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a�T <br />Appendix 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 (AHJ) and review local, state, and national codes to determine the regulatory requirernents 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 7150 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 least 15" to in- <br />clude the protective bend in the tube, <br />(p) = 65 . �_S <br />Distanre from the 71 SO inlet tube flange to the tap and <br />bottorn of lover tube, valve le„gii�. <br />(W) <br />Distance from the 71 SO inlet tune flange to the bottom <br />of the tank. Nate: if a tank bottom protector is present it <br />may be necessary to add this thickness to dimensian <br />(OPW 6111 & 6 1 T P models add 4.6") <br />(B) <br />From the tank calibration chart provided by tank manu- <br />facturer Find the dipstick number (Y) which corresponds <br />to the 100% volume. <br />(Y) _ A�_" <br />1. To determine shut-off percentage; <br />Subtract upper tube length (D) from distance to tank <br />bottom (B) <br />(x) = (13) -- (D) - 7" • 1� 5 <br />Using the tank calibration chart provided by the tank <br />manufacturer determine the tank capacity at the cal- <br />culated M dimension and the 1400!° volume (Y) tank <br />capacity. <br />(}f} tank capacity in gallons = -3--� - �_ <br />{Y} tank capacity in gallons = �' <br />5011/0 = jX) capacity J (Y) capacity x14(] O <br />_ � <br />J L <br />{iii <br />Upper <br />Tube <br />L <br />r� <br />(W) Valve G <br />Length, <br />y bottom of <br />j cut r(, <br />To Tarek 1t� <br />[Y} � <br />Tarek <br />{U} Valve Chart <br />Length, <br />top of cut Volume <br />Dipstick <br />r! <br />I <br />dote: The overfill valve must be installed perAHJ 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 />P11 <br />