31
18. Setting the mechanical position indicator (option)
.
Place indicator disc on shaft.
.
Move valve to end position CLOSED.
.
Turn lower indicator disc (figure 41) until symbol CLOSED is in alignment
with the mark on the cover (figure 42).
.
Move actuator to end position OPEN.
.
Hold lower indicator disc CLOSED in position and turn upper disc with
symbol OPEN until it is in alignment with the mark on the cover.
Indicator disc rotates approximately 180° to 230° at full travel from OPEN to
CLOSED or vice v
ersa. For this purpose, a suitable reduction gearing was
installed in our works.
If the turns per stroke of the actuator are changed at a later date, the reduc-
tion gearing may have to be exchanged.
19. Closing the switch compartment
.
Clean sealing faces of housing and cover
.
Check whether O-ring is in good condition.
.
Apply a thin film of non-acidic grease to the sealing faces.
.
Replace cover on switch compartment and fasten bolts evenly crosswise.
Check the multi-turn actuator for damage to paint finish. If
dama
ge to paint-finish has occurred after mounting, it has to
be touched up to avoid corrosion.
Figure 41
Indicator disc
Figure 42
Mark
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