Separation595 Gapf

NAPHTHA-KEROSENE 12°F GAP

KEROSENE-LIGHT DIESEL 62°F OVERLAP

LIGHT DIESEL-HEAVY DIESEL 169°F OVERLAP

HEAVY DIESEL-VGO 70°F OVERLAP

VGO-VACUUM BOTTOMS 70°F OVERLAP

OVERLAP IS A GAP WITH A NEGATIVE SIGN.

the flash zone and the tower top. Hash zone pressure is set as the sum of reflux drum pressure and combined pressure drop across condenser and trays above the flash zone. A pressure drop of 5 psi between the flash zone and furnace outlet is generally allowed.

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