Troubleshooting Help - Mankenberg VV Serie Originalbetriebsanleitung

Original operating manual
Vacuum breaker VV

11 Troubleshooting help

Be sure to observe section Safety instructions [} 6] when rectifying faults.
Spare parts must be ordered with all the details on the nameplate. Only original parts from the manufacturer
MANKENBERG may be installed.
MANKENBERG experts are available to help in rectifying faults as quickly as possible. See section Further
information [} 16] for the addresses.
If functional or corrosion damage is detected during maintenance or after a fault:
consult MANKENBERG to find out whether a more suitable fitting is available or whether the
damaged part can be supplied in a better-suited material.
note
Type of fault
Leakage at a
connection body parts
(flange, threaded pin or
clamp ring):
reseal connection
Functional fault
leakage at the seat
clean functional parts
VV-4.X.22.3 Issue 01.09.2022
Action
Retighten housing/flange connection and clamp ring screws (clockwise)
To prevent any risk for operating personnel, make sure that this repair measure is
only carried out when the pipeline section is not under pressu- re. Take note of
section Special hazards [} 6] and then section Installation [} 8].
Cut off system immediately and/or remove pressure.
A foreign object may be jammed in the seat and be preventing proper sealing:
Slacken spring: Rotate adjusting screw anticlockwise (viewed from above) so that
the vacuum breaker can open:
the foreign body should be flushed away.
If the functional fault cannot be rectified in this way:
The vacuum breaker must be disassembled and cleaned.
To prevent any risk for operating personnel, make sure that this repair measure is
only carried out on a system that is not under pressure. Take note of section
Special hazards [} 6].
When the vessel is pressureless, dismount the vacuum breaker and disassemble
and clean the functional parts. Here all parts of the maintenance set should be
renewed. Then reassemble the readjust fitting. When reinstalling, regard Section
Installation [} 8] and readjust as described in section Initial start-up [} 11].
danger of fatalities
danger of fatalities
14
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