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Appendix C <br /> HOW TO LOCATE THE POSITION OF THE 71 SO FOR COMPLETE SHUT-OFF AT A GIVEN TANK CAPACITY <br /> Note : This Appendix only applies when AHJ require- EXAMPLE <br /> ments call for complete shut-off at a given tank capacity. 1 . For an Owens-Corning Model G -3 Fiberglass ' Tank <br /> See page 4 for standard measurements . Calibration Chart : <br /> The length of the upper tube and the placement of the Tank Capacity - 10, 000 gal ., nominal 9 ,403 gal . <br /> 71 SO valve body determine the shut-off point . The sam - NOTE : Use actual capacity only <br /> ple calculation below will provide for complete shut- off <br /> at 95 % . In all cases, the upper tube length must be a Tape measure <br /> minimum of 6- 1 /2 " plus the length of the riser pipe . All <br /> length measurements are in inches . <br /> INSTRUCTIONS <br /> 1 . Find the tank capacity ( in gallons) from the tank cali - - - <br /> bration chart provided by the tank manufacturer . Riser Pipe <br /> with Face <br /> 2 . Calculate 95 % of capacity. Seal Adaptor To(Tank <br /> ( <br /> 3 . Locate the 95 % volume number on the tank calibra - Top (l _ D. ) To Tank <br /> tion chart. Bottom <br /> 4 . Find the dipstick number (X) which corresponds to <br /> the 95 % tank volume . And , find the dipstick number <br /> (Y) which corresponds to the 100% volume . <br /> 5 . Subtract the dipstick number (X) from the tank diam - <br /> eter (Y) to find the upper tube reference number Q . <br /> (Y) - (X) — (Z) 2 . 95 % of actual tank capacity = 0 .95 x 9403 gal . _ <br /> 6 . Add 1 . 5 " to (Z) to find the upper tube depth E . 8933 gal . ` U t 133 + c-�ra \ S k3 `i <br /> (Z) + 1 . 5 " = E 3 . The closest number which is less than 8933 gal . Is <br /> 7 . Is E less than 6- 1 /2 " ? 8910 gal . Choosing the closest number less than <br /> 95 % of actual capacity ensures that complete <br /> NO Upper tube length is E plus the distance from the shutoff will occur when the tank is no more than <br /> top of the Face Seal Adaptor installed on the riser 95 % full . } <br /> pipe to the inside, top lip of the storage tank (A) . � �' ` 'j <br /> Upper Tube Length — E + (A) 4 . The calibration chart reading of 8910 gal . corre- <br /> sponds to a dipstick measurement of 82 " . <br /> =Upper <br /> le models only, ending in "T" : 5 . Dipstick number (X) = 82 " r <br /> e Length = E + ( A) — 1 - 1 /2 " Tank diameter (Y) = 92 " N avLr � �_ �' <br /> (Y) - (X) _ (Z) (92 "- 82 " = 1011) <br /> YES Upper tube length is 6- 1 /2 " plus the riser pipe <br /> measurement (A) . 6 . (Z) + 1 . 5 " = E ( 10 " + 1 . 5 = 11 . 519 z5k 1 .5 <br /> = <br /> Upper Tube Length = 6- 1 /2 " + (A) E 11 . 5 t <br /> 7 . Is 11 . 5 " less than 6- 1 /2 " ? L - L� <br /> For testable models only, ending in "T"• NO Measure the distance from the top of the FSA-400 <br /> Upper Tube Length — 6- 1 /2 " + ( A) — 1 - 1 /2 ' Face Seal Adaptor installed on the riser pipe to <br /> the inside, top lip of the storage tank and obtain <br /> measurement (A) . <br /> NOTE : You must find the actual tank capacity num - Upper tube length — E + (A) <br /> ber that correlates to the 6- 1 /2 " + (A) depth for the <br /> station records . This number may also be used or For testable models only, ending in "T" : <br /> the purposes of calibrating an electronic tank level Upper Tube Length = E + ( A ) — 1 - 1 /2 " <br /> System . <br /> 23 <br />