Laserfiche WebLink
Appendix B 6��.rIZ4 (�'►QcJl��1 <br /> 71 SO Overfill Valve in Tank Shut off Level Worksheet <br /> Imp_grtant: 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 /> I <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 <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 <br /> protective bend in the tube. <br /> (D) <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom oflaw r tube,,val�fiiength. <br /> (W) = 16 - 11r - fib (D) <br /> Upper <br /> (U)_ 16 r"-j4 Tube i <br /> Distance from the 71 SO inlet tube flange to the bottom <br /> g <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 /> i i <br /> (B)=I� -_L7 �U Length, <br /> bottom of <br /> 3 <br /> • From the tank calibration chart provided by tank manu- cut ' <br /> facturer find the dipstick number(Y) which corresponds <br /> to the 1001/o vvplume. (B) <br /> (Y)_�l �!� - 1�� - 1►a >'� To Tank <br /> 1. To determine shut-off percentage: Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve Chart <br /> bottom (B) I Length, i 100% <br /> (X)=(B)-(D)-2"= D�rL �Z/'1,�.._'_ �V.1/ Z i top of cut Volume <br /> Dipstick <br /> Using the`tali 4*iition chart pro ided by the tank <br /> manufacturer determine the tank capacity at the Cal- j { <br /> culated(X)dimension and the 100%volume(Y)tank I � <br /> capacity. <br /> (X)tank capacity in gallons <br /> (Y)tank capacity in gallons= <br /> SO%_(X)capacity/(Y)capacity x106= . <br /> Nate: The overfill valve must be installed per AM 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 Subpar;B Section 280.20 overfill <br /> valves should be set to a maximum of 95%. <br /> 21 <br />