Laserfiche WebLink
Appendix A <br /> 71 SO Overfill Valve Upper Tube Calculation Worksheet <br /> Im rtant: 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)= 25N3) = 119 ;,/B 1 I g 3/g <br /> Dipstick Number on Tank Chart that corresponds to SO%(X)= 254 3 x o_qs% 2 y,,S9 — Ob 3/� (X) <br /> Upper Tube Reference NumberZ=Y-X ' " J (Z) <br /> Upper Tube Depth Inside Tank C=Z-2" — 2 <br /> Distance from top sealing surface for 71 SO Lip'to inside the 10 (C) <br /> top of Storage Tank2 A= <br /> For Non-Testable 71 SO models oniv <br /> In all cases fornon-testable 71 SO models,the top of the valve body must protrude at least 6'/2"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 1/2" Yes / U <br /> If NO,Upper Tube Length(D)=C+A / O + �' ��Z = }9 '/2- <br /> If YES,Upper Tube Length(D)=61/2"+A <br /> Upper Tube Length= _�9 /2. <br /> For Testable 71 SO models oni <br /> In all cases for je5 <br /> jable 71 SO models,the top of the valve body must protrude at least 61/2"into the tank to provide <br /> a minimal clearance for proper operation.; Additionally the total Upper Tube Length must be at least 14'/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(D)=C+A- 1 1/2" <br /> If YES,Upper Tube Length(D)=61/2"+A- 1 '/2" <br /> Upper Tube Length <br /> ' Sealing surface may be the top 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 tank for measure- <br /> ment and not to top of the manway. Consult 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 /> 20 <br />