2 BW 70 en
15
Fig. 23
Remove the sealing ring (304)
12. Now you can remove the metallic seat ring (321) (see
Figure 24).
Fig. 24
Replace the metallic seat ring (321)
13. Before replacing the metallic seat ring and the sealing
the parts shall be cleaned thoroughly.
14. Before reassembly check all parts for traces of wear. Use
Molykote BR2 for the hexagon-head screws on the top
and on the thread of the screws.(see Figure 25 - 26)
Fig. 25
Lubricate the screws with Molykote
Fig. 26
Lubricate the screws with Molykote
15. Check the high performance disc valve for its tightness
before reinstallation. Instruction can be in Section 3.3
"Installation".
10.6
Replacing worn parts
In order to replace worn parts, proceed as follows:
See Figures 27-33, the corresponding part numbers being
within brackets.
1.
Remove the actuator and the adapter (501) by loosen-
ing the hexagon-head screws (502, 503).
2.
Demount the metallic seat ring (321) as shown in Sec-
tion 12.5.
3.
Swivel the disc 180° to have free access to the clamping
discs (444) and the retaining plates (447).
4.
Demount the cover (430) on the backside of the valve.
Now you can remove the sealing (470) and the shaft
(402).
5.
On the front side (actuator side), remove the gland
(491) and the packing rings (451).
6.
Demount the shaft extension (102).
7.
Remove the sealing (107) and the actuator shaft. (401).
Fig. 27
Remove the actuator
Actuator
Screws
Adapter
