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6050H
User's Guide
General Operation
Bath Fluid
Heat transfer salt is intended to be used with the 6050H bath. Other fluids
should not be used.
Safety
Always consider the safety issues associated with using salt in the Warnings and
Cautions sections of the Safety Information section (see the Safety Information
section of this manual). Obviously where there are extreme temperatures there
can be danger to personnel and equipment. Salt may also be hazardous for other
reasons. Some salt may be considered toxic. Contact with eyes, skin, or
inhalation of vapors may cause injury. A proper fume hood must be used if
hazardous or bothersome vapors are produced.
Fluids at high temperatures may pose danger from BURNS,
FIRE, and TOXIC FUMES. Use appropriate caution and safety
equipment.
Salt may be flammable or pose a fire hazard and require special fire safety
equipment and procedures.
Environmentally hazardous salts require special disposal according to
applicable federal or local laws after use.
Heat Transfer Salt
Heat transfer salt is often used at high bath temperatures. Salt has a very high
upper temperature limit and a wide useful temperature range. New bath salt
melts around 145 °C however its viscosity is such that its functional range is from
around 180 °C up to the upper limit of the bath. The melting temperature will
change as the salt ages or becomes contaminated. When the bath is not in use
we recommend keeping the temperature above 230 °C to prevent excessive
amounts of salt from freezing on the stir shaft and other cooler parts of the tank.
Viscosity is low, especially at higher temperatures. Salt when melted has very
low electrical resistivity. Salt may be corrosive to some materials. Salt will quickly
oxidize the coating on galvanized metal. Carbon steel may be used with salt up
to 450 °C. Beyond this temperature stainless steel is recommended.
Keep all combustible materials away from the bath when using
salt. Operate the bath on a heat-proof surface such as concrete.
Provide a means of safely containing any spills which may
occur.
The greatest safety concern with liquid salt is with its high temperature. The fluid
provides a source of heat which can ignite or destruct materials. Especially
dangerous are spills since the hot fluid is difficult to contain. Salt may also cause
steam explosions if it comes into contact with water or other volitile fluids. Using
salt requires special caution. Read carefully the information and safety data
sheets provided with the salt. Use of a fume hood is recommended to remove
any products of decomposition or oxidation.
24
WWarning
WCaution
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