Samson 3271-5, Монтаж и эксплуатация

Страница: 40 / 52

40 EB 8310-1 EN
Maintenance
7.1 Replacing the diaphragm
We recommend to also replace the actuator
stem seal on replacing the diaphragm. See
section 7.2.
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. Unscrew the collar nut (A15).
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. 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).
11. Tighten the collar nut (A15).
12. Place the springs (A10) in the bottom di-
aphragm case, centering them in the in-
tended recesses.
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).
Version with fail-safe action "actuator stem
retracts" (FE)
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).
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. Unscrew the collar nut (A15).
Tip
NOTICE
!