Safety
1-6
Part 1089210A04
E 2010 Nordson Corporation
Ozone
Ozone (O
3
) is a colorless gas that is generated by the reaction of
short-wave UV light (around 200−220 nanometers) with air, and it occurs
whenever high-energy electrical discharge is present.
Ozone readily reverts to breathable oxygen when mixed with atmospheric
air. Ozone should be removed from the UV source via a sealed duct and
discharged to atmosphere according to local regulations. The discharge
location should be away from pedestrian walkways and window openings
and should be well above the average human breathing height for the area.
Regular ozone checks should be carried out every three months using an
ozone meter. Recommended levels of ozone in the atmosphere of a factory
should not exceed 0.1 parts per million (PPM). This level is easily
obtainable if factory recommended exhaust rates are followed.
Ozone has a very distinct, strong odor even at low levels. Immediate ozone
checks should be made if an operator can smell ozone. Most people can
smell ozone at about one third the maximum allowable 0.1 PPM level.
Ozone exposure will cause headaches and fatigue. It will also irritate the
mouth and throat. Overexposure can lead to respiratory infections.
If ozone is detected,
1. Shut down the UV system.
2. Check exhaust ducting for leaks.
3. Check the operator working area with an ozone meter.
If a person is overcome by ozone,
S Move the individual to a warm uncontaminated atmosphere and loosen
tight clothing at the neck and waist.
S Keep the individual at rest.
S If the person has difficulty breathing, oxygen may be administered
provided that suitable apparatus and a trained operator are available.
S If breathing is weak or has ceased, artificial respiration should be
started.
S Seek medical assistance.
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