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St 57 <br /> Ss !� <br /> 91 e5 2 76 <br /> (7 9.-0f D,11 <br /> 06'TAMP <br /> 010'TAM <br /> ¢12,TANK <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 /> 100.0% <br /> 99.0% <br /> 9s o-76 <br /> FINAL SHUTOFF <br /> —__ ____` _ <br /> __ - t____ __ ____ __ ____�__ ____ _• __ ____�__ <br /> 1 I � INSTALLED @98% <br /> 97.0% ) ) ! PRIMARY SHUTOFF <br /> I ! WITH FINAL <br /> INSTALFD @9896 <br /> 956% FINAL SHUTOFF <br /> i INSTALLED@95% <br /> 99.016 <br /> PRIMARY SHUTOFF <br /> WITH FINAL <br /> INSTALED@95% <br /> 92.0X6 ) �� <br /> 7 _ <br /> C 91.0% I �' <br /> 90.0:6 <br /> ASSUMPTIONS: <br /> 89.016 — <br /> _ -GENERIC CYLiNDAICAL <br /> TAN K WITH FLAT ENDS <br /> 99.0% <br /> -PRIMARY SHUTOFF <br /> POINT IS A <br /> 87.D 6 <br /> CALCULATED OFFSET <br /> 15")FROM FINAL <br /> 86.0% SHUTOFF SETPOINT, <br /> USING GASOLINE WITH <br /> 85.0% A SPECIFIC GRAVITY OF <br /> 0.75 <br /> Ba,pab — <br /> 3 4 5 6 7 8 9 10 11 12 13 14 <br /> TANK DIAMETER(FEET) <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 /> 4 <br />