Labconco Protector Controlled Atmosphere Glove Boxes 5080102 - Manual (Page 30)

ROUTINE MAINTENANCE
31
Routine Maintenance Schedule
The maintenance required to the glove box is strongly dependent upon the amount of use
and the tolerance to leakage. Highly critical or hazardous procedures dictate a more frequent
inspection. Establish a schedule and keep a record of maintenance that reasonably satisfies the
needs of the piece of equipment. Include in that schedule the following items:
Quarterly, or more frequently
• Check the oil level in the bubbler through the sight glass.
• Inspect the gloves for signs of damage or wear. Replace if necessary. See procedure
below.
• Check the closing tension of the door latches. Look for consistent and sufficient gasket
compression.
As Needed Based on the Application
• Perform leak checks
• Check Pressure Relief Bubbler. See procedure below.
• Conduct maintenance on the vacuum pump as recommended by the manufacturer.
Checking Pressure Relief Bubbler
• Bring the glove box pressure to atmospheric pressure.
• Make sure the oil level indication in the sight glass is at the pressure relief level desired for
your glove box operations. Recommended oil level is 7.
• If you want the pressure to relieve at a higher level – less than 10" H
2
O pressure, add
vacuum pump oil having a specific gravity of .87 by following the instruction described in
the Installation Section Pressure Relief Bubbler.
• If you want the pressure to relieve at a lower level, drain off some of the oil by opening the
drain cock located at the bottom of the bubbler.
• Retighten the drain cock securely.
Glove Replacement
If it becomes necessary to change gloves without disturbing the integrity of the glove box
environment, follow these steps:
• Remove the O-ring from the old glove.
• Roll the old glove cuff bead from the inner groove nearest the window to the outside
groove.
• Insert the new glove through the old glove until the fingers of both are inside the glove box.