Fisher Manuals & Guides: Design E, EH, HP, YD and YS HIGH-SEAL ULF Packing | Fisher Manuals & Guides

Installation Instructions

February 2007

Design E, EH, HP, YD and YS

HIGH-SEAL ULF Packing

Use these instructions to install HIGH-SEAL ULF
packing in valves that have standard packing or
when inspecting or replacing HIGH-SEAL ULF
packing. Also refer to the HIGH-SEAL ULF
Live-Loaded Packing System instruction manual,
Form 5263 for additional information.

WARNING

Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
operations:

D Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.

D Disconnect any operating lines
providing air pressure, electric power,
or a control signal to the actuator. Be
sure the actuator cannot suddenly open
or close the valve.

D Use bypass valves or completely
shut off the process to isolate the
valve from process pressure. Relieve
process pressure from both sides of
the valve. Drain the process media
from both sides of the valve.

D Vent the pneumatic actuator
loading pressure and relieve any
actuator spring precompression.

D Use lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.

D The valve packing box may
contain process fluids that are
pressurized, even when the valve has

been removed from the pipeline.

Process fluids may spray out under
pressure when removing the packing
hardware or packing rings, or when
loosening the packing box pipe plug.

D Check with your process or safety
engineer for any additional measures

that must be taken to protect against
process media.

If you are installing the system in a valve that is still
connected to an actuator, remove the actuator from
the valve to provide sufficient space to install the
packing assembly.

WARNING

If a spring-return actuator is used, it is
possible that disconnecting the stem
connector will allow the spring to force
the actuator to the end of its travel,
which could result in personal injury.
Be sure the actuator spring is resting
on its travel stop. Refer to the
appropriate valve and actuator
instruction manuals to remove the
actuator.

1. Carefully remove the old packing parts from the
packing box. The surface condition of the valve stem
and the packing box wall is critical in obtaining a
good seal. If the valve stem needs to be replaced, or
any other valve part, refer to the appropriate valve
instruction manual for replacement procedures.
Complete all valve maintenance before installing the
HIGH-SEAL ULF packing system into the bonnet.

2. If a retrofit kit is being installed in place of the
original packing, remove the existing packing studs
from the valve and replace them with the longer
studs (key 200).

Note

Ensure that the packing box parts are
assembled in the correct order.
Packing parts can not function
properly if the Belleville springs or
other packing parts are not stacked
correctly.

3. Refer to figure 1 to ensure that the packing parts
are assembled in the correct order. Install the
HIGH-SEAL ULF packing parts into the packing box.

D For valves with 9.5 mm (3/8 inch) valve

stems, do not install the packing follower (key 203)

at this time. (Note: the yoke boss will not slide over
the packing follower. The packing follower must be

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D103275X012

Design E, EH, HP, YD and YS
HIGH-SEAL ULF Packing

Installation Instructions

February 2007

installed while lowering the actuator yoke onto the
valve.)

Note

Lubrication is required for the packing
studs and nuts.

Although it is important to properly
lubricate the stud threads and internal
nut threads, it is also important to
properly lubricate the contacting face
of the nut.

D For valves with 12.7 mm (1/2 inch) or larger

stem diameters, install the packing follower (key

203).

4. Refer to the appropriate valve and actuator
instruction manuals when connecting the valve to
the actuator. While lowering the actuator yoke onto
the valve, install the packing follower [for a 9.5 mm
(3/8 inch) valve stem size], indicator disk, springs,
and flange (keys 203, 206, 202, and 201).

5. Place the packing follower against the packing as
shown in figure 1.

6. Place the indicator disk (key 206) and the first
Belleville spring (key 202) while guiding them onto
the packing follower (key 203). Make certain the
cone-shaped side of the Belleville spring is towards
the indicator disk as shown in figure 1.

7. Place the second Belleville spring (key 202) with
the coned-shaped side toward the flange (key 201);
see figure 1. Position the flange on top of the spring,
making sure the second spring fits into its guide in
the flange.

CAUTION

Keep the packing follower and flange
centered on the valve stem. If any
metal part makes contact with the
stem, it can cause damage to the stem
surface. Vertical scratches or nicks on
the stem surface can cause excessive
leakage from the packing.

8. Install the washers (key 219, not required for 9.5
mm [3/8 inch] stem). Lubricate the packing nuts with
anti-seize lubricant and tighten them hand-tight.

9. The load scale is used to indicate compression
on the Belleville springs. Position the load scale
(key 205) by slightly loosening the mounting screws
(key 204). Align the bottom edge of the load scale
with the indicator disk and retighten the screws.

Figure 2 illustrates the load scale properly adjusted
before the nuts have been tightened and with the
Belleville springs not compressed.

Note

Failure to properly adjust the load
scale will invalidate the Belleville
spring compression indication.

10. Tighten the packing nuts while observing the
two load scales (key 205) to make sure the flange
(key 201) is tightened evenly. See figure 2 for the
minimum spring compression line on the load scale.
Be sure to keep the follower centered on the stem
while tightening the nuts. Tighten the nuts alternately
and evenly, keeping the flange parallel with the valve
(see figures 1 and 2), until the indicator disk aligns
with the maximum compression line on the load
scales, as shown in figure 2.

11. Under normal conditions, the packing nuts
should not require re-tightening for the life of the
packing.

For additional information concerning the installation
of this packing kit, consult the appropriate valve and
packing instruction manuals.

12. Install the actuator, following instructions in the
appropriate instruction manual.

WARNING

Stems and packing box constructions
that do not meet Emerson Process
Management stem finish
specifications, dimensional tolerances,
and design specifications may
adversely alter the performance of this
packing retrofit, resulting in personal
injury or property damage.

WARNING

Use only genuine Fisherr replacement
parts. Components that are not
supplied by Emerson Process
Management should not, under any
circumstances, be used in any Fisher
valve, because they will void your
warranty, might adversely affect the
performance of the valve, and could
give rise to personal injury and
property damage.

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