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Appendix 8 <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 /> ma idai riffs riRti6ns. All eng measurements ar n-jnc%i , 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 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)= 5 q,3/6 <br /> Distance from the 71 SO Inlet tube flange to the top and <br /> bottom off?Dertube,valve length. (R) <br /> (ilii)_ <br /> (U) Upper <br /> Tube <br /> Distance from the 71 SO Inlet tube flan a the bottom <br /> of the tank. Note:if a tank bo rote or is present it <br /> may be necessary to add this thickness to dimension <br /> (OPW 6111 &61TP models add 0.6") <br /> (B)= 132 Le_ ( 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 /> I. To determine shut-off percentage: (Y) <br /> Subtract upper tube length(D)from distance to tank <br /> (U)Valve Tank <br /> bottom(B) , Length, Chart <br /> (K)=(B)-(D)-2"_ l a t 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 M dimension and the 100%volume(Y}tank � <br /> capacity.- <br /> " <br /> (X)tank capacity in gallons= <br /> (Y)tank capacity In gallons <br /> SO%=(X)capacity/(Y)capacity x100 <br /> Note: The overfill valve must be installed per ARJ 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 muss be removed and replaced. For <br /> reference 90 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum ofgs%. <br /> 21 <br />