Laserfiche WebLink
Appendix A <br /> 71 SO Overfill Valve Upper Tube Calculation 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 /> Desired tank capacity for shut-off: SO%= <br /> Dipstick Number on Tank Chart that corresponds to 100%volume(Y) (y) <br /> Dipstick Number on Tank Chart that corresponds to SO%(X)_ l0-�--1 N <br /> Upper Tube Reference Number Z=Y-X u (Z) <br /> Upper Tube Depth Inside Tank C=Z-2" 2 <br /> Distance from top sealing surface for 71 SO Lip'to inside the (C) <br /> top of Storage Tank, A= <br /> ForNon--Testable 71 SO models vex <br /> In all cases for non-testable 71 SO models,the top of the valve body must protrude at least 61h"into the tank to <br /> provide a minimal clearance for proper operation.3 Additionally the total Upper Tube Length must beat least 16" <br /> of length to include the protective bend in the tube. <br /> Is C less than 6'/2" Yes / No <br /> If NO,Upper Tube Length(D)=C+A <br /> If YES,Upper Tube Length(D)=61/2"+A <br /> Upper Tube Length= <br /> For Testable 7150 models only <br /> In all cases for Testable 7150 models,the top of the valve body must protrude at least 6 1/z"into the tank to provide <br /> a minimal clearance for proper operation.' Additionally the total Upper Tube Length must beat least 141/2"of <br /> length to include the protective bend in the tube. <br /> Is C less than 5" Yes / No <br /> If NO,Upper Tube Length(p)=C+A-- 1 '/z" <br /> If YES,Upper Tube Length(D)=6'/i"+ A-- 1 1/z" <br /> Upper Tube Length= <br /> ' Seating surface may be the top of the Face SealAdaptor,the built in sealing ledge inside some spill containers,or on non-vapor <br /> tight applications the top of rhe pipe nipple <br /> 7 Some Underground Storage tanks utilize a manway system at the top. Make sure to use the top of the storage tank Ibrmeasure- <br /> ment and not to top of the manway. Co nsuit your underground tank manufacturer for height of the manway <br /> ' This measurement is taken from the seam where the upper tube is attached to the valve body to the Inside of the tank top. <br /> 19 <br />