Burkert Type 2000 - Manual (Page 17)

17
Repairs
11.1.2. Replacing valve set
Pendulum disc
Seal holder
Seat seal
Centering
Graphite seal
Spindle
Wrench flat
Fig. 7: Valve set
WARNING!
Risk of injury from damaged devices!
If the wrong tools are used for assembly work, the device may be
damaged.
• To remove the actuator from the valve housing, use an open-end
wrench, never a pipe wrench.
If the tightening torque is too great, the spindle thread may be
damaged.
• Observe tightening torque (40 ± 3 Nm)
Procedure:
→
Counter spindle on the wrench flat using open-end wrench
(WAF 7).
→
Carefully loosen centering using a suitable open-end wrench
(WAF 5.5) to prevent damaging the spindle thread.
→
Unscrew centering.
→
Remove seal holder together with seat seal.
→
Attach new seal holder and new seat seal to the spindle.
→
Apply adhesive (Loctite 640) to spindle thread.
→
Screw on centering and tighten using a suitable open-end
wrench (WAF 5.5).
Observe tightening torque (40 ± 3 Nm)!
english
Type 2000 INOX