DeZURIK
2---16" PTW & PFW Tapered Plug Valves
April 2015
Page 7
D10188
Packing Replacement
(Continued)
When a tapered plug valve is mounted in a vertical pipeline—or mounted in a horizontal
pipeline with the plug stem horizontal—gravity can cause the plug to swing to a lower
position in the valve body when the actuator is removed. Place the plug in the lowest
position before removing the actuator.
4. Remove the actuator from the valve. See Actuator Instructions.
5. Remove the actuator adaptor (when used) from the valve.
6. Remove the packing gland nuts, then slide the packing gland off the valve shaft.
7. Pull the packing out of the bonnet.
8. Lubricate the new packing, then install it one ring at a time in the sequence shown in Figure 1.
Packing Replacement
(Continued)
Figure 1—Correct Packing Installation Sequence
9. Slide the packing gland down the valve shaft and over the studs.
10. Turn the packing gland nuts onto the studs until they touch the packing gland, then one more
turn.
Note:
This is a preliminary adjustment, it will be necessary to adjust the packing gland nuts after the
valve is pressurized.
11. Fasten the adaptor (when used) to the valve, lining up the scribe marks made during
disassembly.
12. Install the actuator as described in the Actuator Instructions.
13. If the actuator is a powered actuator, reconnect power to the actuator.