Samson EB 20b, Монтаж и эксплуатация

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9-2
EB 20b_EN
February 2022 edition
Subject to technical changes
Servicing
Test
Measures in the case of a negative
test result
Check the rotary movement of
the actuator- and switching
shaft for smooth movement. If the actuator- and switching shaft
are blocked, remove the blockage.
WARNING! If the actuator- and
switching shaft are blocked (e.g. due
to “seizure” if not actuated for a long
period of time) they can release un-
expectedly and move uncontrolled.
This can lead to crushing if reaching
into them.
Before trying to release a blockage of
the actuator- and switching shaft, in-
terrupt and lock the pneumatic ener-
gy and the control signal. Release the
residual energy of the actuator
(spring tension or compressed air
reservoir) before releasing the block-
age, see the corresponding actuator
documentation.
If possible, check the fail-safe
position of the ball valve by
brie
fl y interrupting the power
supply.
Decommission the ball valve, see
chapter “10 Decommissioning”. Then
determine the cause and remedy it,
see Chapter “8 Malfunctions“.
Check pipe connections and
seals of the ball valve and actu-
ator for leaks. Regular maintenance work on the
ball valve is not necessary, but when
checking the pipe section, no medi-
um may escape from the
fl ange and
screw connections of the body or
from the switching shaft sealing.
9.2 Maintenance work
Ö
The ball valve must be prepared before all maintenance
work, see Chapter 12 “Repairs”.
Ö
After all maintenance work, the ball valve must be checked
prior to recommissioning, see Chapter “5.5 Checking the
mounted ball valve”.
9.2.1 Replacing the seal rings and ball
Ö
Check the condition of the ball and seal rings.
Ö
Remove the seal rings (4) as described in Chapter “12.3 Re-
placing the seal rings and ball”. Check the seal rings as well
as all plastic parts for damage and if in doubt replace them.
Ö
Also remove the ball (3). Check the ball as well as all plastic
parts for damage and if in doubt replace them.
9.3 Ordering spare parts and consumables
Information about spare parts, lubricants and tools can be re-
ceived from the After Sales Service at PFEIFFER.
Spare parts
Information on spare parts can be found in Chapter “15.2 Spare
parts“.