• Do not pressure vent connection to over 1.1 bar absolute
(16 psia or 1.5 psig).
• If vent gas is used, ensure the gas is clean and filtered, and testing is
performed in a well-ventilated test area. Nitrogen or dry air gases are
recommended.
The vacuum vent connection consists of 12 mm push tube connection. The port vents
the vacuum test line back to atmosphere pressure after a test is completed. It is always
labeled with a “VENT” label.
If the testing area air concentration is free from tracer gases, this connection can
typically be left open and the test volume will be vented with ambient air. Alternatively,
users can install a tubing section to ensure vent air is coming from a cleaner area.
Ensure tube section is less than two meters or six feet (see P/N: LMSA5503 for 6-foot
tube section).
LACO recommends the Gas Vent Module (P/N: TV118018) for the following
applications:
• High humidity
• Test areas with high helium backgrounds
• Production test with fast cycles
• High sensitivity testing (<1 x 10
-8
mbar*L/sec)
See the Gas Vent Module Manual (SMT-07-1047) for more information.
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