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ARpendix B } <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 Having Jurisdic- <br /> tion(AM 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 UpperTube Length must be at least 16"to in- <br /> clude the protecW' bend In the tube. <br /> (D)_ f22VI�1% a j <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of�rtube,valve length. (D) <br /> (VV) <br /> (V),� � �2 Upper <br /> Tube <br /> Distance from the 71SO 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 111 &61TP models add 0.6") (M Valve <br /> Length <br /> bottom of <br /> From thetank calibration chart provided by tank manu- cut <br /> facturer find the dipstick number(Y)which corresponds <br /> to the 100%volume. i8) <br /> 'k To Tank <br /> 1. To determine shut-off percentage: (Y)Tank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart <br /> bottom(B) Length, 100% <br /> (X)=(B)—(D)-2"= 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= <br /> (Y)tank capacity in gallons= <br /> 5096={X)rapacity/(Y)capacity x100 � <br /> Note: The overfill valve must be installed per Al U 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 95%. <br /> 21 <br />