Replacing The Actuator - Samson 41-73 Mounting And Operating Instructions

9.3.1

Replacing the actuator

Î See 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. 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 2517 EN
Mounting the actuator
1. Diaphragm actuator DN 15 to 100
Insert the actuator stem (11) through the
hole in the crossbeam onto the spigots of
the actuator bellows (5.1). Tighten the
nuts (9). Observe the specified tightening
torques (see 'Tightening torques' in An-
nex).
− Bellows actuator DN 15 to 50
Push the actuator stem (11) onto the
spigots of the actuator bellows (5.1).
Tighten the nuts (9).
Align actuator on the pillars (8.1) and
fasten it with the nuts (8.2). Observe the
specified tightening torques (see 'Tighten-
ing torques' in 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.
Push the actuator stem (11) onto the
spigots of the actuator bellows (5.1).
Tighten the nuts (9).
Fasten the pillars (8.1) with the nuts (8.2)
onto the valve flange. Observe the speci-
fied tightening torques (see 'Tightening
torques' in Annex).
2. Screw on the control line (17). Observe
the specified tightening torques (see
'Tightening torques' in Annex).
3. Put the regulator back into operation (see
the 'Start-up' section).
Servicing
9-5