Emerson Fisher EU - Packing Lubrication; Packing Maintenance

Instruction Manual
D102010X012
EU and EW Series Valves
July 2017
8
Figure 3. Typical Packing (Continued)
A6060
PACKING BOX
RING (KEY 11)
DOUBLE ARRANGEMENT
31.8 mm
(1-1/4 INCH) STEM
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS:
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING
SINGLE ARRANGEMENT
GRAPHITE RIBBON/FILAMENT PACKING
31.8 mm
(1-1/4 INCH) STEM
PACKING BOX
RING (KEY 11)
LANTERN
RING (KEY 8)
LANTERN
RING (KEY 8)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
GRAPHITE RIBBON
PACKING RING (KEY 7)
GRAPHITE RIBBON
PACKING RING (KEY 7)
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
Packing Lubrication
CAUTION
Do not lubricate graphite packing. Graphite packing is self-lubricated. Additional lubrication may result in slip-stick
movement of the valve.
If a lubricator or lubricator/isolating valve (figure 2) is provided for PTFE/composition or other packings that require
lubrication, it will be installed in place of the 1/4 NPT pipe plug (key 14, figure 4). Use a silicon‐base lubricant. To
operate the lubricator, turn the cap screw clockwise to force the lubricant into the packing box. The
lubricator/isolating valve operates the same way except the isolating valve must first be opened and then closed after
lubrication is completed.
Packing Maintenance
This procedure does not cover ENVIRO‐SEAL or HIGH‐SEAL packing; refer to separate manuals for instructions on those
packing types.
Key numbers are shown in figure 3 unless otherwise indicated.
For spring‐loaded single PTFE V‐ring packing, the spring (key 8) maintains a sealing force on the packing. If leakage is
noted around the packing follower (key 13), check to be sure the shoulder on the packing follower is touching the
bonnet. If the shoulder is not touching the bonnet, tighten the packing flange nuts (key 5, figure 4) until the shoulder
is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing Packing section.
If there is undesirable packing leakage with other than spring‐loaded packing, first try to limit the leakage and
establish a stem seal by tightening the packing flange nuts.
If the packing is relatively new and tight on the stem and if tightening the packing flange nuts does not stop the
leakage, it is possible that the valve stem is worn or nicked so that a seal cannot be made. The surface finish of a new