GEM 543 eSyStep Operating Instructions Manual page 57

14.3 Replacing the seals
1. Remove the actuator (see "Removing the actuator",
page 56).
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
DN 10
DN 15
DN 20
DN 25
5. Move the actuator A to the closed position.
6. With the valve fully assembled, check the function and
tightness.
7. Carry out initialisation.
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Torque
90 Nm
90 Nm
100 Nm
120 Nm
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14 Inspection and maintenance
GEMÜ 543
Positioner (Code S0)