Distillation Process Analyzer DPA-4.5
Installation and preparation for commissioning
Notes regarding the vent and drain
The device must be connected to a vent and drain. If the lines are
not to be depressurized:
•
Before establishing the pipe connections, equip the lines to the
device with a manually activated, system-side shut-off valve.
•
For specifications of the maximum back-pressure in the drain,
please refer to the technical data.
WARNING
Danger of explosions due to uncontrolled
chemical reactions
Make sure that the vent/drain system and other
connected lines only convey the petrochemical
product and its exhaust gases.
•
Make sure that the product can flow off without back pressure.
A sufficiently large cross-section of the drain must be provided
to ensure this.
•
Make sure the vent is open to the atmosphere and only
exposed to normal variations in pressure. Greater variations
affect the results of measurements. Connect the analyzer to a
separate vent if necessary.
A. Vent/drain system
The analyzer is equipped with a combined vent/drain system as
standard. Purging gas, bubble gas and evaporated product are
discharged into the vent line. Liquid product is discharged into the
drain. Bubble gas and purging gas also flow into the drain along
with the liquid product.
In the event of a fault, liquid product can be forced into the vent
line. The liquid product can flow from the vent to the drain via the
connection to the drain line. Product that condensates in the vent
line can thus also flow off to the drain line during normal operation.
NOTE
For DPA-4.5 LowP a separate vent line is
necessary.
B. Separated vent and drain
Alternatively, the vent can be completely separated from the drain:
•
Make sure that liquid product can flow out of the vent in the
system.
•
Take into account on the system side that bubble gas and
purging gas also flow into the drain line along with the liquid
product.
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December 2013