Laserfiche WebLink
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 (AH1) 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- MI <br /> stalled in the tank: I..._j <br /> Distance from the 71 SO inlet tube flange to the cast 1 <br /> lug in the 7150 body (see figures), upper tube length. <br /> Note: the Upper Tube Length must be at least 16" to <br /> Include the protective bend in the tube. <br /> (a) = <br /> Distance from the 71 SO inlet tube flange to the top and <br /> bottom of lower tube, valve length. ( a) <br /> (W) = Upper <br /> (u) _ <br /> Tube <br /> Distance from the 71 SO Inlet tube flange to the bottom I <br /> of thetank. 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 O.f") (W) Valve <br /> (g) = Length, <br /> bottom of <br /> From the tank calibration chart provided bytank mane- cut <br /> facturerfind the dipstick number (Y) which corresponds <br /> to the 100% volume. ($) <br /> (Y) To Tank <br /> (Y) <br /> 1 . To determine shutoff percentage: Tank <br /> Subtract uppertube length (p) from distance to tank (U) Valve Chart <br /> bottom (B) Length, �.00% Vol- <br /> (X) _ (g) _ (p) . 2„ - top of cut ume Dip- <br /> stick <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. <br /> (X ) tank capacity in gallons = <br /> (Y) tank capacity in gallons = ......_.—._.. ... <br /> _ .. ....._ <br /> SO% _ (X) capacity ! ( Y) capacity X1 00 = <br /> Notes The overfill valve must be installed per AH1 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 B section 280.70 overfill <br /> valves should be 5et to a maximum of 9546. <br /> 20 <br />