DeZURIK
2---16" PTW & PFW Tapered Plug Valves
April 2015
Page 9
D10188
Disassembly
(Continued)
11. Reaching through the packing chamber in the bonnet, drive the upper bearing out of the bonnet
using a hammer and pin punch.
12. Remove the lower bearing from the valve body.
Note:
The bearing can be chiseled out; or, it can be hydraulically forced out. See Figure 3.
To hydraulically force the bearing out:
1. Fill the interior diameter of the bearing with water.
2. Pound a shaft with the same outside diameter as the lower journal of the valve plug into the
bearing
Figure 3—Hydraulically Removing the Lower Bearing
Reassembly
1. Push a new lower bearing into the valve body, then lubricate the bearing as described in the
L
UBRICATION
section of these instructions.
2. Place the plug into the valve body so the lower journal slides into the bearing. Turn the plug so it
is in position noted during disassembly.
3. Set a new gasket in the body.
4. Push a new bearing into the bonnet, then lubricate the bearing. See L
UBRICATION
section of
these instructions
5. Place bonnet on valve, align scribe marks, then fasten bonnet in place.
6. Lubricate the new packing, then install it one ring at a time. See Figure 1.
7. Slide the packing gland down the valve shaft and over the studs.
8. Turn the packing gland nuts onto the studs until they contact the packing gland, then one
additional turn.
Note:
This is a preliminary adjustment, it will be necessary to adjust the packing gland nuts after the
valve is pressurized. See P
ACKING
A
DJUSTMENTS
in these instructions.
9. Install the actuator—see Actuator Instructions.