5 Maintenance
Study the instructions carefully. The items refer to the parts list and service kits section. Handle scrap correctly.
NC = Normally closed.
NO = Normally open.
A/A = Air/air activated.
5.2
Dismantling the valve
If the actuator is marked with a danger warning, do NOT attempt to cut the actuator open.
DO NOT DISASSEMBLE
kg
!
SPRING UNDER LOAD
Do not attempt to cut open
kg
!
WARNING
SPRING UNDER LOAD
DO NOT ATTEMPT TO CUT ACTUATOR OPEN
REFER TO SERVICE BULLETIN
!
Do NOT attempt to disassemble the
actuator due to spring under load danger.
Do NOT attempt to cut the actuator
open due to spring under load danger.
Do NOT attempt to cut the actuator
open due to spring under load
danger.
Step 1
1a
Shut-off valve:
1. Supply compressed air to the actuator (only NC).
2. Loosen and remove clamp.
3. Release compressed air (only NC).
4. Lift away the actuator.
5. Unscrew and remove valve plug.
6. Remove O-ring, lip seal and bushing in bonnet.
(Use bushing tool and rubber mallet.)
Note! Be careful not to damage the bushing.
Pay special attention to the warnings!
TD 461-959
Note!
Be careful not to damage the
bushing.
Note! For plug seal replacement please please see section
5.3 Elastomer and TR2 seal ring replacement.
1b
Change-over valve:
1. Supply compressed air to the actuator (only NC).
2. Loosen and remove lower clamp.
3. Release compressed air (only NC).
4. Lift away the actuator and upper valve body.
5. Supply compressed air to the actuator (only NO).
6. Unscrew and remove valve plug.
7. Release compressed air (only NO).
8. Remove seat and O-rings.
9. Loosen and remove upper clamp.
10. Remove upper valve body.
11. Remove O-ring, lip seal and bushing in bonnet.
(Use bushing tool and rubber mallet.
See drawing, step 1a.)
Note! Be careful not to damage the bushing.
Pay special attention to the warnings!
Note! For plug seal replacement please see section 5.3
Elastomer and TR2 seal ring replacement.
UP
TD 461-331_1
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