Atex Version; Removing The Butterfl Y Valve From The Piping; Replacing The Operator; 14.4.1 Disassembling The Operator - Gemü 490 Original Einbau- Und Montageanleitung

14.2

ATEX version

1. Perform inspection and servicing , see
chapter 14.1 "Standard version".
2. Check resistance at least once a year.
14.3 Removing the butterfl y valve
from the piping
WARNING
The equipment is subject to pressure!
® Risk of severe injury or death!
Only work on depressurized plant.
G
WARNING
Corrosive chemicals!
® Risk of caustic burns!
Wear appropriate protective
G
gear when installing.
CAUTION
Hot plant components!
® Risk of burns!
Only work on plant that has
G
cooled down.
1. Installation work must only be performed
by trained personnel.
2. Use appropriate protective gear as
specifi ed in plant operator's guidelines.
3. Move the butterfl y valve to a slightly
open position. The disc must not project
from the body.
4. Loosen and remove fl ange bolts and
nuts.
5. Spread the piping fl anges.
6. Remove the butterfl y valve.
14.4

Replacing the operator

For information on the operator
assembly refer to the assembly
instructions included separately.
The following tools are required for
replacing the operator:
 Allen key
 Wrench or open-end wrench
Tightening torque:
Bolt size
M5
M6
M8
M10
M12
M14
M16
M20
M24

14.4.1 Disassembling the operator

1. Depressurize and drain the plant or plant
component.
2. Pneumatic operator: Depressurize
control medium.
3. Pneumatic operator: Remove the control
medium line(s) from the operator.
4. Motorized operator: Disconnect the
operator from the power supply.
5. Motorized operator: Disconnect the
electrical connections according to the
enclosed instructions.
6. Loosen bolts 2 and remove them with
lock washer(s) / spring washer(s) 3.
7. Pull up the operator.
® The operator is now disassembled.
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Tightening torque
5-6 Nm
10-11 Nm
23-25 Nm
48-52 Nm
82-86 Nm
132-138 Nm
200-210 Nm
390-410 Nm
675-705 Nm
3
2
490