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\NorkSheet fCjr C)PW 61 SO a^­ <br /> Appgndix 8 <br /> 71 SO Overfill Valve in Tank Shut off Level Worksheet <br /> LMMUM 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 inthe 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 of least 16"to in- <br /> clude the protective bend in the tube. <br /> (D) 4 3 <br /> Distance from the 71 SO inlet tube flange to the top and T <br /> bottom of lower tube,valve I Th. (D) <br /> (W)=IZ4 11, Upper <br /> 'p r <br /> IiE 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 <br /> t'OPW 6111 &61 TjP models add 0.6"'1 (W Valve <br /> V <br /> alve <br /> (B)=IZfi 121E Y1__ 1. 2 b I/L I Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut cut <br /> facturer find the dipstick number rY)which corresponds <br /> to the 100%volume. <br /> (Y) To Tank <br /> "Y) <br /> 1. To determine shut-off percentage: <br /> i . Tank <br /> Subtract upper tube length(D)from distance to tank ;u)Valve Chart <br /> bottom(B) Length, 100% <br /> M='(8)-(D)-2" 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 M tank <br /> capacity. <br /> X tank capacity in gallons luv?- lo�a <br /> M tank capacity in gallons <br /> z SO% W capacity f(Y)capacity x100=944-43YX- 531 <br /> Note: The overfill valve must be installed per AHJ 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 8 Section 280,20 overfill <br /> valves should be set to a maximum of 95%. <br /> r <br /> 21 <br />