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e. Remove all traces of the cleaning fluid by carefully drying with clean, dry, oil-free
compressed air.
f. For reassembly, reverse the above procedure.
g. Clean the flanges and O-ring grooves thoroughly with acetone or alcohol, using clean, lint
free rags.
1-5
WARNING
_____________
Diffusion pumps are typically cleaned with acetone, alcohol, or other
solvents.
When heated, sprayed or exposed to high temperature equipment,
these solvents become flammable and explosive, causing serious injury
or death. Do not use near high temperature source. Ventilate work-
ing area with a blower and use in large, well-ventilated room. When
heated or sprayed, acetone or alcohol also becomes 4 to 5 times heav-
ier than air and will flow down, settling in tanks, pits, and low areas,
thus displacing air which can kill by asphyxiation. Use in a large, well-
ventilated room. Use of a self-contained breathing apparatus may be
necessary.
Acetone, alcohol, and other solvents are irritants, narcotics, depres-
sants, and/or carcinogenics. Their inhalation and/or ingestion may pro-
duce serious effects. Prolonged or continued contact with the skin will
result in absorption through the skin and moderate toxicity. Always
ensure that cleaning operations are carried out in large, well-ventilated
rooms, and wear eyeshields, gloves, and protective clothing.
CAUTION
________
Alcohol, acetone, and other solvents degrade O-ring materials reducing
their ability to hold a vacuum. Do not use any solvents on O-rings. If
necessary to clean O-rings, wipe with lint-free, clean cloth, wash in
detergent and water, or use a small amount of pump oil.
h. Remove all traces of acetone or alcohol by carefully drying with clean, dry, oil-free com-
pressed air. Install O-ring gasket.