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Appendix 6 <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.Jt(risdit- <br /> eion(AHJ)and review local,state,and national codes to determine the regulatory requirements governing <br /> shut-off xapocity In your region,as well as take into account other considerations such as extreme tank tilt. <br /> Take the following r'rieasurements with the valve in- <br /> stalled in the tank: <br /> Distance from the 7150 inlet tube flange to the cast ^ <br /> fug in the 71 S0 body(see figures),upper tube length. <br /> Mote: the Upper Tube Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> 8 2 <br /> Distance from the 7150 inlet tube flange to the top and <br /> bottom of lower tube,valve length. (D) <br /> (W)= 18 g�� Upper <br /> (U)= ISS Y'- 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 &61TP models add 0.6") (W)Valbe <br /> D - UO Length, <br /> (�)_ bottom of <br /> From the tank calibration chart provided by tank manu- <br /> facturer find the dipstick number(Y)which corresponds (B) <br /> to the 100%volume, To Tank _ <br /> 1. To determine shut-off percentage: M Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve _. r Chart <br /> Length, ?° 100% <br /> bottom(6) =.� ,y <br /> (X) _(g)_(D)-21,_ �I 90/zl 8 2 �,� _Z•, (� / top of Cut Volume <br /> L Dipstick <br /> Using the tank calibration chart provided by the tank f <br /> manufacturer determine the tank capacity at the cal- <br /> culated(X)dimension and the 1 oe%volume(Y)tank <br /> capacity. <br /> (X)tank capacity in gallons= <br /> (Y)tank capacity in gallons= /0 Z i <br /> SO%=(X)capacity/(Y) capacity x10®= S�' <br /> Nate: The overfill valve must be installed per AHJ 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 /> 00 age the overfill valve must be removed and replaced. For <br /> J <br /> 07—+11 reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 2 <br />