Installing And Connecting The Purge Gas Line - Ametek 241CE II User Manual

5. Connect the tubing to the Vent Line Connection Fitting on the Filterblock.

Installing and Connecting the Purge Gas Line

The purge gas is supplied by the customer/end user. The purge gas (typically
N
2
sphere 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).
The analyzer is supplied with a fitting for the purge gas line (see Figure 2-1).
The purge gas inlet fitting
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 analyzer
2. Set the purge gas flow to a rate that is less than 15 L/day (0.53 CFD).
2-16 | 241CE II Hydrocarbon Dewpoint Analyzer
Connect the other end to the fitting on the vent to atmosphere (or low
pressure flare header).
The standard regulator used on the 241CE II Analyzer has an outlet
pressure range of 0–690 KPAG (0–100 PSIG or 0–7 BARG). Adjust the
Vent Line pressure close to atmospheric pressure. The Vent Line pres-
sure 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/minute (1.5–2.0
SCFH), or less, above the filter bypass flow.
) is used to purge the Cooler Housing with a dry gas to create a dry atmo-
Purge gas pressure upstream of the Flame Arrestor Fitting cannot
exceed atmospheric pressure by more than 1 PSIG (70 mBAR).
(1/8"
backpan.
®
Swagelok stainless steel fitting) is located on
PN 903-8797, Rev A