EB 3135-1 EN
39
Servicing
7.1
Replacing the electric
actuator
Î
See Fig. 3
The electric actuator can be replaced while
the process is running or after a plant shut-
down.
The mounting procedure is described in the
associated mounting and operating instruc-
tions of the electric actuator.
Observe the relevant safety regulations on
mounting or removing the electric actuator.
Before removing the electric actuator from
the valve, disconnect the supply voltage
and protect it against inadvertent reconnec-
tion.
Refer to the mounting and operating instruc-
tions of the electric actuator for more details.
See information under ‘Referenced docu-
WARNING
!
WARNING
!
Note
The actuator stem of electric actuators with
fail-safe action must be retracted before
mounting or removing the electric actuator.
Refer to the mounting and operating instruc-
tions of the electric actuator with fail-safe ac-
tion for more details. See information under
‘Referenced documentation’ on page 7.
Removing the electric actuator
The procedure described below refers to
electric actuators without fail-safe action.
1. Disconnect the supply voltage from the
electric actuator (see information under
‘Referenced documentation’ on
2. Unscrew the coupling nut (10.2). Remove
the electric actuator (10) from the con-
necting piece (8) of the valve.
Mounting the electric actuator
The procedure described below refers to
electric actuators without fail-safe action.
1. Place the electric actuator (10) onto the
connecting piece (8) of the valve and fas-
ten with the coupling nut (10.2). Observe
the tightening torques specified in sec
-
2. Connect the supply voltage to the electric
actuator (see information under ‘Refer-
enced documentation’ on page 7).
Note
