www.gemu-group.com
57 / 64
GEMÜ 543
Positioner (Code S0)
14.3 Replacing the seals
1. Remove the actuator (see “Removing the actuator“,
2. Remove sealing washer
4
from the valve body.
3. Loosen nut
e
on spindle
b
(hold spindle
b
with appropriate
tool that will not damage the spindle surfaces).
4. Clean all parts of contamination (do not damage parts
during cleaning).
5. Insert new seat seal
14
.
6. Insert retaining washer
d
.
7. Apply appropriate thread locking compound on the thread
of spindle
b
.
8. Fix spindle
b
in place with nut
e
(hold spindle
b
in place
with appropriate tools which do not damage the spindle
surfaces).
9. Insert new sealing washer
4
in valve body
1
.
Mount the actuator (see “Mounting the actuator“, page 57).
14.4 Mounting the actuator
1. Move the actuator
A
to the open position.
2. Lubricate the thread of the union nut
a
using a suitable
lubricant.
3. Place actuator
A
on valve body
1
approx. 90° in front of
the end position (orientation of the connections) and
screw hand tight with union nut
a
.
4. Tighten union nut
a
with an open-end wrench (for
torques, see table ).
ð
This rotates the actuator clockwise approx. 90° to the
desired position.
Actuator size 0A
Nominal size
Torque
DN 10
90 Nm
DN 15
90 Nm
DN 20
100 Nm
DN 25
120 Nm
5. Move the actuator
A
to the closed position.
6. With the valve fully assembled, check the function and
tightness.
7. Carry out initialisation.
14 Inspection and maintenance
