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.
5.3 Plug seal replacement
1. Remove the old seal
ring using a knife, screwdriver or similar.
Be careful not to d
amage metal parts.
2. Pre-mount plug se
al without pressing it into the groove.
3. Squeeze plug sea
l into the groove using opposite pressure points.
4. Release compres
sed air behind plug seal.
Note! For plug seal replacement, please read the instructions in the service kit.
5.4 Valve assembly
Reverse the or
der of section 5.2 Dismantling the valve.
Lubricate O-ring (21) and lip seal (25) with Klüber Paraliq GTE 703.
Remember to tighten spindle and plug to a torque of 30 Nm (using two 17 mm spanners).
If there are v
ibrations in the pipeline, Alfa Laval recommends the use of Loctite no. 243.
22
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