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04, T+4 <br />K <br />$14' law <br />$II Tom <br />NOTE: When secondary, "positive," shut-off is set at 95% of tank volume, the level at which <br />primary shut-off occurs varies with tank volume. The above illustration depicts how tank volume <br />could influence the actual shut-off levels of a mechanical OPV. <br />9R -V% <br />9&0% <br />971% <br />95.0% <br />WAN <br />= glow <br />97.a% <br />i <br />9L0% <br />T01% <br />e91% <br />6!0% <br />671% <br />1160% <br />854" <br />-- <br />— — — —-- <br />----- <br />---- r-- <br />----41- <br />1 —A' <br />! <br />INSTALLED X98% <br />! <br />I <br />! <br />PRITH <br />FINAIMARY LSHUTOFF <br />INSTWD @98% <br />'A" <br />INSTALLED X95% <br />--- <br />----*-- <br />----�-- <br />_. FI NAL$HVTOFF <br />E-- <br />! <br />INSTALLED X98% <br />! <br />I <br />! <br />PRITH <br />FINAIMARY LSHUTOFF <br />INSTWD @98% <br />FINALSHUTOFF <br />INSTALLED X95% <br />PRi MARYSHUTOFF <br />WITH FINAL <br />INSTALED 095% <br />A'tSVM?TIONS; <br />{GENERIC CYUN DWCAL <br />TANK WRH FLAT ENDS <br />-PRIMARY SHUTOFF <br />POINT IS A <br />CALCULATED OFFSET <br />(5"1 FROM FINAL <br />SHUTOFF $MOINT, <br />USING GASOLINE WITH <br />A SPECIFIC GRAVDY OF <br />M75 <br />gyOK I I i I <br />3 4 5 G 7 S 9 10 U 12 13 14 <br />TANK DIM ET E R (FEETI <br />NOTE: The installation height of an OPV can be adjusted to optimize actual shut-off levels as <br />required. Consult local regulations for specific requirements in your area. The above graph <br />shows how a two-stage, mechanical overfill prevention device is influenced by tank diameter and <br />volume. <br />