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687
5.1 Disassembly of actuator
WARNING
Actuator top 10 is under spring
pressure!
®
Risk of severe injury or death!
G
Only open the actuator under a press.
1. Separate actuator from control medium.
®
The actuator is in the open position.
2. Remove sealing plug
25
from actuator
top
10
.
3. Remove
O-ring
44
from actuator top
10
.
4. Remove loose compressor
3
.
5. Remove protective caps
29
.
6. Diaphragm size 50:
Remove protective caps
34
.
7. Clamp actuator in a press.
CAUTION
Applied pressure too high!
®
Risk of breakage of actuator
top
10
!
G
Only use minimum required
pressure.
8. Diaphragm sizes 25 and 40:
Undo and remove bolts
12
between
actuator top
10
and actuator base
16
.
Diaphragm size 50:
Undo and remove bolts
12
and nuts
35
between actuator top
10
and actuator
base
16.
9. Slowly release the press.
10. Remove actuator top
10
.
Important:
After disassembly, clean all parts
of contamination (do not damage
parts). Check parts for potential
damage, replace if necessary (only
use genuine parts from GEMÜ).
5.2 Replacement of spare parts
1. Disassemble actuator as described in
chapter 5.1, points 1-10.
2. Pull out actuator membrane assembly
manually upwards from actuator
base
16
. The actuator membrane
assembly comprises actuator
spindle
15
including dowel pin
30
and
adapter
31
, hexagon nut
21
, washer
9
,
upper membrane plate
6
, upper sealing
washer
22
, actuator membrane
14
,
lower sealing washer
22
, distance
piece
28
(only for diaphragm sizes 40
and 50), O-ring
27
(only for diaphragm
sizes 40 and 50) and lower membrane
plate
6
.
3. Fix actuator spindle
15
.
CAUTION
Damage to the actuator spindle 15
when using unsuitable tools!
®
Damaged actuator spindle
15
can
no longer ful
fi
l its function.
G
Clamp actuator spindle
15
in a
vice with soft clamping jaws or
hold it with an appropriate tool
that will not damage the spindle
surfaces.
4. Remove hexagon nut
21
with open-end
wrench SW13.
5. Remove
washer
9
.
6. Remove upper membrane plate
6
.
7. Remove upper sealing washer
22
.
8. Remove actuator membrane
14
.
9. Remove lower sealing washer
22
.
10. Diaphragm sizes 40 and 50:
Remove distance piece
28
.
11. Diaphragm size 40: Remove O-rings
27
.
Diaphragm size 50: Remove O-ring
27
.
12. Diaphragm size 40:
Insert new O-rings
27
.
Diaphragm size 50:
Insert new O-ring
27
.
13. Diaphragm sizes 40 and 50:
Insert distance piece
28
.
14. Insert new lower sealing washer
22
.
15. Insert new actuator membrane
14
.
The installation position is optional.
Summary of Contents for 687
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