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rZ _ 2 3 S la.. -t <br />Appendix 0 <br />71 SO Overfill Valve in Tank Shut off Level Worksheet <br />i o : 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#risdic-. <br />tion (AWS) and review local, state, and national'codes to determine the regulatory requirements governing <br />shut-offxapocity in your region, as well as take into account other considerations such as extreme tank tilt. <br />Take the following M" 6asurements with the valve in-. <br />stalled in the tank: <br />Distance from the !ISO 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 protective bend in the tube, <br />V _ 7 2 jf <br />Distance from the 71 SO inlet tube flange to the top and <br />bottom of lower tube, valve length. <br />(W) _ 1 ?3 „ <br />Distance feom 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 />(OPW 6111 & 61TP models add 0.6") <br />From the tank calibration chart provided by tank manu- <br />facturer find the dipstick number (Y) which corresponds <br />to the 100% volume. <br />(Y) _ _3-- <br />1. To determine shut-off percentage: <br />Subtract upper tube length (D) from distance to tank <br />bottom (B) <br />(X) _ (g) - (D) - 2" _ % hz - .Z : /o y 37 <br />Using the tank calibration chart provided by the tank <br />manufacturer determine the tank capgcity at the cal- <br />culated (X) dimension and the 100% volume (Y) tank <br />capacity. <br />(X) tank capacity in gallons = / Y/8 p <br />(Y) tank capacity in gallons = / `� g "aG <br />SO% _ ()) capacity / (Y) capacity x100 <br />lt-tIgI ;K/ <br />i�9�b <br />(D) <br />Upper <br />Tube <br />t� <br />(B) <br />To Tank <br />(U) Valve <br />Length, <br />top of cut <br />(W) Valve <br />I Length, <br />bottom of <br />cut <br />! 1) <br />(Y) <br />Tank <br />Chart <br />100% <br />Volume <br />Dipstick <br />Note: The overfill valve must be installed per AMJ 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 280.20 overfill <br />valves should be set to a maximum of 95%. <br />