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16 Inspection/maintenance
The equipment is subject to pressure!
▶ Risk of severe injury or death.
Depressurize the plant.
●
Completely drain the plant.
●
Hot plant components!
▶ Risk of burns.
Only work on plant that has cooled
●
down.
Servicing and maintenance work must only be performed
●
by trained personnel.
Do not extend hand lever. GEMÜ shall assume no liability
●
whatsoever for damages caused by improper handling or
third-party actions.
In case of doubt, contact GEMÜ prior to commissioning.
●
1. Use appropriate protective gear as specified in plant oper-
ator's guidelines.
2. Shut off plant or plant component.
3. Secure against recommissioning.
4. Depressurize the plant or plant component.
Ball valves are maintenance-free. No lubrication or routine
maintenance of the ball valve shaft is required. The shaft is
guided through a PTFE gland packing in the ball valve body.
The shaft seal is pretensioned and self-adjusting. However,
the operator must carry out regular visual examinations of the
ball valves, dependent on the operating conditions and the po-
tential danger in order to prevent leakage and damage.
If there is a leakage at the spindle nut, this can generally be
rectified by retightening the spindle nut. However, overtighten-
ing the spindle nut must be avoided.
Usually, retightening by between 30° and 60° will be sufficient
to rectify the leakage.
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WARNING
CAUTION
CAUTION
16.1 General information regarding actuator
replacement
The following tools are required for actuator replacement:
Allen key
●
1. Check the position of the ball indicated by the groove SZ
and compare with position indicator, rotate ball valve to
correct position if necessary.
ð Groove transverse to piping direction:
Ball valve closed.
ð Groove in piping direction:
Ball valve open.
16.1.1 Replacing the actuator
1. Depressurize the control medium.
2. Unscrew the control medium line(s) on the actuator.
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16 Inspection/maintenance
NOTICE
SZ
GEMÜ B44
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