Maintenance - Mankenberg VV Serie Originalbetriebsanleitung

Original operating manual
Vacuum breaker VV

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
with soft packing
(VV 34, VV36):
actuate taper spindle
mechanically
Check seals on the
body and the pipe
connection
Monitor open bonnet
If installed upstream
of the fitting:
clean strainer
Preventive
maintenance
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.
During maintenance work (apart from visual inspections) the relevant recommendations and
warning notes in section Troubleshooting help [} 14] should be observed.
danger
Failure to observe this warning may mean danger to life and limb and may cause
damage to the pipeline system and to the fitting.
When a fitting that has previously been dismantled is being put back into service, the fitting should be checked
for proper sealing capacity and function as well as correct adjustment of the adjusting and functional
components!
VV-4.X.22.3 Issue 01.09.2022
Work to be performed
Check whether function is fulfilled as per section Intended use [} 4]
The soft packing tends to sticking to the seat.
Make valve pressureless and release spring.
Press taper spindle down (done with a screw driver through the
lateral borehole at VV 34)
Visual inspection
Visual inspection:
if necessary, remove any dirt/corrosion
According to the manufacturer's instructions
Dismantle fitting, see Section Troubleshooting help [} 14].
Sichtkontrolle und Funktionsteile
Alle Teile des Wartungssatzes ersetzen
2)
3)
13
1)
Period
at least 1x
per week
at least 1x
per week
at least 1x
per month
at least 2x
per year
Depends on
the
contaminati
on of the
medium
at least 1x
per year
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