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A ix <br /> 71SO Overfill Valve in Tank Shut off Level Worksheet <br /> Irn fr9irtant: This Is meant to be supplemental worksheet and not a substitute to following the Installation <br /> manual Instructions. ,All length measurements are in incites. Please contact the Authority having Jurlsdic- <br /> tion (AHA and review local, state, and national Modes 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: AM <br /> Distance from the 71 SO Inlet tube flange to the cast ti R <br /> lug in the 71 SO body (see figures), upper tube length. <br /> Note: the Upper Tube Length must beat least 16" to in- <br /> elude the protective bend In the tube. <br /> (D) _ P <br /> Distance from the 71 SO Inlet tube flange to the top and <br /> bottom of lower tube, valve length , <br /> (w) )(D) i <br /> Distance from the 7150 inlet tube flange to the bottom <br /> of the tank. Note: If a tank bottom protector Is present it <br /> may be necessary to acid this thickness to dimension <br /> (OPW 6111 & 61TP modes add 0.6") <br /> l (W} Valve <br /> Length, <br /> bottom of <br /> From the tank calibration chart provided by tank manu- cut <br /> facturer find the dipstick number {1) which corresponds <br /> to the 100% volume. {B} <br /> (Y) - i esi cH To Tank <br /> 1 . To determine shut-off percentage* (Y) <br /> Subtract upper tube length (D) from distance to tank (U) Valve Tank <br /> bottom (B) Length,Length, Chart <br /> 100% <br /> (X) = (II) ^ ( D) - 2" � %A top of cut Volume <br /> Using the tank calibration chart provided by the tank DlpsUck <br /> manufacturer determine the tank capacity at the cat= <br /> cula (X) dimension and the 100% volume (V) tank <br /> capacity. <br /> (X) tank capacity In gallons11 <br /> '�- <br /> (y) tank capacity in gallons ® <br /> 50 ,6 = (X) capacity ! (1f) capacity X1 00 <br /> Mote: The overfill valve must be installed per AHJ require- <br /> menu 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 most be removed and replaced. 0 For <br /> reference 40 CFR part 280 Subpart B Section 280.20 overfill <br /> valves should be set to a maximum of 9596. <br /> 21 <br />