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AppendiX <br /> 71 SO Overfill Valve in Tank Initial 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(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 /> Take the following measurements with the valve in- <br /> stalled in the tank <br /> Distance from the 71 SO inlet tube flange to the Zast <br /> lug in the 71 SO body(see figures),upper tube length. <br /> Note: the Upper T be Length must be at least 16"to in- <br /> clude the protective bend in the tube. <br /> = g ,, J <br /> ��tD) , <br /> Distance from the 7 1 SO inlet tube flange to the top and <br /> bottom of lower tube,valve length. I I ` <br /> (W)= 1 9Z... (D) <br /> _ Upper <br /> (U) <br /> Tube <br /> Distance from the 7 1 SO inlet tube flange to the bottom <br /> of the tank. Note: 11 a tank bottom protector is present it T �, <br /> may be necessary to add this thickness to dimension ` 1, <br /> (OPW 6111 &61 TP nodels add 0.6") h I i (W)Valve <br /> (B) 186 e� .D - Length, �) <br /> bottom of= 1' <br /> 1t <br /> From the tank calib ation chart provided by tank manu cut <br /> facturer find the di stick number(Y)which corresponds <br /> to the 100%volume. (B) <br /> M 13 1 To Tank <br /> \.) (Y) fl <br /> 1. To determine but-off percentage: Tank <br /> Subtract upper tube length (D)from distance to tank (U)Valve Chart <br /> bottom (B) ,, ti 3 • Length, 100% it <br /> (X)_(B)—(D)-2" (193Y � 8Z1-2._/QZ Yy top of cut 114 Volume it <br /> 2 3 S3 4 O° Dipstick <br /> Using the tank calibration chart provided by the tank i y' <br /> manufacturer determine the tank capacity at the cal- <br /> culated (X)dimension and the 100%volume(Y)tank 11 <br /> capacity. <br /> I <br /> 2 S,3 S it <br /> (X)tank capacity i gallons= 3 ; f� <br /> (Y)tank capacity in gallons= <br /> SO%_(X)capacit /(Y)capacity x100= 2 .5(0 <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 /> /0 0 Z 5,61 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 /> 21 <br />