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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 G-3 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 T- Tape measure minimum of 6-1 /2" plus the length of the riser pipe . All length measurements are in inches . J R» INSTRUCTIONS j FY 1 . Find the tank capacity (in gallons) from the tank Cali- bration chart provided by the tank manufacturer. Riser Pipe ' with Face 2. Calculate 95 % of capacity. Seal Adaptor (A) To Tank (S) 3. Locate the 95 % volume number on the tank calibra- Top (1 • D• ) To Tank tion chart. Bottom 4. Find the dipstick number (X) which corresponds to = li _- the 95% tank volume. And, find the dipstick number (Y) which corresponds to the 10006 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 . _ 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 than 95 % pipe to the inside, top lip of the storage tank (A) . Upper Tube Length = E + (A) 4. The calibration chart reading of 8910 galcorre- 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 - 112" Tank diameter (Y) = 92 " (Y) - (X) _ (Z) (92 "- 82 " = 1011) ff YES Upper tube length is 6- 1 /2" plus the riser pipe (Z) 10 measurement (A) . 6. (Z) + 15' = E ( 10" + 1 .5 " = 11 .5 ") Upper Tube Length = 6- 1 /2" + (A) E115' 7. Is 11 .5 " less than 6- 1 /2117 For testable models only, ending in "T"• NO Measure the distance from the top of the FSA400 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 EForrable models only, ending in "T": the purposes of calibrating an electronic tank level ube Length = E + (A) - 1 - 1 /2" system . 23