5 Maintenance
Study the instructions carefully.
The items refer to the parts list and service kits section.
Handle scrap correctly. NO = Normally open. NC = Normally closed. A/A = Air/air activated.
Service tool: See Spare Parts.
5.4
Dismantling of actuator
Step 1
1. Rotate cylinder (3)
2. Remove lock wire (4)
Rotate with the
service tool!
TD425-173_1
Step 2
1. Remove cylinder (3)
2. Remove O-rings (2, 7) from bonnet (8) and cylinder (3)
(For sizes DN125-150 also remove O-ring (24) and guide rings
(21, 25))
TD425-174_1
Step 3
1. Remove piston (6) and spring assembly (10)
2. Remove O-ring (5) from the piston. (For sizes DN125-150 also
remove guide ring (22) and top pin (23))
NOTE!
The A/A actuator has no spring assembly.
TD425-175_1
24
