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l A�at7endix 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 Fiberglasso 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 ple 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 calk - 00 bration chart provided by the tank manufacturer. Idid Riser Pipe with Face (A) 2 . Calculate 95 % of capacity. S 00Sea l Adaptor To Tank 3 . Locate the 95 % volume number on the tank calibra - Top (l • D, ) ToTank tion chart . x = S • S Bol :om 4. Find the dipstick number (X) which corresponds to p I the 95 % tank volume . And, find the dipstick number (Y) which corresponds to the 100% volume. = E( 5 5 . Subtract the dipstick number (X) from the tank diam- eter (Y) to find the upper tube reference number (Z) . (Y) - (X) _ (Z) G( 5 $ . 5 r �, 5 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 (� = l t 3 . The closest number which is less than 8933 gal . Is G ' S ( S 8910 gal . Choosing the closest number less than 7 . Is E less than 6-1 /2'7 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" . po For testable models only, ending in "T" : 5 . Dipstick number (X) = 82 " Upper Tube Length = E + ( A) - 1 - 1 /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" ? Ml 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 calibratin § an electronic tank level Upper Tube Length = E + ( A) - 1 - 1 /2 " system . i 23 I I