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GEMÜ 539
15 Inspection and maintenance
15.4.1 Mounting actuator DN 15 - DN 50
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 ).
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This rotates the actuator clockwise approx. 90° to the
desired position.
Nominal size
Torque
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.
15.4.2 Mounting actuator DN 65 - DN 100
1. Move the actuator
A
to the open position.
2. Insert new sealing washer
30
in valve body flange.
3. Place actuator
A
and seat flange
f
on valve body
1
.
4. Tighten the hexagon nuts
6
diagonally.
Nominal size
Torque
DN 65
200 Nm
DN 80
200 Nm
DN 100
200 Nm
5. Move the actuator
A
to the closed position.
6. With the valve fully assembled, check the function and
tightness.
