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Appendix 8 <br /> +�S 1 vU/ 7150 Overfill Valve in Tank Shut off level Worksheet <br /> I!p rtant. 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 R <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- t <br /> dude the protective bend in the tube. I <br /> (D)_ <br /> Distance from the 7150 inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (W)_ _ 167- :U) <br /> Upper <br /> (U) Tube <br /> Distance from the 7150 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 TP models add 0.6") I (Wl Valve <br /> Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the dipstick number rY)which corresponds <br /> to the 1006 volume. (8) <br /> (Y)_- To Tank <br /> 1. To determine shut-off percentage: (Y) <br /> Tank <br /> Subtract upper tube length(D)from distance to tank 'U)Valve Chart <br /> bottom(8) k,072Length, 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. I I <br /> (X)tank capacity in gallons= � l `1 <br /> (Y)tank capacity in gallons=_Z-0! _ <br /> 50°,b=(X)capacity/(Y)capacity xt 00 <br /> Note: The overfill valve must be installed per AH1 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 9 Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />