29
Maintenance, cleaning
Procedure:
→
Replace the valve seat as described below when the actuator
is removed.
Replacing valve seat
→
Use the assembly tool (with suitable tool attachment) and a
wrench to unscrew the old valve seat.
→
Clean the body thread and seal surface with compressed air.
→
Attach a new valve seat to the assembly tool.
Assembly tool
Tool insert
valve seat
Image24: Replacingthevalveseat
WARNING!
Danger due to incorrect lubricants.
Unsuitable lubricant may contaminate the medium. There is a
risk of explosion in oxygen applications.
▶
For specific applications, e.g. oxygen or analysis applications,
use approved lubricants only.
→
Grease the valve seat thread using a lubricant (e.g. Klüber
-
paste UH1 96-402 from Klüber).
→
Manually screw attached valve seat into the body thread.
→
Tighten valve seat using torque wrench. Observe tightening
torque (see „Tab. 10“).
Valve seat size
Tightening torque [Nm]
Coated valve seat
15
20 ± 3
20
28 ± 3
25
40 ± 5
32
65 ± 5
40
85 ± 8
50
120 ± 8
65
150 + 10
80
180 + 10
100
220 + 10
Tab.10: Tighteningtorquesvalveseatassembly
Type 2101
English