Laserfiche WebLink
J ' )j <br /> Appendix A <br /> 71 SO Overfill Valve Upper Tube Calculation Worksheet <br /> lm ortant: 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 /> a <br /> Desired tank capacity for shut-off: SO%=��� <br /> Dipstick Number(Y)on Tank Chart that corresponds to 100%volume (y) <br /> Dipstick Number on Tank Chart that corresponds to 5O%(X)_ <br /> Upper Tube Reference Number Z=Y-X ®2 (Z) <br /> — <br /> Upper Tube Depth Inside Tank C=Z-Z" <br /> Distance from top sealing surface for 71 SO Lip' to inside the <br /> top of 5torage Tank2 <br /> For Non-Testable 71 SO models onir► <br /> In all cases for non-testable 71 SO models,the top of the valve body must protrude at least 61/2"into the tank to <br /> provide a rninimai clearance for proper operation,' Additionally the total Upper Tube Length must be at least 16" <br /> of length to include the protective bend in the tube. <br /> is C less than 61/2" Yes 10 <br /> If NO,Upper Tube Length (D)= C+A <br /> If YES,Upper Tube Length (D)=61/2"+A e <br /> Upper Tube Length= �+ •3 <br /> For Testable 71 S❑ modeIs__only <br /> In all cases for Testable 71 SO models,the top of the valve body must protrude at least 6�/2"into the tank to provide <br /> a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 14'1/2"of <br /> length to include the protective bend in the tube. <br /> Is C less than 6 1/2" Yes 1 No <br /> If NO, Upper Tube Length (❑)=C+A-- 1 1/2" <br /> If YES,Upper Tube Length (D)=61/2"+A- 1 t1/2" <br /> Upper Tube Length= <br /> ' Sealing surface may be the fop of the Face Seal Adaptor,the built in sealing ledge inside some spill containers,or on non-vapor <br /> tight applications the top of the pipe nipple <br /> 2 Some Underground Storage tanks utilize a man way system at the top, Make sure to use the top of the storage rank for measure- <br /> ment and not to top of the manwoy. Consultyour underground rank manufacturer for height of the manway <br /> a This measurement is token from the seam where the upper tube is attached to the valve body to the inside of the tank top. <br /> 20 <br />