Air Products Gasguard 250, Installation Manual

Page: 23 / 68

Gasguard
®
250 VMB System Installation Manual
Air Products and Chemicals, Inc. Page 3 - 4
Figure 3.3 : Alternate Process Line Connection
3.3 Vent Line
The vent line must be piped directly to an acceptable pollution abatement system
designed for the specific gas being vented. Process gas will be introduced into the
vent line during the purging cycles, when the process gas panel is being purged
prior to stick maintenance or removal. At this time, 50-60 LPM of nitrogen is also
being sent into the line through the vacuum venturi loop. The purging sequences
run approximately 30-45 minutes.
Process gas can be introduced to the vent
system at any time in the event of certain
multiple component failures, therefore the vent
line and pollution abatement system should be
capable of handling a full process gas cylinder
release in the event of catastrophic failure.