Replacing The Seals; Mounting The Actuator - GEM 533 eSyStep Operating Instructions Manual

14 Inspection and maintenance

14.3 Replacing the seals

1. Remove 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 dur-
ing cleaning).
5. Insert new seat seal 14.
6. Remove 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.
10. Mount the actuator.

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.
Nominal size
DN 15
DN 20
DN 25
DN 32
DN 40
DN 50
5. Move the actuator A to the closed position.
6. With the valve fully assembled, check the function and
tightness.
7. Carry out initialisation.
GEMÜ 533
Positioner (Code S0)
Torque
90 Nm
100 Nm
120 Nm
120 Nm
150 Nm
200 Nm
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