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GEMÜ 519 eSyLite
14 Inspection and maintenance
14.3 Replacing the seals
NOTICE
Sealing washer!
●
Replace sealing washer
4
each time the actuator is disas-
sembled/assembled.
1. Remove actuator
A
(see chapter "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. Remove seat seal
14
.
5. Clean all parts; do not scratch or damage the parts during
cleaning.
6. Insert new seat seal
14
.
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
.
10. Mount actuator
A
(see chapter "Mounting the actuator").
14.4 Mounting the actuator
1. Move the actuator
A
to the open position.
2. Lubricate the thread of union nut
a
using a suitable lubric-
ant.
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 sizes 1A and 3A
Nominal size
Torque
DN 10
90 Nm
DN 15
90 Nm
DN 20
100 Nm
DN 25
120 Nm
DN 32
120 Nm
DN 40
150 Nm
DN 50
200 Nm
5. Move the actuator
A
to the closed position.
6. With the valve fully assembled, check the function and
tightness.
