Replacing The Actuator - Samson 41-23 Mounting And Operating Instructions

9.3.1

Replacing the actuator

Î Refer to Fig. 9-1
Removing the actuator
1. Put the regulator out of operation (see
the 'Decommissioning' section).
2. Unscrew the control line (17).
3. Completely relieve the tension from the
set point springs (7) by turning the set
point adjuster (6) counterclockwise ().
WARNING WARNING
! !
Stored energy in the set point springs can
cause components to move in an uncon-
trolled manner resulting in injury to hands or
fingers.
4. Unlock the cotter pin (20) on the travel
stop cap.
5. Diaphragm actuator DN 15 to 100
Unscrew the nuts (9) from the actuator
and remove the actuator.
− Bellows actuator DN 15 to 50
Unscrew the nuts (8.2) from the actuator
and remove the actuator.
− Bellows actuator DN 65 to 100
Unscrew the nuts (8.2) on the pillars
(8.1).
Unscrew the pillars (8.1) out of the
threaded holes (8.3) of the actuator
flange and remove the actuator.
EB 2512 EN
Mounting the actuator
1. Diaphragm actuator DN 15 to 100
Insert the actuator stem (11) through the
hole in the crossbeam (8) into the travel
stop cap with cotter pin (20) and fasten
the actuator with the nuts (9). Observe
the tightening torques specified in the the
Annex.
− Bellows actuator DN 15 to 50
Insert the actuator stem (11) into the trav-
el stop cap with cotter pin (20).
Align actuator on the pillars (8.1) and
fasten it with the nuts (8.2). Observe the
tightening torques specified in the the
Annex.
− Bellows actuator DN 65 to 100
Screw the pillars (8.1) into the threaded
holes (8.3) of the actuator flange as far
as they will go.
Insert the actuator stem (11) into the trav-
el stop cap with cotter pin (20).
Fasten the pillars (8.1) with the nuts (8.2)
onto the valve flange. Observe the tight-
ening torques specified in the the Annex.
2. Lock the cotter pin (20) on the travel stop
cap.
3. Screw on the control line (17). Observe
the tightening torques specified in the the
Annex.
4. Put the regulator into operation (see the
'Operation' section).
Servicing
9-5