Exchanging The Operating Diaphragm Unit In The Actuator; Version Without Manual Adjuster - Samson 45-1 Mounting And Operating Instructions

Servicing
9.5 Exchanging the operating
diaphragm unit in the actu-
ator
See Fig. 9-1 and Fig. 9-2.
Tip
The associated order number is written on
the actual operating diaphragm.
9.5.1 Version without manual
adjuster
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.
Removing the operating diaphragm unit
1. Put the regulator out of operation (see
the 'Decommissioning' chapter).
2. Additional step for Type 45-4 and
Type 45-2: completely relieve the tension
from the set point spring (10) by turning
counterclockwise ().
3. Unscrew the control lines (11, 12).
4. Remove the regulator from the pipeline.
5. Remove the bolts (14).
6. Lift off the actuator housing (7) with actu-
ator stem (6.1) and set point springs.
7. Pull the valve spring (8.1), if installed,
out of the body.
9-6
8. Clamp the actuator housing (7) with ac-
tuator stem (6.1) and set point springs
into a vise.
9. Unscrew the nut (5) and lift off the top di-
aphragm plate (4).
10. Note which side of the damaged operat-
ing diaphragm (6) is the pressurized side
and remove the diaphragm.
Installing the operating diaphragm unit
1. Place the new operating diaphragm (6)
with pressurized side on the bottom dia-
phragm plate (4).
2. Place on the top diaphragm plate (4)
and mount the nut (5). Observe the spec-
ified tightening torques (see section
'Tightening torques' in the Appendix).
3. Insert the valve spring (8.1), if installed,
into the body.
4. Place on the actuator housing (7) with
actuator stem (6.1) and set point springs
and tighten the screws (14) evenly. Ob-
serve the specified tightening torques
(see section 'Tightening torques' in the
Appendix).
5. Install the regulator into the pipeline.
6. Fasten the control lines (11, 12). Ob-
serve the specified tightening torques
(see section 'Tightening torques' in the
Appendix).
7. Put the regulator back into operation (see
the 'Start-up' chapter).
EB 3124 EN