
3
Maintenance
Danger .................................................................................................................................................17
Replacing stuffing box PA 46, PA 47 ......................................................................................................18
Replacing stuffing box, valve seat and valve plug PA 46, PA 47 .............................................................19
Replacing stuffing box MPA 46, MPA 47 ................................................................................................20
Replacing stuffing box, valve seat and valve plug MPA 46, MPA 47 .......................................................21
Retightening stuffing box ......................................................................................................................22
Replacing control membrane in diaphragm actuator MPA 46, MPA 47 ...................................................22
Torques ................................................................................................................................................23
Tools .....................................................................................................................................................23
Single parts of stuffing box, valve plug, valve seat .................................................................................24
Mounting/removing valve seat ..............................................................................................................25
Mounting/removing control membrane .................................................................................................26
Key .......................................................................................................................................................27
Retrofitting
Danger .................................................................................................................................................27
Mounting diaphragm actuator ...............................................................................................................27
Mounting forkhead................................................................................................................................28
Tools .....................................................................................................................................................28
Torques ................................................................................................................................................28
Contents continued
Page
Spare Parts
Spare parts list .....................................................................................................................................29
Parts for retrofitting
List of parts for retrofitting ....................................................................................................................30
Annex
Declaration of Conformity .....................................................................................................................31
Emergency operation MPA 46, MPA 47
Danger .................................................................................................................................................17
Fit hand lever for emergency operation .................................................................................................17
Decommissioning
Danger .................................................................................................................................................30
Disposal................................................................................................................................................30
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