Maintenance - Mankenberg DM Originalbetriebsanleitung

Original operating manual
Pilot-controlled pressure regulators DM

10 Maintenance

The automatic function of the fitting requires maintenance to ensure that it continues to operate perfectly. It is
important for maintenance work to take place in a planned manner at periodic intervals.
The maintenance plan is a recommendation by the manufacturer MANKENBERG, which should be
supplemented by practical experience gained by the user under the prevailing operating conditions.
MANKENBERG shall assume no liability resulting from improper maintenance and/or repairs.
Sample plan for maintenance work
Type of maintenance
Check function
Function / check free
movement of the
spindle
Check seal on the
body, the pipe
connection and the
control lines
Grease sliding points
Monitor exposed
spring
If installed upstream of
the fitting:
clean strainer
Preventive
maintenance
Check safety valve
1)
See comment at the beginning of this section: The time intervals are guides which should be adapted to
match the prevailing operating conditions, the properties of the medium in the system and the user's
experience.
2)
Caution danger of crushing: shut down the valve for cleaning purposes!
3)
Request maintenance set and replacement instructions from MANKENBERG.
DM-4.X.222 Issue 18.07.2022
Work to be performed
Check whether function is fulfilled as per section Intended
use [} 4].
With a non-rising adjusting screw (without counternut),
cone movement in the valve seat can be detected by
checking the movement of the adjusting screw.
Visual inspection
Grease external sliding points with a corrosion-protection
lubricant
Visual inspection: if necessary, remove any dirt/corrosion
According to the manufacturer's instructions
Dismantle fitting, see Section Troubleshooting help
[} 17].
Visual inspection diaphragm and functional parts
Replace all parts of the maintenance set 3)
According to the manufacturer's instructions
16
1)
Period
at least 1x per
week
at least 2x per year
at least 1x per
month
at least 4x per year
2)
at least 2x per year
Depends on the
contamination of
the medium
at least 1x per year
at least 1x per year
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