Pressure building circuit – Taylor-Wharton LP3 User Manual
Page 9
Pressure Building Circuit
The pressure building circuit serves to build pressure after filling the vessel. The circuit is also used to ensure
sufficient driving pressure during high product withdrawal periods. Opening the pressure building circuit
valve (V-3) permits the circuit to function. A stainless steel tag labeled “P.B.” is attached to the valve. When
the pressure inside the vessel drops below 450 psig, the pressure building regulators (PVC-1) begin to open.
Two pressure building regulators are used to maximize performance. The regulators open fully at 400 psig.
This creates a path from the liquid in the bottom of the container to the gas space in the top. This path
contains a pressure building coil (PBC-1) to vaporize product as it flows from the bottom to the top of the
vessel. Liquid is expanded to a vapor and pressure is increased in the vessel. This pressure building circuit
design is protect by United States Patent Number 6,276,143.
PVC-1
V-3
PVC-1
PBC-1
PBC-1
Figure 4: Back-view showing the pressure building circuit highlighted in blue.
(Frame omitted from view for clarity.)
9