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At�tae�.. radix 3 <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 /> manual Instructions. All length measurements are In inches. Please contact the Authority.Maving.Jurisdk- <br /> tion(AHJ)and review local,state,and national codes to determine the regulatory requirements governing <br /> shut-off xap�city in your region,as well as take into account other considerations such as extreme tank tilt. <br /> Take the following tiieasurements with the valve in- [. <br /> stalled in the tank <br /> Distance from the 71 SO inlet tube flange to the cast y <br /> lug in the 71 SO body(see figures),upper tube length. <br /> i <br /> Note: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> Z8 <br /> Distance from the 71 SO inlet tube flange to the top and ' <br /> bottom of lower tube,valve length, (D) <br /> (W)= 10 Upper <br /> (U) _ /1 2_ Tube <br /> Distance from the 71 SO inlet tube flange to the bottom <br /> of the tank. Note; If a tank bottom protector is present it _ <br /> may be necessary to add this thickness to dimension - <br /> (OPW 6111 &61�7P models add 0,6") "X °o (W)Valve <br /> 3 ,. {� Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- <br /> facturer find the dipstick number(Y)which corresponds �.►� <br /> to the 100%volume. (B) <br /> _ g'I SS To Tank(Y) <br /> (Y) <br /> 1. To determine shut-off percentage: = Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve Chart <br /> bottom (B) Length, 100% <br /> (X)_(B) .(®)_2„= 113 �� -2= 83'�ti 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= y 8 <br /> (Y)tank capacity in gallons <br /> sO%_(X)capacity/(Y)capacity x100= /3 -�9 Note: The overfill valve must be installed per AHJ require- <br /> ments and all applicable local,state,and national codes, if <br /> o the overfill valve is set above the allowable shut-off percent- <br /> - }Q j Ott � �j .3 .2-�' �° age the overfill valve must be removed and replaced, For <br /> 1,5-s reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 2 <br />