-off percentage: (Y)ank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart <br /> bottom(B) Length, 10pgo <br /> (X)_(B)—(D)-2"= Z top of cut Volume <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 1 11D%volume(Y)tank <br /> capacity. <br /> (X)tank capacity in gallons= <br /> (Y)tank capacity in gallons= t <br /> SO%_(X) capacity I(Y)capacity x1Qo <br /> Note: The overfill valve must be irstalled per AHJ require- <br /> ments and all applicable 1cca!, state and naticnal codes If <br /> the overfill valve is set above the a lowabie strut-off percent- <br /> age the ove-fill valve must be removed and �eplaced. Fcr <br /> re`erence 40 CFR part 280 Subpart B Section 280 20.avE~f1! <br /> valves 5houid be set tc a max muYr• of 95"t <br />