Taylor-Wharton LP3 - Manual (Page 11)

Economizer Circuit
The economizer circuit reduces product loss due to normal evaporation of the liquid within the vessel. The
economizer regulator (PVC-2) opens when the pressure within the vessel exceeds 475 psig. This allows gas
from the top of the vessel to flow into the vaporizer circuit. Provided that gas from the vaporizer is being
withdrawn for use, the vessel pressure will be reduced. The primary safety valve (SV-1) will be prevented
from opening, avoiding product loss.
PVC-2
Figure 6: Economizer circuit highlighted in blue.
(Frame omitted from view for clarity.)
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