Alfa Laval Unique Mixproof LP, Инструкция по эксплуатации

Страница: 38 / 64

5 Maintenance
Study the instructions carefully.
The items refer to the parts list and service kits section.
Handle scrap correctly.
Replace seals if necessary.
Step 1
1. Dismantle the valve in accordance with instructions in section 5.2 Dismantling of valve
Pay special attention to the warnings!
2. The actuator is now ready for service. Please see drawing when dismantling according to steps 2 to 6 on this page.
Note! The actuator is maintenance-free but repairable.
Step 2
1. Place the actuator with intermediate piece in a vice.
2. Remove booster cylinder (126) by turning the cylinder.
Turn the cylinder until the lock ring (120) is fully removed though the groove in the cylinder and remove the cylinder.
3. Remove the bushing (128) with O-rings (129 & 130).
4. Remove the pistons (124 & 132).
5. Remove the lock ring (136) and separate the two pistons.
Remove all O-rings and bearings (122, 123, 125, 134, 131 &133)
6. Activate main stroke (Air fitting Position 3).
7. Remove screw (135) and pull out booster spindle (127).
8. Deactivate main stroke and remove actuator from vice.
Step 3
1. Remove nuts (36) and washers (35).
2. Pull out intermediate piece (37) from the actuator.
3. Remove cover disk (25).
4. Remove retaining ring (24).
Step 4
1. Remove piston rod (29), bottom (21) and lower piston (30).
2. Separate the three parts.
3. Remove O-rings (20, 22 and 23) from bottom, O-rings (33 and 31) and guide ring (32) from lower piston as well as O-ring
(28) from piston rod.
4. Remove spring assembly (14).
Step 5
1. Remove inner stem (27), main piston (17) and distance spacer (11). Remove guide ring (18) and O-ring (19)
2. Remove spring assembly (10).
Step 6
1. Unscrew screws (2) (glued!).
2. Remove stop (4).
3. Remove upper piston (8). Remove O-rings (7 and 9).
Step 7
1. Remove O-ring (5) and guide ring (6).
38