Samson 3271-5, Mounting And Operating Instructions

Page: 41 / 52

EB 8310-1 EN 41
Maintenance
Malfunction due to loosened nut.
The nut (A9) on the actuator stem serves to
adjust the dimension a. Do not undo the nut
(A9). If the nut has come undone, readjust
the dimension a according to Table 2 on
page 42..
6. Remove the diaphragm plate (A5.1), di-
aphragm (A4), and diaphragm plate
(A5.2) from the actuator stem (A7).
7. Place the new diaphragm on the dia-
phragm plate (A5.2). Place on the other
diaphragm plate (A5.1).
8. Check the sealing element of the collar
nut (A15). If necessary, renew it (order
no. 8353-0533).
9. Check whether the springs (A10) rest
correctly in the bottom diaphragm case
(A2).
10. Apply a suitable lubricant to the actuator
stem (A7).
11. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), dia-
phragm (A4), and diaphragm plate
(A5.2) in the bottom diaphragm case
(A2).
12. Tighten the collar nut (A15).
13. Place on the top diaphragm case (A1).
14. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20).
15. Mount the actuator on the valve (see sec-
tion 5.1).
7.2 Replacing the actuator
stem seals
We recommend to also replace the dia-
phragm on replacing the actuator stem seal.
See section 7.1.
Version with fail-safe action "actuator stem
extends" (FA)
1. Lift the actuator off the valve. See sec-
tion 9.2.
2. Unscrew the nuts (A21) and bolts (A20)
on the diaphragm case.
3. Lift off the top diaphragm case (A1) and
remove springs (A10).
4. Pull the actuator stem (A7) together with
the diaphragm plate (A5.1), diaphragm
(A4), and diaphragm plate (A5.2) out of
the bottom diaphragm case (A2).
5. Remove the radial shaft seal (A40).
6. Apply a suitable lubricant to the new ra-
dial shaft seal.
7. Use a suitable tool to mount the radial
shaft seal.
8. Renew the dry bearing (A42) and wiper
(A41), if necessary.
9. Apply a suitable lubricant to the actuator
stem (A7).
10. Place the actuator stem (A7) together
with the diaphragm plate (A5.1), dia-
phragm (A4), and diaphragm plate
(A5.2) in the bottom diaphragm case
(A2).
NOTICE
!
Tip