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Tech: Kris Bell Tank: 02 Grade: 89 J <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(AHA 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 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 16°to in- <br /> clude the protective bend in the tube. <br /> (D)= 46.38 inches <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (W)_ inches ( <br /> (U)= inches Upper <br /> 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 J <br /> (OPW 6111 &61 TP models add 0.6") (W)Valve <br /> (B)= 136.00 inches Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- IL cut <br /> facturer find the dipstick number(1)which corresponds <br /> to the 100%volume. (B) <br /> (Y)= 95.75 inches To Tank i <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart <br /> bottom(B) Length, 100% <br /> (X)_(B)—(D)-2"= 85.63 inches 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 1 <br /> capacity. <br /> (X)tank capacity in gallons= 11,352 <br /> (Y)tank capacity in gallons= 12.032 <br /> 509'0=(X)capacity/(Y)capacity x100= 94.34 <br /> Note: The overfill valve must be installed per AHJ require- <br /> Results: Pass ments and all applicable local,state,and national codes. If <br /> the overfill valve is set above the allowable shut-off percent- <br /> If SO% =90.096-95.0% condition is a pass. age the overfill valve must be removed and replaced. For <br /> If SO% =<=89.9%or>=95.1%condition reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> Is a fail Need Repairs. valves should be set to a maximum of 95%. <br /> 21 <br />