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Appendix C HOW TO LOCATE THE POSITION OF THE 71 SO FOR COMPLETE SHUT-OFF AT A GIVEN TANK CAPACITY Note : This Appendix only applies when AHJ require - EXAMPLE ments call for complete shut-off at a given tank capacity. 1 . For an Owens- Corning Model G3 Fiberglass° Tank See page 4 for standard measurements . Calibration Chart: The length of the upper tube and the placement of the Tank Capacity - 10, 000 gal ., nominal 9,403 gal . 71 SO valve body determine the shut-off point. The sam- NOTE : Use actual capacity only pie calculation below will provide for complete shut- off at 95 % . In all cases, the upper tube length must be a Tape measure minimum of 6- 1 /2 " plus the length of the riser pipe . All length measurements are in inches . INSTRUCTIONS 1 . Find the tank capacity ( in gallons) from the tank cali - bration chart provided by the tank manufacturer . Riser Pipe with Face (A) 2 . Calculate 95 % of capacity. Seal Adaptor ToTank 3 . Locate the 95% volume number on the tank callbra- Top (I . D. ) To(Tank tion chart. Bottom 4. Find the dipstick number (X) which corresponds to the 95% tank volume . And , find the dipstick number (Y) which corresponds to the 100% volume, 5 . Subtract the dipstick number (X) from the tank diam - eter (Y) to find the upper tube reference number (Z) . (Y) - (X) — (Z) 2 . 95 % of actual tank capacity = 0.95 x 9403 gal . _ 8933 gal . 6 . Add 1 . 5 " to (Z) to find the upper tube depth E . (Z) + 1 .5 " = E 3 . The closest number which is less than 8933 gal . Is 7 . Is E less than 6- 1 /2" ? 8910 gal . Choosing the closest number less than 95% of actual capacity ensures that complete NO Upper tube length is E plus the distance from the shutoff will occur when the tank is no more than top of the Face Seal Adaptor installed on the riser 95 % full . pipe to the inside, top lip of the storage tank (A) . 4. The calibration chart reading of 8910 gal . corre- Upper Tube Length = E + (A) sponds to a dipstick measurement of 82" . For testable models only, ending in "T" : 5 . Dipstick number (X) = 82 " Upper Tube Length = E + ( A) — 1 A /2 " Tank diameter (Y) = 92 " (Y) - (X) _ (Z) (92 "- 82 = 10" ) (Z) = 10" YES Upper tube length is 6- 1 /2 plus the riser pipe 6 . (Z) + 1 .5 " = E ( 10" + 1 . 5 " = 11 .5 " ) measurement (A) . Upper Tube Length = & 1 /2" + (A) 7 . Is 11 .5 " less than 6- 1 /2 " ? For testable models only, ending in "T" • NO Measure the distance from the top of the FSA-400 Upper Tube Length = 61 /2" + (A) — 1 - 1 /2' Face Seal Adaptor installed on the riser pipe to the inside, top lip of the storage tank and obtain measurement (A) . NOTE : You must find the actual tank capacity num - Upper tube length = E + (A) ber that correlates to the 6- 1 /2" + (A) depth for the station records . This number may also be used or For testable models only, ending in "T": the purposes of calibrating an electronic tank level Upper Tube Length = E + ( A) — 1 A /2" system . 23