Installation Process
Fine tuning
leakage compensation
After enclosure has been pressurized, the purge valve needs to be closed to
allow the leakage compensation valve to control air flow into the enclosure.
Setting an appropriate working pressure saves purge gas.
The leakage compensation valve may need to be adjusted if:
•
the enclosure is modified
•
gland plates are added or replaced
•
changes are made to the purge system
•
the enclosure cannot maintain pressure
•
air is constantly flowing through the relief valve
•
the purging indicator cycles rapidly.
To adjust the valve:
1.
If you have not already done so, turn on the purge supply, move the
purge valve lever to the Purge ON position, wait for the enclosure
to pressurize and then move the lever to the Purge OFF position.
Leakage
compensation valve
Purge off
Purge on
Lever
2.
Check the air flow through the relief valve.
If air is constantly flowing,
the leakage compensation valve is open too
far. Continue to step 3 to adjust the valve.
If the valve is opening and closing rapidly,
the leakage compensation
valve setting requires minor adjustment. Continue to step 3 to adjust
the valve.
If the relief valve remains closed but the enclosure cannot maintain
pressure,
the leakage compensation valve is closed too far. Continue to
step 3 to adjust the valve.
Thermo Fisher Scientific
Antaris EX Safety, Installation, and Site Preparation Guide
51
