Installing And Connecting The Purge Gas Line - Ametek 241CE II Operator's Manual

3-16 | Model 241CE II Hydrocarbon Dewpoint Analyzer
5. Connect the tubing to the Vent Line Connection Fitting on the Filter-
block. Connect the other end to the fitting on the vent to atmosphere
(or low pressure flare header).

The standard regulator used on the Model 241CE II Analyzer has an
outlet pressure range of 0–690 KPAG (0–100 PSIG or 0–7 BARG).
NOTE
Adjust the Vent Line pressure close to atmospheric pressure. The Vent
Line pressure must not exceed 344 KPAG (50 PSIG or 3.5 BARG).
The Vent Line flow rate should be set at approximately 0.7–1.0 Nl/
min (1.5–2.0 SCFH), or less, above the filter bypass flow.

Installing and Connecting the Purge Gas Line

The purge gas is supplied by the customer/end user. The purge gas (typi-
cally N ) is used to purge the Cooler Housing with a dry gas to create a
2
dry atmosphere within the Thermoelectric Cooler compartment. This will
prevent ice from forming, which can damage the cooler. You can also use
dry air supplied at a water dewpoint temperature less than - 40 °C (-40 °F)
and a flow rate less than 15 L/day (0.53 CFD).
!
Purge gas pressure upstream of the Flame Arrestor Fitting cannot
exceed atmospheric pressure by more than 1 PSIG (70 mBAR).
CAUTION
The analyzer is supplied with a fitting for the purge gas line (see Figure
3-1). The purge gas inlet fitting (1/8" Swagelok
located on the backpan, to the right of the Measuring Cell Assembly.
To install the purge gas line:
1. Connect the purge gas line to the Purge Air Connection on the ana-
lyzer backpan.
2. Set the purge gas flow to a rate that is less than 15 L/day (0.53 CFD).
stainless steel fitting) is
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