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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 AH1 require- EXAMPLE ments call for complete shut-off at a given tank capacity. 1 . For an Owens-Corning Model G-3 Fiberglassg 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 Pace 2. Calculate 95% of capacity. Seal Adaptor ToTank 3. Locate the 95 % volume number on the tank callbra- Top (l , o ) To�Tank tion chart. Ho om 44 Find the dipstick number (X) which corresponds to --1 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 , m 6. Add 1 .5 " to (Z) to find the upper tube depth E. 8933 gal . (Z) + 1 .5 = E 3 . The closest number which is less than 8933 gal . Is 7, is E less than 6- 1 /2"7 8910 gal . Choosing the closest number less than NO Upper tube length is E plus the distance from the 95 % of actual capacity ensures that complete top of the Face Seal Adaptor installed on the riser shutoff will occur when the tank is no more than95 % full * pipe to the inside, top lip of the storage tank (A) . Upper Tube Length = E + {A) 4. The calibration chart reading of 8910 gal, corre- 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 -1 /2" Tank diameter (Y) = 92" (Y) - (X) = (Z) (92 "- 82" = 10") YES Upper tube length is 61 /2" plus the riser pipe (Z) = 10" measurement (A). 6. (Z) + 1 .5 " = E ( 10" + 1 .5" = 11 .51 Upper Tube Length = 6- 1 /2" + (A) E11 .5 " 7. Is 11 .5" less than 6-1 /2" 7 For testable models only, ending in "T" ; NO Measure the distance from the top of the FSA-400 Upper Tube Length = 6-1 /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) - 11 /2" system. i z i 23 s