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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 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 Into <br /> 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 least 16" to in- <br /> dude the protective bend in the tube. <br /> (p) = S rit 10' - <br /> II- <br /> Distance from the 7150 inlet tube flange to the top andMatti <br /> bottom of lower tube, valve length. (D) <br /> (w) = I .� <br /> (U) _ I LI Upper <br /> Tube <br /> Distance from the 7150 inlet tube flange to the bottom _ -- t I <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) Valve <br /> (B ) I3q 3 `{—_ Length, <br /> bottom of <br /> From the tank calibration chart provided by tank mann - cut <br /> facturer find the dipstick number (Y) which corresponds <br /> to the 100 % volume. (B) r, <br /> (Y) _ To Tank <br /> 1 . To determine shut- (Y)off percentage: Tank <br /> Subtract upper tube length (D) from distance to tank (U) Valve Chart <br /> bottom (B) Length, 100% <br /> (X) <br /> Unit - (D) - �" Wait <br /> Olt J top of cut "i <br /> Volume S <br /> Dipstick <br /> Using the tank calibration chart provided by the tank ' ;Y <br /> manufacturer determine the tank capacity at the cal- <br /> culated (X) dimension and the 100% volume (Y) tank <br /> capacity. I it <br /> 46I <br /> (X) tank capacity in gallons = V 011 v <br /> (Y} tank capacity in gallons <br /> SO% _ (X) capacity / (Y) capacity x100 = •�U <br /> Note: The overfill valve must be installed per AHJ require- <br /> ��^` ' meets and all applicable local, state, and national codes. If <br /> 04 the overfill valve is set above the allowable shut off percent- <br /> =0 �' S\ �t Si age the overfill valve must be removed and replaced. For <br /> t 6�v 1 .d reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> WMWWW <br /> t3 Z 3 � `l u 21 <br />