OpDx Butterfly Control Valve
6
6. Insert new taper pins and drive them firmly
into place in the side opposite the stop.
7. Slide the packing retainer, lower packing,
packing spacer, upper packing, and
packing follower over splined end of the
shaft and into the body. Typical packing
configurations are shown in Figure 3.
Note:
Always use new packing whenever
rebuilding the packing box.
CAUTION:
Since the sealing on
V-ring packing takes place at
the feather edge, it is important
to avoid damage to that edge.
8. Reinstall the end plug (or replace the end
seal and reinstall the bolted flange).
9. Reinstall the gland flange and packing nuts.
Tighten packing evenly to slightly over
finger-tight.
CAUTION:
Do not over-tighten
packing. This can cause
excessive packing wear and
high shaft friction, which may
impede shaft rotation.
10. All seat configurations with screw/clip
retainers require a gasket (item No. 55)
installed in the appropriate groove. This is
accomplished by pressing the gasket into
the appropriate groove.
11. If the seat retainer is the screw/clip type
and has a soft or dual seat, press the soft
seat into the soft seat retainer or metal
seat. (There should be an interference
between the soft seat and the retainer.)
With the valve in the closed position,
secure the retainer or metal seat in place
by tightening the retainer clips and screws.
This allows the seat to align with the disc,
permitting tight shutoff.
12. If the seat retainer is the screw/clip type
with a metal seat design, a gasket will need
to be installed in the metal seat prior to
clipping the seat in place with the seat clips
and screws.
Note:
Optimux valves of earlier design may
require that the disc be open while installing
the soft seat into the body. (Refer to Figure
1D.)
13. If an early design Optimux seat retainer
has an indexing groove to accept a soft
seat, press the corresponding seat into the
retainer groove. Install the seat retainer
subassembly into the body.
14. On valves supplied with the retainer snap-
ring configuration, install the snap-ring into
the groove around the retainer (or metal
seat). Start the retainer into the body with
the open ends of the snap-ring in the body
groove. Gently press the snap-ring into the
retainer until both the retainer and snap-
ring slip into the body. (Refer to
Figure 1D.)
15. On early design Optimux valves supplied
with seat retainer screws, install the insert
and retainer into the body with the disc
open. Loosely install the retainer screws,
then close the disc. Tighten the screws
after the closed disc has centered the seat.
This allows the seat to align with the disc,
permitting tight shutoff.
REMOUNTING ACTUATOR
Before mounting an Optimux actuator on the
valve body, verify that the disc rotation
matches the actuator rotation and complies
with the air failure requirements. Procedure for
mounting the actuator is as follows:
