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71 SO Overfill Valve in Tank Shut off Level Worksheet <br /> j Qrtant; 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,Nying Jtirlsdk- <br /> tion (AHJ)and review local,state,and national codes to determine the regulatory requirements governing <br /> shut-off,capocity in your region,as well as take into account other considerations such as extreme flank tilt. <br /> Take the followlrig ri3easurements with the valve in- (. <br /> stalled in the tank: <br /> ®istancefrom 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) <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length, (p) <br /> (1N)_ $L '/B�t Upper <br /> Tube <br /> Distance from the 71 SO inlet tube flange to the bottomof the tank. Note;If a tank bottom protector is present it <br /> may be necessary to add this thickness to dimension �?- <br /> (OPW 6111 &61TP models add 0,6") ri ( Va I've <br /> Length,= <br /> 01 bottom of - <br /> 00 <br /> From the tank calibration chart provided by tank manu- _ cut <br /> facturer find the dipstick number(Y)which corresponds o0 <br /> to the 100%volume. (6) <br /> To Tank <br /> (Y) <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve _.._ NQ Chart <br /> bottom{8) Length, oa 100% <br /> (X)_ m —(®)-���_ � �� — 8 Z 2_l�S %y 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 100%volume(Y)tank <br /> capacity. <br /> (X)tank capacity in gallons= r �- <br /> (Y)tank capacity in gallons <br /> SO%_()Q capacity/(Y)capacity x10®= q Y 6 _ <br /> Note: The overfill valve must be Installed per AHJ require- <br /> ments and all applicable local,state,and national codes, if <br /> 1 )6S x/D O 9 c� 6 the overfill valve is set above the allowable shut-off percent- <br /> 9 O� age the overfill valve must be removed and replaced. For <br /> reference 40 CFR part 280 Subpart 8 Section 280,20 overfill <br /> valves should be set to a maximum of 95%, <br /> 2 <br />