Replacing The Alumina In The Oil Vapor Trap - Micromeritics Gemini VII 2390a Operator's Manual

Gemini VII

Replacing the Alumina in the Oil Vapor Trap

The activated alumina in the oil vapor trap becomes saturated during use. The alumina should be
inspected periodically and replaced when most of the alumina pellets are no longer white.
Do not perform the following procedure on used alumina. The resultant oil vapors may
cause a fire or an explosion.
1. Disconnect the vacuum pump from the analyzer and place it on a work table.
2. Loosen the wing nut on the clamp at the top of the oil vapor trap. Swing the clamp open and
remove the trap from the hose.
3. Loosen the wing nut on the clamp at the bottom of the oil vapor trap. Swing the clamp open and
remove the trap.
4. Remove one end fitting from the trap body and dispose of the used alumina in an appropriate
manner.
5. Wash the trap body with a detergent-based soap. Rinse with water, then rinse with isopropyl or
ethyl alcohol. Set the trap aside and allow to dry thoroughly.
Exposure of the trap body to oil vapor may cause small cracks on the inside surface of
the trap body. Under normal circumstances, these cracks will not cause problems or
leaks.
239-42828-01 - Dec 2012
Preventive Maintenance
9-11