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Y (, Pp Pr jo4 5/911 T3.595_00r° -T3 9I <br /> Appendix B <br /> 71 SO Overfill Valve In Tank Shut off Level Worksheet <br /> IMPottant: 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 In the 71 SO body(see figures),upper tube length. <br /> Note: the Upper Tube Length must be at feast 16"to in- <br /> clude the protective bend In the tube. <br /> (D)_ . S 1� <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tub ,yllve length. (D1 <br /> (W)_ �� � l) Upper <br /> (U)= I s'7 7/� <br /> Tube <br /> Distance from the 7150 inlet tube flange to the bottom <br /> 7` <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 &6jTP models add 0.6 ) (W)Valve <br /> an= i Length, <br /> I <br /> ottom 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%volymel I( B) <br /> (Y)= l To Tank <br /> 1. To determine shut-off percentage: M <br /> Tank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chat <br /> bottom(B) 7 l ( Length, 100% <br /> (X)_(B)-(D)-2" n 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 100%volume(Y)tank <br /> capacity. <br /> (X)tank capacity in gallons= lyq <br /> (Y)tank capacity In gallons=_ O <br /> SO%=(X)capacity/(Y)capacity x100 <br /> Note: The overfill valve must be installed per AR)require- <br /> ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- h <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 />