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Dirt Trap - Type: DN25 - DN100 / PN10
Operating Instructions
23
9. Maintenance / Cleaning
CAUTION
The
maintenance and cleaning
section is intended for specialists only. Main-
tenance, cleaning and repair work may only be carried out by skilled specialist
personnel.
Periodical cleaning and maintenance of the dirt trap is essential to permit the valve to operate without
trouble.
CAUTION
Should questions or uncertainty arise in the course of maintenance, please
contact Armaturenwerk Hötensleben GmbH.
NOTE
Maintenance / cleaning procedures of the individual bought-out components can
be taken from the assembly instructions of the respective manufacturers.
WARNING
Prior to cleaning, maintenance or repair work (to be carried out by skilled personnel
only), it is essential that the shutdown procedure (see section 5.4) be pursued.
If the indicated measures do not succeed, please consult the manufacturer of the
plant or Armaturenwerk Hötensleben GmbH.
The insert is designed to be cleaned in the removed condition.
Cleaning fluids:
3 % nitric acid
max. 60°C
3 % caustic-soda solution
max. 80°C
Make sure to
- Clean and chlorine-free water is used.
- Dose carefully and avoid overly strong concentrations of cleaning agent.
- The dirt trap is rinsed with ample clean water once cleaning is completed.
CAUTION
Make sure that cleaning agents are stored in compliance with relevant safety
codes. Care should be exercised when handling cleaning agents to ensure that
the safety instructions given on the safety datasheets issued by the cleaning-
agent manufacturers are followed.
Wearing rubber gloves and safety goggles is an essential requirement
to be met when performing cleaning work.
Caution must be used not to touch the dirt trap or the piping when hot fluids are
being processed or handled or while the sterilisation process is in progress.