Uvitron International SUNRAY 400SM Instruction Manual, Rev. H
Page 7 of 23
SAFETY CONSIDERATIONS (CONTINUED)
3
3.4 Ozone Safety
High concentrations of ozone (O3) can cause discomfort, or at sufficiently
high levels can be dangerous. Arc lamps that are used in light curing
systems may generate ozone when oxygen in the air is exposed to short
wavelengths of light produced by the lamp (<210 nm). This ozone generation
can be avoided by using arc lamps that are constructed with ozone-free
quartz glass, which absorbs the ozone producing wavelengths. This type of
glass is used in Uvitron’s UVA and visible type lamps. Unfortunately, this ozone-free glass
also can reduce the effectiveness of some curing processes that may require the absorbed
short wavelengths (e.g. those for some inks and coatings).
For this reason, Uvitron’s UVB
type lamps are not constructed with ozone-free glass, and should be used only in well
ventilated work areas. Another way to cope with the ozone is to exhaust the lamp air
outdoors. Such exhausting involves no danger as the hot ozone containing gas is very
unstable and breaks down to oxygen rapidly in ducting.
Although some SunRay system configurations generate ozone at a level that could barely be
detected by odor and at a level well below the 0.1 parts per million allowable limit for
continuous exposure (American Conference of Government Hygienists), it is recommended
that all SunRay lamps systems be operated in well ventilated areas. For U.S. government
recommended ozone exposure limits and additional ozone safety information, visit the
following OSHA web page:
https://www.osha.gov/dts/chemicalsampling/data/CH_259300.html
3.5 Lamp Recycling
UV curing arc lamps (sometimes referred to as bulbs) all contain some level of mercury, and
should be disposed of responsibly in accordance to local, state and federal
laws. Excellent guidelines for mercury lamp recycling can be obtained at the
following National Electrical Manufacturers Association website:
Or call Uvitron customer service at (413) 731-7835 for more information.
