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.
5.4
Assembly of valve
Reverse order of 5.2 Dismantling of valve.
Lubricate O-ring (21) and lip seal (25) with Klüber Paraliq GTE 703.
Remember to tighten spindle and plug with a torque M = 30Nm (use two 17mm spanners).
If there are vibrations in the pipeline Alfa Laval recommend to use Loctite no. 243.
5.5
Assembly instruction for positioner
1. Mount the indication spindle (79) in top of actuator spindle (5).
2. Mount adapter (82) on top of actuator.
3. Fasten adapter by cross tighten the screws (81).
4. Mount the sensor pad (85) on the top of the indication spindle (79).
5. Remove top lid (a) and the cover (b) from positioner (77.1/77.2).
6. Grease seals lightly before assembly of the other parts with
KlüberParaliq GTE 703.
7. Centring the sensor pad (85) in the guide rail inside the positioner when
mounting the positioner unit (77.1/77.2) down over the adapter.
8. Fasten positioner (77.1/77.2) by cross tighten the screws.
9. Bring the actuator in top position (by using air if necessary).
10. Wire the electric connections according to “Quick start guide”.
11. Assemble the cover (c) and the top lid (a) again.
12. Mount the actuator on the valve and make the settings according to
“Quick start guide”.
b
79
82
81
85
c
77.1 / 77.2
a
2404-0019
5
10
5.6
Actuator bushing replacement
1. Unscrew and remove O-rings.
2. Lubricate O-rings with Molykote Longterm 2 plus before fitting.
3. Fit bushings and O-rings. Tighten bushing with a torque = 10Nm.
Be careful not to overtighten.
8
6
7
21
Summary of Contents for Unique RV-ST
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