Packing Lubrication; Packing Maintenance - Fisher EZ easy-e Instruction Manual

EZ Valve
November 2017

Packing Lubrication

Note
ENVIRO‐SEAL or HIGH‐SEAL packing does not require lubrication.
If an optional lubricator or lubricator/isolating valve (figure 2) is provided for PTFE/composition or other packings that
require lubrication, it will be installed in an optional tapped hole in the bonnet. Use a good quality silicon‐base
lubricant. Packing used in oxygen service or in processes with temperatures over 260_C (500_F) should not be
lubricated. To operate the lubricator, simply turn the cap screw clockwise to force the lubricant into the packing box.
The lubricator/isolating valve must first be opened and then closed after lubrication is completed.
Figure 4. PTFE/Composition Packing Arrangements for Plain and Extension Bonnets
12A8188-A
9.5 mm (3/8 INCH) STEM
B0968‐1*

Packing Maintenance

This section covers PTFE V‐ring, PTFE/composition, and graphite/ribbon packing as used in plain and extension
bonnets. Unless otherwise indicated, key numbers refer to figure 3 for PTFE V‐ring packing, figure 4 for
PTFE/composition packing, and figure 5 for graphite ribbon/filament packing.
For spring‐loaded single PTFE V‐ring packing, the spring (key 8, figure 3) maintains a sealing force on the packing. If
leakage is noted around the packing follower (key 13, figure 3), 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 11),
until the shoulder is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing
Packing procedure.
If there is unacceptable 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.
6
12A7815-A
12.7 mm (1/2 INCH) STEM
PTFE/COMPOSITION PACKING
Instruction Manual
UPPER WIPER
(KEY 12)
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
12A8173-A
19.1 mm (3/4 INCH) STEM
D100401X012