9 Maintenance
This chapter
contains information about valve maintenance, inspection and repairs. It
also describes the personnel qualications required for the individual actions.
It is addressed to all persons who carry out actions related to the valve.
INFO During all repair work, observe the chapter
2 Safety
of this Operating In-
structions.
9.1 Carrying out inspections
Between the maintenance periods, the valves must be checked for leakage and proper
function.
9.1.1 Checking seals that come into contact with the product
Prerequisites
●
Access to seals that come into contact with the product
1. Regularly
check seals that come into
contact with the product:
1.1 Check the seal ring between
upper housing and lantern.
1.2 Check the V-ring in the valve
disks.
1.3 Check the O-rings between the
valve housings.
Þ
Seals that come into contact with the product have been tested.
9.1.2 Checking the pneumatic connection
Prerequisites
●
Access to the pneumatic connection
1. Check the operating pressur
e at the pressure reducing and lter station.
2. Regularly clean the air lter in the lter station.
3. Check that the air connections are tight.
4. Check the lines for kinks and leaks.
5. Check the solenoid valves for proper function.
Þ
The pneumatic connection has been checked.
9.1 Carrying out inspections - 47 / 104
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