ATEX Retractor System TANKO-RT/-RTS
3 Design and Function
Translation - Operating/installation instructions 2020/01
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Remark on the Cleaning Process
The result of a cleaning process with the device, like all other cleaning processes, depends on several
parameters. According to the “Sinner's Circle”, the four most important parameters for cleaning are:
–
Chemicals (cleaning medium, plus the product and its concentration)
–
Mechanical system (removal of dirt, establishment of contact with the cleaning medium)
–
Temperature and
–
Time (reaction time of the cleaning medium and duration of the cleaning process).
All four factors are mutually dependent and variable in their size.
The desired cleaning result can only be achieved with a well-balanced combination of pressure, flow
rate, reaction time, temperature and cleaning medium.
3.2.1
Emergency Stop
NOTE
Risk of damage to the device from collision of moving parts!
When the power cylinder is retracted into the housing and the cylinder continues to move
to its end position after a power failure or emergency stop, there will be a collision
between the bolt on the seal carrier and the locking bolt.
This results in damage to the safety-relevant parts.
The power cylinder must stop in position immediately in case of a power failure or
emergency stop during the cleaning process and must not move to its end position.
We recommend a control-system solution that fulfills the valve function of a 5/3-way
valve with a blocked middle position.
When the air pressure falls, the locking cylinder goes into locking position via spring control.
After an emergency stop or power failure with a fall in air pressure, when restarting the plant, the
locking cylinder must first be supplied with compressed air (i.e. it must be unlocked, before the power
cylinder may move to its end position).