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Tech: Steve White Tank: 02 Grade: 91 <br /> Appendix B <br /> 61 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 in- <br /> stalled in the tank: z, - <br /> Distance from the 61 SO inlet tube flange to the cast <br /> lug in the 61 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 /> 55.25 inches <br /> Distance from the 61 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. <br /> (D)154.00 <br /> (W)= inches Upper <br /> (V)= 152.00 inches Tube <br /> Distance from the 61 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 &61 TP models add 0.6") (W)Valve <br /> (B)= 158.00 Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the dipstick number(Y)which corresponds } <br /> to the 100%volume. (B) <br /> (Y)= 112.00 inches To Tank <br /> ! (Y) I <br /> 1. To determine shut-off percentage: Tank I <br /> Subtract upper tube length(D)from distance to tank (U)Valve Chart 1 <br /> bottom (B) Length, 100% <br /> (X)=(B)—(D)-2"= 100.75 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 <br /> capacity. i <br /> (X)tank capacity in gallons= 4,809 r <br /> (Y)tank capacity in gallons= 5,075 <br /> SO%=(X)capacity/(Y) capacity x100= 94.75 <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% =90.0%-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 />