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Cleaning and maintenance
Manual stem locking
Type 2371-11
See Stem locking for CIP or SIP on page
8.
How to proceed:
1. Remove the blanking plug and screw the
pin (13) of the stem locking with the lock
nut (14) into the adjustment opening.
− The end of the pin comes to rest on the
head of the set point screw and keeps the
plug in the open position. A mechanical
stop prevents it from being screwed in
any further, protecting the diaphragm
from being overloaded.
2. Use the lock nut (14) to keep this posi-
tion.
− When the groove of the pin is completely
concealed, the stem locking is active.
− A visible groove means it is disengaged.
− The control function of the valve is not af-
fected when the stem locking is disen-
gaged.
16
13
14
6
8
Manual stem locking · Type 2371-11
6
Set point screw
7
Set point springs
8
Actuator housing of Type 2371-11
13
Pin
14
Lock nut
Fig. 6: Manual stem locking
7
EB 2640 EN
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