15
Figure 7. Disc Rotation Indication
INDICATES
APPROXIMATE
DISC
POSITION
CAUTION: DO
NOT ROTATE
DISC INTO
THIS SECTOR
ROTATE DISC
IN DIRECTION
SHOWN ONLY
ROTATE DISC IN
EITHER DIRECTION
ROTATE DISC IN
DIRECTION
SHOWN ONLY
A2879-2
DISC ROTATION INDICATION FOR NPS 2
DISC ROTATION INDICATION FOR NPS 2 THROUGH 12
A6358
2
2
2
Note:
SET ACTUATOR TRAVEL STOPS TO OBTAIN AN
EQUAL DISTANCE T DISC SURFACE AS SHOWN.
LOCATION OF C MARKINGS FOR NPS 2 ONLY.
DISC IN THE
CLOSED POSITION
DISC IN THE
OPEN POSITION
TO OPEN
DISC STOP
INDICATES
APPROXIMATE
DISC POSITION
ACTUATOR END
OF SHAFT
RETAINER RING
(KEY 2)
Figure 8. Removing the Retainer Ring
A6359
KNOCK-OUT FLAT
FLAT END
PUNCH
CAUTION
During any of the following steps, do not rotate the disc past 90 degrees in the open direction. Rotating the disc past 90
degrees can damage the seal ring.
Disassembly
Refer to removing the actuator steps in the Packing Maintenance section. Most maintenance procedures will require
the actuator to be removed.