Instruction Manual

Instruction Manual
D103298X012
Control-Disk Valve
May 2011
15
WARNING
Once the shafts have been removed in the following step, the disk may fall from the valve body. To avoid personal injury
and disk damage, support the disk to prevent it from falling as the shafts are being removed.
6. Pull the follower shaft (key 11) out through the outboard end of the valve body. If the follower shaft cannot be
pulled free, the end of the follower shaft is internally threaded (see table 6) for screwing in a bolt or stud to aid in
pulling the follower shaft.
7. Pull the drive shaft (key 10) out through the actuator end of the valve body and remove the anti‐blowout ring (key
40) from the drive shaft..
8. Remove the disk (key 3) from the valve body.
9. Remove the packing (key 24, figure 5) and the packing box ring (key 23, figure 5).
10. If either of the bearings (key 6) require replacement, remove them.
11. Clean the packing box and [metal packing box parts].
Assembly
WARNING
Do not lubricate bearings that will be used for oxygen service, or where the lubrication is incompatible with the process
media. Any
use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing personal
injury or property damage.
CAUTION
To avoid possible product damage, ensure the bearing tabs are oriented correctly when installing in the following
procedure. See figure 6 for proper orientation of the bearings.
1. If new bearings (key 6) are required, install and orient them in the valve body, as shown in figure 6. Ensure the
bearings are fully seated, contacting the inside diameter of the valve body.
2. Insert the disk into the valve body as shown in figure 7, ensuring the “T” stamped on the disk hub is oriented toward
the actuator end of the valve body.
3. Install the drive shaft (key 10) through the valve body into the disk. The disk/shaft connection utilizes taper and
expansion pins. The hole for the drive shaft connection is slightly off‐center to prevent the drive shaft from being
installed in the wrong orientation. Orient the position indication mark on the end of the shaft with the face of the
disk as shown in figure 8. The hole for the follower shaft connection is on‐center. Insert the expansion pins into the
disk until they are seated, as shown in figure 7. Once in place, insert the taper pins. The taper pins must be driven
into the disk/shaft/expansion pin assemblies until “solid contact” is felt. “Solid contact” can be identified by the
sound of the hammer blow and the bounce felt in the hammer.
4. Reinstall the follower spring/spring seat assembly (keys 9, 12, and 9, figure 9) inside the follower shaft.
5. Install the spacer (key 15) if used, and the gasket, blind flange, and hex nuts (keys 16, 17, and 19). Ensure the blind
flange is oriented so the serrations face the gasket and valve body. Tighten the hex nuts (key 19) per table 7.
6. The valve must be closed during seal ring installation to permit accurate centering of the seal. To install the new
seal ring assembly or flow ring: