Labconco Protector Controlled Atmosphere Glove Box - Manual (Page 12)

Chapter 2: Prerequisites
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Support, Vibration and Preventive Requirements
In the preparation of a glove box site, please consider the following:
• A bench or stand that is rigidly mounted to the floor or fixed to the wall,
but not both, may be appropriate. 35" to 40" (889mm to 1,016mm) is
typical for standing height (Labconco adjustable height base stands
offered in Chapter 7 vary from 33" to 40" or 838mm to 1,016mm).
• The corners of a building typically have less vibration than the center,
which promotes analytical balance stability.
• The bench typically should not contain any vibration-producing
equipment, such as shakers or pumps.
• A marble slab with dampening pads placed within the enclosure is an
effective low cost means of controlling vibration for analytical balance
operation (see Balance Vibration Isolator in Chapter 7: Accessorizing
Your Glove Box).
Location Requirements
The Protector Glove Boxes have been designed to rest on a typical 29"-30"
(737mm-762mm) deep work surface. The height should be 35"-40" for
standing position. Avoid placing the glove box in high traffic areas where
walking might disrupt the operator or experimentation.
Oil and Exhaust Requirements for the Pressure
Relief Bubbler
To prevent over or under pressurization of the main glove box chamber and
prevent glass breakage, the Protector Controlled Atmosphere Glove Box
includes a pressure relief bubbler that activates at pressures and vacuums above
+5" water gauge or below -5" water gauge. The glove box ships with an oil
container with a specific gravity of 0.87 and the bubbler must be filled with oil
to a level of 6" (152mm). See Chapter 3 for instructions for adding oil.
WARNING: The overpressurization of air at positive
pressure would allow any contaminants inside the glove box
to vent into the room. To control this venting into the
laboratory, Labconco recommends exhausting the 3/4"
diameter pipe from the pressure relief bubbler to the outside.
If needed, 3/4" I.D. neoprene hose circulation kits can be
ordered from Chapter 7. If needed, purchase the 5441403
HEPA Filter Exhaust Kit from Chapter 7 to exhaust the
bubbler through HEPA filtration and into the room.
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