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ISO 9001
EN 29001
Installation, Operating, and Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
278737EB
2003-04-14
9/14
Preventive maintenance
Under clean operating conditions, the valve does not require any maintenance during the specified cycle life.
Maintenance
Replacement of actuator/mechanism assembly
The figures in brackets refer to the drawing on page 11
- Vent chambers and open valve
- Disconnect compressed air and electrical power from valve
- Remove bonnet screws (61) in crosswise order
- Withdraw actuator/mechanism assembly carefully from body
- Check and clean sealing surfaces of bonnet and valve seat
- Put new bonnet seal (60) on body or bonnet (depending on mounting position). If the actuator is directed downwards,
proceed according to the following drawing:
- Reassemble in reverse direction
Note! Tighten screws in crosswise order!
Torque: DN 63 - 160 20 Nm / 15 lbf . ft
DN 200
40 Nm / 30 lbf . ft
Body
Adhesive tape
Bonnet seal
Bonnet