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17 Inspection/maintenance
17 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.
17.1 General information regarding actuator
replacement
The following tools are required for actuator replacement:
Allen key
●
GEMÜ B52
WARNING
CAUTION
CAUTION
NOTICE
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.
▶ For flanged bodies, the hand lever is fitted offset by 90°.
17.1.1 Replacing the actuator
Risk of electric shock!
▶ Risk of injury or death (if operating
▶ Adjustments are made with the actu-
▶ Electric shock can cause severe burns
●
●
44 / 55
SZ
NOTICE
DANGER
voltage is higher than safe extra low
voltage).
ator cover removed.
and fatal injury.
Always disconnect the product from
power supply!
Therefore, have all work performed
only by qualified electricians.
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