EB 8310-5 EN
39
Servicing
3. Relieve the spring compression of actua-
tors with preloaded springs (see sec-
tion 9.3).
4. Lift off the top diaphragm case (A1).
5. Pull the diaphragm plate assembly con-
sisting of the actuator stem (A7), dia-
phragm plate (A5), and diaphragm (A4)
out of the bottom diaphragm case (A2).
6. Use a suitable punch to remove the radi-
al shaft seal.
7. Apply a suitable sealant and lubricant to
the new radial shaft seal (A40).
8. Use a suitable mandrel to mount the ra-
dial shaft seal.
9. Renew the dry bearing (A42) and wiper
(A41), if necessary.
10. Apply a suitable lubricant to the actuator
stem (A7).
11. Place the diaphragm plate assembly con-
sisting of the actuator stem (A7), dia-
phragm plate (A5), and diaphragm (A4)
into the bottom diaphragm case (A2).
Make sure that the sealing elements are
not damaged.
12. Place on the top diaphragm case (A1).
Ensure that the compressed air connec-
tions on the cases (A1, A2) are correctly
aligned with each other.
13. If necessary, preload the springs (see
section 5.2).
14. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20). Tighten the nuts
evenly. Observe tightening torques.
15. Mount the actuator on the valve (see sec-
tion 5.1).
7.3 Preparation for return ship-
ment
Defective actuators can be returned to
SAMSON for repair.
Proceed as follows to return valves to
SAMSON:
1. Put the control valve out of operation.
See associated valve documentation.
2. Remove the actuator from the valve (see
section 9.2).
3. If necessary, relieve the spring compres-
sion (see section 9.3).
4. Send the actuator to your nearest
SAMSON subsidiary. SAMSON
subsidiaries are listed on our website at
u
www.samson.de > Contact.
7.4 Ordering spare parts and
operating supplies
Contact your nearest SAMSON subsidiary
or the SAMSON After-sales Service depart-
ment for information on spare parts, lubri-
cants, and tools.
Spare parts
See section 10.2 for details on spare parts.
Lubricant
Details on suitable lubricants can be found in
the document
u
AB 0100.
Tools
Details on suitable tools can be found in the
document
u
AB 0100.
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