Taylor-Wharton EF-450 - Manual (Page 12)

Economizer Circuit
The economizer circuit reduces product loss due to normal evaporation of the liquid within the vessel. The
economizer stage of the pressure building/economizer regulator (PCV-1) opens when the pressure within the
vessel exceeds the economizer setpoint. The economizer setpoint varies depending on the model. 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withdrawn for use, the vessel pressure will be reduced.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.
PCV-1
Figure 6: Economizer circuit highlighted in blue.
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