MAINTENANCE
Series 150
18/27
Edition 2014-11-03
773485EA
6.4
Replacement of gate and bonnet seal
WARNING
Loaded spring steel sheet
Human body parts may get jammed and severely injured.
Do not put human body parts between valve gate and spring steel sheet.
NOTICE
Contamination
Product may get contaminated.
Always wear cleanroom gloves when handling the product.
NOTICE
Inappropriate tools
Sealing surfaces may get damaged.
Do not use sharp-edged tools.
The numbers in brackets ( ) refer to «Figure 6-3» on page 20.
1. Vent chambers on either side to atmospheric pressure.
2. Open valve.
3. Disconnect compressed air supply.
4. Disconnect electrical power supply.
5. Remove all screws (2).
6. Lift upper valve body (5) carefully from lower part of body (1) without touching the body
wall and put it on a clean place.
7. Apply compressed air (air pressure approx. 1 bar) and move the gate slowly out of
upper part of body (5).
Provide sufficient free space in order to prevent the gate from touching any
objects.
8. Disconnect compressed air.
9. Hold the gate fixation screw (6) with an open-end wrench during disassembly of the
gate.
10. Rotate gate (4) until gate is removable.
