Taylor-Wharton Auto Fill Laser Pak User Manual
Page 9
9
Pressure Building Circuits
A pressure building circuit serves to build pressure after filling a vessel. The circuit is also used to ensure
sufficient driving pressure during product withdrawal periods. The controller opens the pressure building
solenoid valve (V-4) that 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 (PB) 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.
Figure 4: Pressure building circuit for vessel B highlighted in blue.
(Frame and wiring omitted from view for clarity.)
V-4B
PB-B