2.3. Operating conditions
For the proper use of the rotation cleaner, the observance of the fol-
lowing conditions is essential, with non-observance carrying the
threat of severe injury.
The avoidance of ignition sources, that are caused by the cleaning process,
such as, for example, hazardous electrostatic charges from the spraying of
liquids, lies within the operator’s range of responsibility. (TRGS 727)
The rotation cleaner must be subject to local equipotential bonding. All
conductive parts must be permanently earthed or connected to other
conductive parts. The leakage resistance must be lower than 106Ω.
After exchange of the rotation cleaner or the mounting for the supporting pipe
(lance), the leakage resistance must be measured and a value of 106Ω must
not be exceeded.
The minimum conductivity value of the cleaning agent must not be below
1,000 pS/m, measured in accordance with DIN 50412.
The cleaning agent, used for operating the rotation cleaner, must attain at
most 80% of its ignition temperature, whose maximum value is 97°C!
If the rotation cleaner is operated in a dust explosive atmosphere, then a
maximum of 2/3 of the minimum ignitiontemperature of the dust cloud should
ever be attained.
The rotation cleaner should be operated with a 500µm prefilter.
Rotation cleaners should not be used for the cleaning of containers in which
explosive atmospheres of ignition group IIC are situated.
Cleaning agents other than water, e.g. hydrocarbon containing solvents, are
only permissible, if the cleaning agents do not contain more than 1% fluid
content, which may build to a second phase. Operating pressure in this case
must be lower than 50 bar, the fluid throughput per cleaning agent <60 L/min
and the container diameter must be a maximum of 3m.
The rotation cleaner must not be powered by gas or steam, as otherwise a
hazardous electrostatic charge within the rotation cleaner can potentially
arise. In order to exclude operation with gas also with the start-up of the
pump, the shut-off device should be situated directly before the rotation
cleaner. The piping volume between the shut-off device and the rotation
cleaner should be as small as possible. All piping should be ventilated.
When installing the rotation cleaner inside a container, e.g. a tank, it should
be observed that the distance of the rotation cleaner to the wall of the
container or fittings is sufficient, so that any contact may be excluded.
