Labconco CentriVap Centrifugal Concentrators and Cold Traps 74750 Series - Manual (Page 18)

Chapter 3: Getting Started
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• If the compounds used attack acrylic, consider using the optional glass
chamber lid. See Chapter 6: Accessories for Your CentriVap.
• If the stainless steel cold trap chamber is attacked by the compounds in use
consider using the optional Glass Trap insert. See Chapter 6: Accessories for
Your CentriVap.
• When using a rotary vane vacuum pump the oil in the pump should be
checked often. It must be changed if it is cloudy, shows particles or is
discolored. The useful life of vacuum pump oil can be extended if the
vacuum pump is operated for an extended of time after the CentriVap run is
over. This allows contaminants to be purged from the hot oil. This must be
done with the inlet to the pump blocked off to prevent air from free flowing
through the pump. If the pump is operated at an elevated vacuum level, oil
will be expelled from the pump and damage will occur.
• If optional secondary traps are used, monitor their condition often and
replace them when they are saturated. A new acid trap is off-white and
changes color to purple when used up. A new moisture trap is blue and
changes color to pink when used up. The solvent trap molecular sieve does
not change color when saturated so extra care must be taken to determine
when a replacement cartridge should be installed.
Solvent Safety Precautions
CAUTION: The CentriVap is not classified as “explosion proof.” It has
been designed with safety as a primary
consideration and should be used in a
prudent manner using “good laboratory practices.” It has been designed
for use with compounds as described in the United States National Electrical
Code Class I, Group D. The heater may be programmed to run as hot as
100°C, however, the heater element may normally run at 110°C. A thermal
fuse limits the heater to a maximum temperature of 141°C. It is important
that the solvents used are compatible with these temperatures. Do not
evaporate solvents that have an autoignition temperature below 180°C. Do
not evaporate solvents that are classified as Group A, B, or C by the
National Electrical Code. Evaporate only non-flammable or Group D
solvents with autoignition temperatures 180°C or above. Use of other
compounds could cause an explosion.