
Distillation Process Analyzer DPA-4.5
Design and function
4.4.3 Fluid technology
The fluid technology subassembly contains components for
regulating the pressure and filtering the required instrument air and
bubble gas (nitrogen). To protect the cooling pipe circuit, a filter
unit is installed for filtering the cooling medium. If the optional
receiver tempering
is installed, there will normally be a needle
valve for adjusting the flow of cooling medium through the receiver.
It can only be omitted, if cooling pipe and receiver are cooled
parallel.
Figure 4.5: Fluid technology with receiver tempering option
1
Bubble gas pressure
regulator
2
Pressure monitor
pressure regulator
3
Purging gas pressure
regulator
4
Cooling medium needle
valve (
receiver
tempering
option)
5
Cooling medium filter
66
December 2013