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14 Inspection and maintenance
14.3 Replacing the seals
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").
GEMÜ 529 eSyLite
NOTICE
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
DN 10
DN 15
DN 20
DN 25
DN 32
DN 40
DN 50
DN 65
DN 80
5. Move the actuator A to the closed position.
6. With the valve fully assembled, check the function and
tightness.
32 / 37
Torque
90 Nm
90 Nm
100 Nm
120 Nm
120 Nm
150 Nm
200 Nm
260 Nm
280 Nm
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