Fisher EHD User manual

www.Fisher.com
FisherrEHD and EHT NPS 8 through 14
Sliding-Stem Control Valves
Contents
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1. . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 4. . . . . . . . . . . . . . . . . . . . . . .
Maintenance 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Packing Lubrication 5. . . . . . . . . . . . . . . . . . . . . . .
Packing Maintenance 6. . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 6. . . . . . . . . . . . . . . . . . . . . . .
Trim Removal 10. . . . . . . . . . . . . . . . . . . . . . . . . . .
EHD, EHT Valve Plug Maintenance 10. . . . . . . .
Lapping Seats 11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Trim Replacement 11. . . . . . . . . . . . . . . . . . . . . . .
Retrofit: Installing Bore Seal Trim 13. . . . . . . . . . .
Replacement of Installed Bore Seal Trim 15. . . .
Trim Removal (Bore Seal Constructions) 15. . .
Lapping Metal Seats
(Bore Seal Constructions) 16. . . . . . . . . . . . .
Remachining Metal Seats
(Bore Seal Constructions) 16. . . . . . . . . . . . .
Trim Replacement
(Bore Seal Constructions) 17. . . . . . . . . . . . .
Actuator Mounting 18. . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bonnet Assembly 21. . . . . . . . . . . . . . . . . . . . . . . .
Valve Assembly 23. . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
Scope of Manual
This instruction manual includes installation,
maintenance, and parts ordering information for
NPS 8 through 14 FisherrEHD and EHT
sliding-stem globe-style control valves. Refer to
separate manuals for instructions covering the
actuator, positioner, and accessories.
Figure 1. FisherrEH Series Control Valve
with 667 Actuator
W2992-1/IL
Do not install, operate, or maintain an EH valve
without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and
maintenance. To avoid personal injury or property
damage, it is important to carefully read, understand,
and follow all the contents of this manual, including
all safety cautions and warnings. If you have any
questions about these instructions, contact your
Emerson Process Management sales office before
proceeding.
Instruction Manual
D100392X012
April 2009 EH Valves (NPS 8 through 14)

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
2
Table 1. Specifications
End Connection Styles(1)
Buttwelding: All available ASME B16.25
schedules that are compatible with ASME B16.34
pressure/temperature ratings
Flanged Ends: CL1500 or 2500 Jraised-face
(RF) or Jring-type joint (RTJ) flanges per ASME
B16.5
Shutoff Classifications
See table 2
Bore seal trim: High-temperature, Class V.
See table 3
Flow Characteristic
Standard Cages: JLinear, Jequal percentage,
or Jmodified equal percentage(2)
Whisper TrimrIII Cages: JLinear or
Jmodified characteristics available upon request
Flow Direction
Normally flow down (in through the cage windows
and out through the seat ring) for all cage styles
except for applications using either a Whisper
Trim III cage or a diverter cone plug, both of which
are flow up only
Additional Specifications
For specifications such as materials, valve plug
travels, and port, yoke boss, and stem diameters,
see the Parts List section
Approximate Weights
See table 4
1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.
2. Valves using an equal percentage cage may be travelled an additional 13 mm (0.5 inch) if desired to obtain additional capacity; flow characteristic becomes modified equal percentage.
Table 2. Shutoff Classifications(1)
VALVE
DESIGN
ANSI/FCI
LEAKAGE
CLASS
EHD III—Standard
IV—Optional
EHT IV—Standard
V—Optional
EHT w/ PEEK(2)
Anti-Extrusion Rings V to 316_C (600_F)
1. Per ANSI/FCI 70-2 and IEC 60534-4
2. Poly Ether Ether Ketone
Description
The EHD and EHT valves, shown in figure 1, are
large, sliding-stem, high-pressure, globe-style
valves. These valves have metal seats, cage
guiding, and push-down-to-close valve plug action.
The EHD and EHT valves feature balanced valve
plugs. To provide a seal between the valve plug and
cage, the EHD valve plug has piston rings; the EHT
valve plug has a pressure-assisted seal ring.
Bore seal trim is available for EHD valves, CL1500,
NPS 8 and 10 and CL2500, NPS 8, 10, 12, and 14.
With Bore seal trim, a balanced valve can achieve
high-temperature, Class V shutoff. Because the Bore
seal plug seal is formed from metal (N07718 nickel
alloy) rather than an elastomer, a valve equipped
with the Bore seal trim can be applied in processes
with a fluid temperature of up to 593_C (1100_F),
provided other material limits are not exceeded.
Specifications
Specifications for the EHD and EHT valves are
shown in table 1.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
3
Table 3. Additional Shutoff Classification
VALVE DESIGN
(PRESSURE RATING) VALVE SIZE, NPS PORT DIAMETER, INCHES CAGE STYLE ANSI/FCI LEAKAGE CLASS
EHD
(CL500)
8
10 7
Equal Percentage
Modified Equal Percentage
Linear (std. cage)
Linear (Whisper III, A1, B3, C3)
V with
optional Bore seal trim
EHD
(CL2500)
8
10 5.375
Equal Percentage, Modified Equal Percentage,
Linear (std. cage),
Linear (Whisper III, A1, B3, C3, D3)
V with
optional Bore seal trim)
12
14 7
Equal Percentage, Modified Equal Percentage,
Linear (std. cage),
Linear (Whisper III, A1, B3, C3, D3)
V with
optional Bore seal trim)
Table 4. Approximate Weights (Valve Body and Bonnet Assemblies)
VALVE
SIZE,
NPS
WEIGHTS
CL1500 CL2500
Buttwelding Ends Flanged Buttwelding Ends Flanged
Kilograms Pounds Kilograms Pounds Kilograms Pounds Kilograms Pounds
8 1400 3100 1700 3700 1900 4100 2200 4700
10 1500 3300 1900 4100 2000 4400 - - - - - -
12 3400 7300 3900 8600 3400 7600 - - - - - -
14 3400 7300 - - - - - - 3400 7600 - - - - - -
Installation
WARNING
Always wear protective gloves,
clothing, and eyewear when
performing any installation operations
to avoid personal injury.
To avoid personal injury or property
damage resulting from the sudden
release of pressure, do not install the
valve assembly where service
conditions could exceed the limits
given in this manual or on the
appropriate nameplates. Use
pressure-relieving devices as required
by government or accepted industry
codes and good engineering practices.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
If installing into an existing
application, also refer to the WARNING
at the beginning of the Maintenance
section in this instruction manual.
CAUTION
The valve configuration and
construction materials were selected
to meet particular pressure,
temperature, pressure drop, and
controlled fluid conditions. Because
some body/trim material combinations
are limited in their pressure drop and
temperature range capabilities, do not
apply any other conditions to the valve
without first contacting your Emerson
Process Management sales office.
If hoisting the valve, use a nylon sling
to protect the painted surfaces.
Carefully position the sling to prevent
damage to the actuator tubing or any
accessories. Also, take precautions to
prevent personnel from being injured
in case the hoist or rigging slips
unexpectedly. Refer to table 4 for valve
assembly weights and the appropriate
actuator instruction manual for
actuator assembly weights. Be sure to
use adequately sized hoists and
chains or slings to handle the valve
and actuator assembly.
1. Before installing the valve, inspect it to ensure
that the valve body cavity is free of foreign material.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
4
2. Clean out all pipelines to remove scale, welding
slag, and other foreign materials before installing the
valve.
Note
If installing a valve with small internal
flow passages, such as with Whisper
Trim III or CavitrolrIII cages, consider
installing an upstream strainer to
prevent the lodging of particles in
these passages. This is especially
important if the pipeline cannot be
thoroughly cleaned or if the flowing
medium is not clean.
3. Install the control valve with the valve body in a
horizontal pipeline and the actuator vertical above
the valve. Other orientations may result in shortened
trim life and difficulty with field maintenance. Flow
through the valve body must be in the direction
indicated by the flow arrow (key 15, figure 12 or 13)
on the valve body.
CAUTION
Depending on valve body materials
used, post-weld heat treating might be
needed. Post-weld heat treatment can
damage internal elastomeric, plastic,
and metal parts. Shrink-fit pieces and
threaded connections might also
loosen. In general, if post-weld heat
treating is needed, remove all trim
parts. Contact your Emerson Process
Management sales office for additional
information.
4. Use accepted piping and welding practices when
installing the valve in the line. For flanged valve
bodies, use suitable gaskets between the valve body
flanges and pipeline flanges.
5. Install a three-valve bypass around the control
valve if continuous operation is required during
maintenance.
6. If the actuator and valve are shipped separately,
see the Actuator Mounting procedure.
WARNING
Personal injury could result from
packing leakage. Valve packing was
tightened prior to shipment; however
some readjustment will be required to
meet specific service conditions.
7. If the valve was shipped without packing installed
in the packing box, install the packing prior to putting
the valve into service. Refer to instructions given in
the Packing Maintenance section of this manual.
Principle of Operation
Key numbers referenced in this section are shown in
figure 12 for the EHD valve and in figure 13 for the
EHT valve.
EHD and EHT valves are balanced designs. When
they are opening or closing, pressure registers on
top of the valve plug (key 3) through the registration
holes in the plug. The force of the pressure on top of
the plug balances the force of the pressure on the
bottom of the plug to reduce the actuator force
required.
Maintenance
Valve parts are subject to normal wear and must be
inspected and replaced as necessary. Inspection
and maintenance frequency depends on the severity
of service conditions. This section includes
instructions for packing lubrication and maintenance,
trim maintenance, and lapping of metal seats. All
maintenance operations can be performed with the
valve in the line.
WARNING
Avoid personal injury from sudden
release of process pressure. Before
performing any maintenance
operations:
DDo not remove the actuator from
the valve while the valve is still
pressurized.
DAlways wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.
DDisconnect 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.
DUse bypass valves or completely
shut off the process to isolate the
valve from process pressure. Relieve
process pressure on both sides of the

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
5
valve. Drain the process media from
both sides of the valve.
DVent the power actuator loading
pressure and relieve any actuator
spring precompression.
DUse lock-out procedures to be
sure that the above measures stay in
effect while you work on the
equipment.
DThe 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.
DCheck with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
WARNING
Refer to table 4 for valve assembly
weights and the appropriate actuator
instruction manual for actuator
assembly weights. Due to the size and
weight of the valve and actuator
assembly, be sure adequately sized
hoists and chains or slings are used to
handle it. Also, take proper
precautions to prevent personnel from
being injured if the hoist or rigging
slips unexpectedly.
Note
Whenever a gasket seal is disturbed
by removing or shifting gasketed
parts, install a new gasket upon
reassembly. This is necessary to
ensure a good gasket seal.
8. After all maintenance is complete, refer to the
Trim Replacement procedure to assemble the valve
body.
Note
If the valve has ENVIRO-SEALr
live-loaded packing installed, see the
Fisher instruction manual titled
ENVIRO-SEAL Packing System for
Figure 2. Lubricator and Lubricator/Isolating Valve
LUBRICATOR
LUBRICATOR/ISOLATING VALVE
10A9421-A
AJ5428-D
A0832-2/IL
14
14
27
Sliding-Stem Valves for packing
instructions.
If the valve has HIGH-SEAL live-loaded
packing installed, see the Fisher
instruction manual titled HIGH-SEAL
Live-Loaded Packing System for
instructions.
Packing Lubrication
WARNING
To avoid personal injury or property
damage resulting from fire or
explosion, do not lubricate packing
used in oxygen service or in
processes with temperatures over
260_C (500_F).
Note
ENVIRO-SEAL or HIGH-SEAL packing
does not require lubrication.
A lubricator or lubricator/isolating valve (figure 2) is
recommended for PTFE-impregnated composition
packing. The lubricator or lubricator/isolating valve is
installed in place of the pipe plug in the bonnet. Use
a good quality silicon-base lubricant. Do not lubricate
packing used in oxygen service or in processes with
temperatures over 260_C (500_F). To operate the
lubricator, turn the cap screw clockwise to force
lubricant into the packing box. The

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
6
lubricator/isolating valve operates the same way
except open the isolating valve before turning the
cap screw and then close the isolating valve after
lubrication is completed.
Packing Maintenance
WARNING
Personal injury could result from
packing leakage. Valve packing was
tightened before shipment; however,
the packing might require
readjustment to meet specific service
conditions.
Valves with ENVIRO-SEAL live-loaded packing or
HIGH-SEAL live-loaded packing installed probably
will not require this initial re-adjustment. See the
Fisher instruction manuals titled ENVIRO-SEAL
Packing System for Sliding-Stem Valves or
HIGH-SEAL Live-Loaded Packing System (as
appropriate) for packing instructions. To convert an
existing packing arrangement to ENVIRO-SEAL
packing, refer to the retrofit kits listed in the parts kit
sub-section near the end of this manual. Figure 10
shows typical ENVIRO-SEAL packing systems.
For spring-loaded PTFE V-ring packing (figure 4),
the spring maintains a sealing force on the packing.
If leakage is noted around the packing follower
(key 13, figure 11), check to be sure the shoulder on
the packing follower is touching the bonnet (key 1,
figure 11). If the shoulder is not touching the bonnet,
tighten the packing flange nuts (key 5, figure 11)
until the shoulder on the packing follower is against
the bonnet. If the packing leakage is still excessive,
replace the packing by following the Replacing
Packing procedure.
If packing leakage is undesirable with other than
spring-loaded PTFE V-ring packing, first try to limit
the leakage and establish a stem seal by tightening
the packing flange nuts (key 5, figure 11) to at least
the minimum recommended torque in table 5.
However, do not exceed the maximum
recommended torque in table 5 or excessive friction
may result.
Table 5. Recommended Packing Flange Nut Torques
STEM
DIAMETER VALVE
RATING
NSm LbfSft
mm Inches Min Max Min Max
31.8 1-1/4 CL1500 68 102 50 75
CL2500 81 122 60 90
50.8 2 CL1500 98 146 72 108
CL2500 115 170 85 125
If the packing is relatively new and tight on the stem,
and if tightening the packing flange nuts does not
stop the leakage, the valve stem may be worn or
nicked so that a seal cannot be made. The surface
finish of a new stem is critical for making a good
packing seal. If the leakage comes from the outside
diameter of the packing, the leakage may be caused
by nicks or scratches around the packing box wall.
While replacing the packing according to the
Replacing Packing procedure, inspect the stem and
packing box wall for nicks or scratches.
Replacing Packing
WARNING
Refer to the WARNING at the
beginning of the Maintenance section
in this instruction manual.
Key numbers referred to in this procedure are shown
in figure 11 unless otherwise indicated.
1. Remove the stem connector cap screws shown in
figure 3, and separate the two halves of the stem
connector. Then exhaust all actuator pressure, if any
was applied, and disconnect the actuator supply and
any leakoff piping.
2. Remove the hex nuts (key 26) and remove the
actuator from the bonnet (key 1). Loosen the
packing flange nuts (key 5) so that the packing
(key 6, or 7 and 9, figure 4) is not tight on the valve
plug stem (key 4, figure 12 or 13). Remove any
travel indicator disk and stem locknuts from the
valve plug stem threads.
WARNING
Do not remove a stuck bonnet by
pulling on it with equipment that can
stretch or store energy in any other
manner. The sudden release of stored
energy can cause uncontrolled
movement of the bonnet. To avoid

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
7
personal injury or property damage
caused by uncontrolled movement of
the bonnet, loosen the bonnet by
following the instructions in the next
step.
Note
The following step also provides
additional assurance that the valve
fluid pressure has been relieved.
3. Hex nuts (key 14, figures 12 and 13) attach the
bonnet to the valve body. Loosen these nuts
approximately 3 mm (1/8 inch). Then loosen the
body-to-bonnet gasketed joint by either rocking the
bonnet or prying between the bonnet and valve body.
Work the prying tool around the bonnet until the
bonnet loosens. If no fluid leaks from the joint, proceed
with the bonnet removal in step 5.
WARNING
If the cage sticks to the bonnet,
proceed carefully with bonnet removal
until the cage windows are accessible.
Do not extend hands or arms through
the windows at this point as a sudden
separation of bonnet and cage will
cause personal injury. Use a stick or
other device to thread a rope or sling
through the windows. Use this rigging
to secure the cage to the bonnet or
hoist to prevent damage or injury
should the cage suddenly separate
from the bonnet.
CAUTION
When lifting the bonnet (key 1), be
sure that the valve plug and stem
assembly (keys 3 and 4, figure 12
or 13) remains on the seat ring (key 6,
figure 12 or 13). This avoids damage to
the seating surfaces as a result of the
assembly dropping from the bonnet
after being lifted part way out. The
parts are also easier to handle
separately.
4. Remove the hex nuts (key 14, figure 12 or 13)
and washers (key 29, figure 12 or 13). Carefully lift
Figure 3. Actuator Mounting
ANTI-ROTATION GROOVE
TRAVEL INDICATOR
STEM CONNECTOR
POINTER
STEM LOCKNUTS
MOUNTING STUDS & NUTS
STEM
CONNECTOR
CAP SCREWS
15A4691-A
A2359-2 / IL
the bonnet off the valve plug stem. If the valve plug
assembly starts to lift with the bonnet, use a brass or
similar hammer to tap the end of the stem and tap it
back down. Set the bonnet on a protective surface to
prevent damage to the bonnet gasket surface.
CAUTION
Use care to avoid damaging gasket
sealing surfaces.
EHD piston rings (key 8) are brittle and
in two pieces. Use care to avoid
damage to the piston rings caused by
dropping or rough handling.
5. Lift the plug assembly (keys 3 and 4, figure 12
or 13) out of the valve body.
6. To remove the cage (key 2, figure 12 or 13), if it
remained in the valve body, install eyebolts or similar
devices into the 1/2 inch 13-UNC tapped holes in the
top of the cage. Using the eyebolts, carefully lift the
cage out of the valve body. Remove the top and
bottom cage gaskets (key 11, figure 12 or 13).
Carefully remove any residual silver or tin from the
gasket surfaces.
7. Cover the opening in the valve body to protect
the gasket surface and to prevent foreign material
from getting into the valve body cavity.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
8
Fi
g
ure 4. Packin
g
Arran
g
ements
GRAPHITE
LAMINATE
PACKING RING
(KEY 7)
UPPER WIPER (KEY 12)
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
FEMALE ADAP-
TOR
(KEY 32)
V-RING (KEY 7)
MALE ADAPTOR
(KEY 31)
WASHER (KEY 10)
SPRING (KEY 8)
PACKING BOX RING
(KEY 11)
LOWER WIPER
(KEY 30)
KEY 6
1
2
PACKING FOLLOWER
(KEY 13)
GRAPHITE LAMINATE
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 9)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
3
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
12A8160-A / IL 14A3412-B / IL 13A0112-A / IL
PTFE V‐RING
SINGLE PACKING
GRAPHITE LAMINATE AND FILAMENT
SINGLE PACKING
GRAPHITE/COMPOSITION
DOUBLE PACKING
UPPER WIPER (KEY 12) UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
FEMALE ADAP-
TOR
(KEY 32)
V-RING (KEY 7)
MALE ADAPTOR
(KEY 31)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
LOWER WIPER
(KEY 30)
KEY 6
1
2
PACKING FOLLOWER
(KEY 13)
GRAPHITE LAMINATE
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 9)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
3
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
12A7839-A / IL
Sht 1 14A3414-B / IL 12A8163-A / IL
PTFE V‐RING
DOUBLE PACKING
GRAPHITE LAMINATE AND FILAMENT
DOUBLE PACKING
PTFE/COMPOSITION
DOUBLE PACKING
UPPER WIPER (KEY 12)
PACKING FOLLOWER
(KEY 13)
PACKING RING
(KEY 7)
LANTERN RING
(KEY 8)
PACKING BOX RING
(KEY 11)
1
2
PACKING
FOLLOWER
(KEY 13)
GRAPHITE
FILAMENT
PACKING RING
(KEY 9)
LANTERN RING
(KEY 8)
PACKING
BOX RING
(KEY 11)
3
1
1
14A3419-B / IL 14A3418-A / IL
13A0029-A / IL
1
GRAPHITE
LAMINATE
PACKING RING
(KEY 7) 2
PACKING
FOLLOWER
(KEY 13)
GRAPHITE
FILAMENT
PACKING RING
(KEY 9)
LANTERN RING
(KEY 8)
PACKING
BOX RING
(KEY 11)
3
GRAPHITE LAMINATE AND FILAMENT
SINGLE PACKING
GRAPHITE LAMINATE AND FILAMENT
DOUBLE PACKING
GRAPHITE/COMPOSITION AND PTFE/
COMPOSITION DOUBLE PACKING
PACKING ARRANGEMENTS FOR 31.8 mm (1‐1/4 INCH) VALVE STEMS
PACKING ARRANGEMENTS FOR 50.8 mm (2‐INCH) VALVE STEMS
NOTES:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS.
USE ONLY ONE BELOW EACH GRAPHITE LAMINATE RING.
HAS THE APPEARANCE OF FLAT WASHERS PRESSED TOGETHER.
HAS THE APPEARANCE OF A WOVEN OR BRAIDED RING.
12
3
C0634-1 / IL

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
9
Table 6. Body-to-Bonnet Bolting Torques
VALVE
SIZE
NPS
VALVE
RATING
B7, B16, BD, 660
STUDS B8, B8M STUDS
NSm lbfSft NSm lbfSft
8, 10 CL1500 2710 2000 2035 1500
CL2500 4070 3000 3050 2250
12, 14 CL1500 8130 6000 6100 4500
CL2500 5830 4300 4370 3225
8. Remove the packing flange nuts, packing flange,
upper wiper and packing follower. Carefully push out
all the remaining packing parts from the valve side of
the bonnet using a rounded rod or other tool that will
not scratch the packing box wall. Clean the packing
box and these metal packing parts shown in the
figure 4 arrangements: packing box ring, spring,
lantern ring, washer if used, and packing follower
(keys 11, 8, 10, and 13).
9. Inspect the valve plug stem threads for any sharp
edges that might cut the packing. Use a whetstone
or emery cloth to smooth the threads if necessary.
10. Remove the protective covering from the valve
body cavity, and install the cage using new cage
gaskets (key 11, figure 12 or 13).
11. Install the plug and stem assembly. Be sure the
seal ring or piston rings are installed correctly as
described under Trim Replacement.
12. Slide the bonnet over the stem and onto the
bonnet studs (key 13, figure 12 or 13).
Note
Proper performance of the bolting
procedures in step 14 compresses the
cage gaskets (key 11, figure 12 or 13)
enough to seal the body-to-bonnet
joint.
The prelubricated hex nuts (key 14,
figure 12 or 13) referred to in step 14
can be identified by a black film
coating on the nut threads.
The proper bolting procedures in step
14 include, but are not limited to,
ensuring that the bonnet stud threads
are clean, and that the hex nuts are
evenly tightened to the specified
torque values.
CAUTION
Failure to comply with good
bonnet-to-body bolting practices and
the torque values shown in table 6 may
result in cage crushing, cage diameter
reduction, and/or bonnet deformation.
Do not use cheater bars or slug
wrenches for this procedure.
Hot torquing is not recommended; it
may result in damage to valve
components.
13. Lubricate the stud threads and the faces of the
hex nuts (key 14, figure 12 or 13) with anti-seize
lubricant (not necessary if new factory prelubricated
hex nuts are used). Replace the washers and hex
nuts but do not tighten them. Torque the nuts in a
crisscross pattern to no more than 1/4 of the nominal
torque value specified in table 6. When all nuts are
tightened to that torque value, increase the torque
by 1/4 of the specified nominal torque and repeat the
crisscross pattern. Repeat this procedure until all
nuts are tightened to the specified nominal value.
Apply the final torque value again and, if any nut still
turns, tighten every nut again.
14. Install new packing and the metal packing box
parts according to the appropriate arrangement in
figure 4. Slip a smooth-edged pipe over the valve
stem, and gently tamp each soft packing part into
the packing box.
15. Slide the packing follower, wiper, and packing
flange into position. Lubricate the packing flange
studs (key 4) and the faces of the packing flange
nuts (key 5) and then install the packing flange nuts.
For spring-loaded PTFE V-ring packing: Tighten
the packing flange nuts until the shoulder on the
packing follower (key 13) contacts the bonnet
(key 1).
For other kinds of packing, except ENVIRO-SEAL
and HIGH-SEAL: Tighten the packing flange nuts to
the maximum recommended torque shown in
table 5. Then, loosen the packing flange nuts and
retighten them to the recommended minimum torque
in table 5.
For ENVIRO-SEAL and HIGH-SEAL packing: See
the Fisher instruction manuals titled ENVIRO-SEAL
Packing System for Sliding-Stem Valves or
HIGH-SEAL Live-Loaded Packing System (as
appropriate) for packing instructions.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
10
Table 7. Seat Ring and Seat Ring Cap Screw Lubricants and Recommended Torque for Seat Ring Cap Screws
LUBRICANT
VALVE
SIZE,
NPS
VALVE
RATING
RECOMMENDED TORQUE
Spiral Wound
Gasket Construction
O-Ring Construction or
Constructions for
Sour Gas Service
NSm lbfSft NSm lbfSft
Lithium Grease or
Anti-Seize
Lubricant
8, 10 CL1500 61 45 41 30
CL2500 95 70 61 45
12, 14 CL1500 95 70 61 45
CL2500 95 70 61 45
Dry Film
Lubricant
8, 10 CL1500 47 35 34 25
CL2500 75 55 47 35
12, 14 CL1500 75 55 47 35
CL2500 75 55 47 35
16. Mount the actuator on the valve body assembly,
and reconnect the actuator and valve plug stem
according to the Actuator Mounting procedure. After
the control valve is returned to service, retighten the
hex nuts (key 14, figure 12 or 13) to the torque
recommended in table 6.
Trim Removal
WARNING
Refer to the WARNING at the
beginning of the Maintenance section
in this instruction manual.
For Bore seal construction, see the appropriate Bore
seal sections in this instruction manual.
Key numbers referenced in this procedure are
shown in figure 12 for the EHD valve and figure 13
for the EHT valve except where indicated.
1. Remove the actuator and bonnet by following
steps 1 through 9 of the Replacing Packing
procedure.
2. To remove the seat ring (key 6), remove the cap
screws (key 7). Install eyebolts or similar devices in
the 5/8 inch 11-UNC tapped holes (9/16 inch
12-UNC for an NPS 8 or 10 CL1500 valve). Use the
eyebolts to carefully lift the seat ring out of the valve
body. If the seat ring is to be reused, exercise care
to protect the gasket surfaces on the bottom of the
seat ring.
3. Remove the spiral wound seat ring gasket or
O-ring (key 12).
4. Refer to the following appropriate valve plug
maintenance procedure or to the Lapping Seats
procedure.
EHD and EHT Valve Plug Maintenance
Key numbers used in this procedure are shown in
figure 12 for the EHD valve and in figure 13 for the
EHT valve.
1. With the valve plug (key 3) removed per the Trim
Removal procedure, proceed as appropriate:
For the EHD valve, the piston rings (key 8) are each
in two sections; remove the sections from the
grooves in the valve plug.
For all EHT valves, work the retaining ring (key 10)
off the valve plug with a screwdriver. Carefully slide
the backup ring and seal ring (keys 9 and 8) off the
valve plug. Additionally, for the EHT valve with
Whisper Trim Level D cage, remove the two sections
of the piston ring (key 30, figure 13).
2. To replace the valve plug stem (key 4), drive out
the pin (key 5) and unscrew the stem from the valve
plug (key 3).
CAUTION
Never reuse an old stem with a new
valve plug. Using an old stem with a
new plug requires drilling a new pin
hole in the stem. This weakens the
stem and may cause the stem to fail in
service. If a new valve plug is required,
always order a valve plug, stem, and
pin as an assembly. Specify the
correct part number of each of the
three parts but state that the parts are
being ordered as an assembly.
A used valve plug may be reused with
a new stem.
3. Thread the new stem into the valve plug until the
stem wedges tightly at the end of the thread. Using

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
11
the valve plug pin hole as a guide, drill the pin hole
through the stem. Use a 1/4 inch drill for 31.8 mm
(1-1/4 inch) stems and a 3/8 inch drill for 50.8 mm
(2-inch) stems.
4. Drive in the pin to lock the assembly.
5. If seat lapping is necessary, complete the
Lapping Seats procedure before installing the EHD
piston rings or the EHT seal ring. Piston ring and
seal ring installation instructions and valve
body-to-bonnet reassembly instructions are
presented in the Trim Replacement procedure.
Lapping Seats
Key numbers referenced in this procedure are
shown in figure 12 for the EHD valve and in figure 13
for the EHT valve.
A certain amount of leakage should be expected
with metal-to-metal seating in any valve. If the
leakage becomes excessive, however, the condition
of the seating surfaces of the valve plug (key 3) and
seat ring (key 6) can be improved by lapping. (Deep
nicks should be machined out rather than ground
out.) Use a good quality lapping compound with a
mixture that contains 280 to 600 grit. Apply the
compound to the bottom of the valve plug.
Use the following procedure to lap the seating
surfaces.
1. For all designs, install the seat ring gasket or
O-ring (key 12), seat ring (key 6), seat ring cap
screws (key 7), lower cage gasket (key 12), cage
(key 2), and upper cage gasket (key 12) into the
valve body per the instructions in the Trim
Replacement procedure.
2. Install the assembled valve plug and stem
(keys 3 and 4)--without piston rings or seal ring
(key 8)-- into the cage.
3. For all seating surfaces, install the bonnet (key 1,
figure 11) over the valve stem and secure the bonnet
with four of the hex nuts (key 14).
4. Attach a handle, such as a piece of strap iron
secured by stem locknuts, to the valve plug stem.
Rotate the handle alternately in each direction to lap
the seats.
Note
In order to preserve the effects of
lapping, do not change either the
position of the seat ring in the valve
body cavity or the position of the cage
on the seat ring after lapping the
seating surfaces. If possible, clean the
parts without disturbing their
positions. If the parts must be
removed for cleaning, return them to
the original positions.
5. After lapping, again disassemble as necessary,
clean the seating surfaces, reassemble, and test for
shutoff. Repeat the lapping procedure if necessary.
Trim Replacement
After all trim maintenance has been completed,
reassemble the valve by following the numbered
steps below. Be certain that all gasketed surfaces
are clean. Key numbers referenced in this procedure
are shown in figure 12 for the EHD valve and in
figure 13 for the EHT valve.
CAUTION
Thoroughly clean the seat ring (key 6),
the seat ring cap screws (key 7), and
the cap screw threads in the valve
body with a good-quality degreaser.
Unless the valve is to be used for
oxygen service, thoroughly lubricate
the cap screw threads and the
underside of the cap screw heads with
one of the lubricants (or equivalent)
shown in table 7.
Failure to lubricate as described may
cause galling and improper seat ring
gasket or O-ring (key 12) loading
which may result in leakage.
WARNING
If the control valve is to be used for
oxygen service, use the lubrication
procedure above, but substitute a
lubricant that has been approved for
oxygen service. Use of unapproved
lubricants creates a fire or explosion
hazard.
1. Install either the seat ring gasket or the O-ring
(key 12). Place the O-ring in the O-ring groove in the
seat ring before installing the seat ring in the valve
body. Install the seat ring (key 6) and secure it with
the seat ring cap screws (key 7). Torque the hex
socket head cap screws in a criss-cross pattern with
no more than 20 NSm (15 lbfSft) of torque. When all
are tightened to 20 NSm (15 lbfSft), increase the
torque 20 NSm (15 lbfSft) without exceeding the
torque value specified in table 7, and repeat the

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
12
crisscross pattern. Repeat until all cap screws are
tightened to the torque value specified in table 7.
Repeat the final torque and if any cap screw still
turns, tighten every cap screw again.
2. Install one of the cage gaskets (key 11) between
the valve body and cage (key 2), and install the
cage.
3. If the cage used has multiple sizes of windows,
attempt to orient the largest window toward the valve
body web (a shelf-like projection of the casting into
the flow cavity). As an alternate reference, orient the
largest window toward the process outlet for a
flow-down and toward the process inlet for a flow-up
valve.
4. Inspect the valve plug stem threads for any sharp
edges that might cut the packing. Use a whetstone
or emery cloth to smooth the threads if necessary.
5. To install the piston rings or seal ring (key 8),
proceed as appropriate:
For an EHD valve, if installing a new piston ring, the
replacement piston ring will arrive in one piece. Use
a vise with smooth or taped jaws to break this
replacement piston ring into halves. Place the new
ring in the vise so that the jaws compress the ring
into an oval. Slowly compress the ring until the ring
snaps on both sides. If one side snaps first, do not
try to tear or cut the other side. Instead, keep
compressing until the other side snaps.
Remove any protective tape or covering from the
valve plug and stem assembly, and set it on a
protective surface. Then place the piston ring in the
piston ring groove with the fractured ends matched.
For an EHT valve, install the seal ring (key 8) onto
the valve plug (key 3). Install the ring with the open
side facing the seat ring end of the valve plug for a
flow-down application (view B of figure 13) or with
the open side facing the valve stem end of the valve
plug for a flow-up application. Slide the backup ring
(key 9) onto the valve plug. Secure with the retaining
ring (key 10). For an EHT valve with a Whisper Trim
Level D cage, install the piston ring (key 30,
figure 13) using the procedure given in the EHD
instructions immediately preceding this paragraph.
6. Install the valve plug into the cage.
7. Install the other cage gasket (key 11) between
the cage and the bonnet.
CAUTION
Failure to comply with good
bonnet-to-body bolting practices and
the torque values shown in table 6 may
result in cage crushing, cage diameter
reduction, and/or bonnet deformation.
Cheater bars or slug wrenches should
not be used for this procedure.
Hot torquing is not recommended; it
may result in damage to valve
components.
8. Install the bonnet over the valve stem and onto
the valve body. Lubricate the threads of the studs
(key 13) and the faces of the hex nuts (key 14) with
anti-seize lubricant (key 24). Secure the bonnet with
hex nuts (key 14) and washers (key 29). Torque the
nuts in a crisscross pattern to no more than 1/4 of
the nominal torque value specified in table 6. When
all nuts are tightened to that torque value, increase
the torque by 1/4 of the specified torque value and
repeat the crisscross pattern. Repeat this procedure
until all nuts are tightened to the specified nominal
value. Repeat the final torque value and if any nut
still turns, tighten every nut again.
9. Install new packing and the metal packing box
parts according to the appropriate arrangement in
figure 4. Slip a smooth-edged pipe over the valve
stem, and gently tamp each soft packing part into
the packing box.
10. Slide the packing follower, wiper, and packing
flange into position. Lubricate the packing flange
studs (key 4) and the faces of the packing flange
nuts (key 5) and then install the packing flange nuts.
For spring-loaded PTFE V-ring packing: Tighten
the packing flange nuts until the shoulder on the
packing follower (key 13) contacts the bonnet
(key 1).
For other kinds of packing, except ENVIRO-SEAL
and HIGH-SEAL: Tighten the packing flange nuts to
the maximum recommended torque shown in
table 5. Then, loosen the packing flange nuts and
retighten them to the recommended minimum torque
in table 5.
For ENVIRO-SEAL and HIGH-SEAL packing: See
the Fisher instruction manuals titled ENVIRO-SEAL
Packing System for Sliding-Stem Valves or
HIGH-SEAL Live-Loaded Packing System (as
appropriate) for packing instructions.
11. Mount the actuator by following the Actuator
Mounting procedure. Check for packing leakage as
the valve is being put into service. Retorque the
packing flange nuts as required (see table 5). Then,
retighten the hex nuts (key 14) to the torque shown
in table 6.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
13
Figure 5. FisherrEHD with Bore Seal Trim
FLOW DOWN
FLOW UP
PLUG
RETAINER
BORE SEAL
PISTON RING
CAGE
RETAINER
CAGE
BORE SEAL
PLUG
SEATING AREA
PISTON RING
SEATING AREA
A
VIEW A
Retrofit: Installing Bore Seal Trim
Note
Additional actuator thrust is required
for a valve with Bore Seal trim. When
installing Bore Seal trim in an existing
valve, contact your Emerson Process
Management sales office for
assistance in determining new
actuator thrust requirements.
Assemble the new valve plug/retainer assembly
(with Bore Seal plug seal) using the following
instructions:
CAUTION
To avoid leakage when the valve is
returned to service, use appropriate
methods and materials to protect all
sealing surfaces of the new trim parts
while assembling the individual parts
and during installation in the valve
body.
1. Apply a suitable high-temperature lubricant to the
inside diameter of the Bore Seal plug seal. Also,
lubricate the outside diameter of the valve plug
where the Bore Seal plug seal must be pressed into
the proper sealing position (figure 5).

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
14
FOR VALVE
PLUGS
FITTING
PORT SIZE
(Inches)
DIMENSIONS, INCHES
(See Drawing Below)
PART
NUMBER
(To Order
A Tool)
A B C D E F G H
2.875 3.25 2.060 - 2.070 0.196 - 0.198 0.146 - 0.148 1.62 2.074 - 2.078 2.170 - 2.190 2.791 - 2.797 24B9816X012
3.4375 4.00 2.310 - 2.320 0.196 - 0.198 0.146 - 0.148 2.00 2.402 - 2.406 2.498 - 2.518 3.353 - 3.359 24B5612X012
3.625 4.11 2.560 - 2.570 0.196 - 0.198 0.146 - 0.148 2.00 2.714 - 2.718 2.810 - 2.830 3.541 - 3.547 24B3630X012
4.375 4.96 3.285 - 3.295 0.196 - 0.198 0.146 - 0.148 2.00 3.439 - 3.443 3.535 - 3.555 4.291 - 4.297 24B3635X012
5.375 5.62 3.940 - 3.950 0.196 - 0.198 0.146 - 0.148 1.81 4.088 - 4.092 4.184 - 4.204 5.048 - 5.054 23B9193X012
7 7.25 5.566 - 5.576 0.196 - 0.198 0.146 - 0.148 2.37 5.714 - 5.718 5.810 - 5.830 6.674 - 6.680 23B9180X012
8 8.25 6.566 - 6.576 0.196 - 0.198 0.146 - 0.148 2.20 6.714 - 6.718 6.810 - 6.830 7.674 - 7.680 24B9856X012
Figure 6. Bore Seal Plug Seal Installation Tool
45qX 0.06
A
B
8q- 9q
D
C
F
G
H
E
BREAK SHARP
CORNER
45qX 0.01 MAX
45qX 0.02
A6777 / IL
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉ
2. Orient the Bore Seal plug seal for correct sealing
action based on the process fluid flow direction
through the valve.
DThe open interior of the Bore Seal plug seal
must face up in a valve with flow-up construction
(figure 5).
DThe open interior of the Bore Seal plug seal
must face down in a valve with flow-down
construction (figure 5).
Note
An installation tool must be used to
properly position the Bore Seal plug
seal on the valve plug. A tool is
available as a spare part from Emerson
Process Management or a tool could
be manufactured following the
dimensions given in figure 6.
3. Place the Bore Seal plug seal over the top of the
valve plug and press the Bore Seal plug seal onto
the plug using the Bore Seal installation tool.
Carefully press the Bore Seal plug seal onto the plug
until the installation tool contacts the horizontal
reference surface of the valve plug (figure 8).
4. Apply a suitable high-temperature lubricant to the
threads on the plug. Then, place the Bore Seal
retainer onto the plug and tighten the retainer using
an appropriate tool such as a strap wrench.
5. Using an appropriate tool such as a center
punch, stake the threads on top of the plug in one
place (figure 7) to secure the Bore Seal retainer.
6. Install the new plug/retainer assembly with Bore
Seal plug seal on the new stem following the

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
15
appropriate instructions in the Trim Replacement
section of this manual.
7. Install piston rings by following instructions in the
Trim Replacement section of this manual.
8. Remove the existing valve actuator and bonnet
following the appropriate instructions in the
Replacing Packing section of this manual.
CAUTION
Do not remove the existing valve stem
from the valve plug unless you are
planning to replace the valve stem.
Never reuse an old valve stem with a
new plug or reinstall a valve stem after
it has been removed. Replacing a valve
stem requires drilling a new pin hole in
the stem. This drilling weakens the
stem and may cause failure in service.
However, a used valve plug may be
reused with a new valve stem.
9. Remove the existing valve stem and plug, cage,
and seat ring from the valve body following the
appropriate instructions in the Trim Removal section
of this manual.
10. Replace all gaskets according to appropriate
instructions in the Trim Replacement section of this
manual.
11. Install the new seat ring, cage, valve
plug/retainer assembly, and stem into the valve body
and completely reassemble the valve package
following the appropriate instructions in the Trim
Replacement section of this manual.
CAUTION
To avoid excessive leakage and seat
erosion, the valve plug must be
initially seated with sufficient force to
overcome the resistance of the Bore
Seal plug seal and contact the seat
ring. You can correctly seat the valve
plug by using the same force
calculated for full load when sizing
your actuator. With no pressure drop
across the valve, this force will
adequately drive the valve plug to the
seat ring, thus giving the Bore Seal
plug seal a predetermined permanent
set. Once this is done, the
plug/retainer assembly, the cage, and
the seat ring become a matched set.
With full actuator force applied and the
valve plug fully seated, align the
actuator travel indicator scale with the
lower end of valve travel. Refer to the
appropriate actuator instruction
manual for information on this
procedure.
Replacement of Installed Bore Seal
Trim
Trim Removal (Bore Seal Constructions)
1. Remove the valve actuator and bonnet following
the appropriate instructions in the Replacing Packing
section of this manual.
CAUTION
To avoid leakage when the valve is
returned to service, use appropriate
methods and materials to protect all
sealing surfaces of the trim parts
during maintenance.
Use caution when removing piston
ring(s) and the Bore Seal plug seal to
avoid scratching any sealing surface.
CAUTION
Do not remove the valve stem from the
plug/retainer assembly unless you are
planning to replace the valve stem.
Never reuse an old valve stem with a
new plug or reinstall a valve stem after
it has been removed. Replacing a valve
stem requires drilling a new pin hole in
the stem. This drilling weakens the
stem and may cause failure in service.
However, a used valve plug may be
reused with a new valve stem.
2. Remove the plug/retainer assembly (with Bore
Seal plug seal), cage, and seat ring from the valve
body following the appropriate instructions in the
Trim Removal section of this manual.
3. Locate the staked thread on top of the valve plug
(figure 7). The staked thread secures the retainer.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
16
Figure 7. Stake the Threads of the Bore Seal Retainer
Bore Seal
METAL
PLUG
SEAL VALVE
PLUG
FLOW DOWN
PISTON
RING
RETAINER
DEFORM THREAD TO
STAKE Bore Seal RETAINER
A6779 / IL
Use a drill with a 1/8 inch bit to drill out the staked
area of the thread. Drill approximately 1/8 inch into
the metal to remove the staking.
4. Locate the break between sections of the piston
ring(s). Using an appropriate tool such as a
flat-blade screwdriver, carefully pry out the piston
ring(s) from the groove(s) in the Bore Seal retainer.
5. After removing the piston ring(s), locate
the 1/4-inch diameter hole in the groove. In a
retainer with two piston ring grooves, the hole will be
found in the upper groove.
6. Select an appropriate tool such as a punch and
place the tip of the tool into the hole with the body of
the tool held tangent to the outside diameter of the
retainer. Strike the tool with a hammer to rotate the
retainer and free it from the valve plug. Remove the
retainer from the plug.
7. Use an appropriate tool such as a flat-blade
screwdriver to pry the Bore Seal plug seal off the
plug. Use caution to avoid scratches or other
damage to the sealing surfaces where the Bore Seal
plug seal makes contact with the valve plug
(figure 9).
8. Inspect the lower seating surface where the valve
plug contacts the seat ring for wear or damage
which would prevent proper operation of the valve.
Also, inspect the upper seating surface inside the
cage where the Bore Seal plug seal contacts the
Figure 8. Installing the Bore Seal Plug Seal
Using the Installation Tool
Bore Seal
METAL
PLUG
SEAL
INSTALLATION
TOOL
A6778 / IL
VALVE
PLUG
HORIZONTAL
REFERENCE
SURFACE
FLOW DOWN
NOTE: PRESS THE INSTALLATION TOOL OVER THE VALVE PLUG UNTIL THE
TOOL CONTACTS THE HORIZONTAL REFERENCE SURFACE OF THE VALVE
PLUG.
cage, and inspect the sealing surface where the
Bore Seal plug seal makes contact with the plug
(figure 9).
9. Replace or repair trim parts according to the
following procedure for lapping metal seats,
remachining metal seats, or other valve plug
maintenance procedures as appropriate.
Lapping Metal Seats
(Bore Seal Constructions)
Before installing a new Bore Seal plug seal, lap the
lower seating surface (valve plug to seat ring,
figure 9) following appropriate procedures in the
Lapping Seats section of this manual.
Remachining Metal Seats
(Bore Seal Constructions)
A valve plug with a Bore Seal metal plug seal
features two seating surfaces. One seating surface
is found where the valve plug contacts the seat ring.
The second seating surface is found where the Bore
Seal plug seal contacts the upper seating surface in
the cage. The cage does not require any machining,
even when the plug and / or seat ring have been
machined.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
17
Figure 9. Lower (Valve Plug to Seat Ring) and Upper
(Bore Seal Plug Seal to Cage) Seating Surfaces
NOTE:
UPPER SEATING SURFACE IS THE AREA OF
CONTACT BETWEEN THE BORE SEAL METAL
PLUG SEAL AND THE CAGE.
PLUG
CAGE
SEAT
RING
UPPER SEATING SURFACE
LOWER SEATING SURFACE
A6780 / IL
1
1
PISTON
RING
RETAINER
CAGE
BORE SEAL
PLUG
SEATING AREA
Trim Replacement (Bore Seal
Constructions)
1. Apply a suitable high-temperature lubricant to the
inside diameter of the Bore Seal plug seal. Also,
lubricate the outside diameter of the valve plug
where the Bore Seal plug seal must be pressed into
the proper sealing position (figure 5).
2. Orient the Bore Seal plug seal for correct sealing
action based on the process fluid flow direction
through the valve.
DThe open interior of the Bore Seal plug seal
must face up in a valve with flow-up construction
(figure 5).
DThe open interior of the Bore Seal plug seal
must face down in a valve with flow-down
construction (figure 5).
Note
An installation tool must be used to
properly position the Bore Seal plug
seal on the valve plug. A tool is
available as a spare part from Emerson
Process Management or a tool could
be manufactured following the
dimensions given in figure 6.
3. Place the Bore Seal plug seal over the top of the
valve plug and press it onto the plug using the
installation tool. Carefully press the Bore Seal plug
seal onto the plug until the installation tool contacts
the horizontal reference surface of the valve plug
(figure 8).
4. Apply a suitable high-temperature lubricant to the
threads on the plug. Then, place the Bore Seal
retainer onto the plug and tighten the retainer using
an appropriate tool such as a strap wrench.
5. Using an appropriate tool such as a center
punch, stake the threads on top of the plug in one
place (figure 7) to secure the Bore Seal retainer.
6. Replace the piston ring(s) following instructions in
the Trim Replacement section of this manual.
7. Return the seat ring, cage, plug/retainer
assembly, and stem to the valve body and
completely reassemble the valve package following
the appropriate instructions in the Trim Replacement
section of this manual.
CAUTION
To avoid excessive leakage and seat
erosion, the valve plug must be
initially seated with sufficient force to
overcome the resistance of the Bore
Seal plug seal and contact the seat
ring. You can correctly seat the valve
plug by using the same force
calculated for full load when sizing
your actuator. With no pressure drop
across the valve, this force will
adequately drive the valve plug to the
seat ring, thus giving the Bore Seal
plug seal a predetermined permanent
set. Once this is done, the
plug/retainer assembly, the cage, and
the seat ring become a matched set.
With full actuator force applied and the
valve plug fully seated, align the
actuator travel indicator scale with the
lower end of valve travel. Refer to the
appropriate actuator instruction
manual for information on this
procedure.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
18
Actuator Mounting
The following procedure assumes that the valve and
actuator are fully assembled, but with the actuator
removed from the valve. Unless otherwise identified,
the parts involved in making up the actuator-valve
stem connection are shown in figure 3.
CAUTION
Never use a wrench or pliers on the
valve plug stem and never turn the
valve plug stem while the valve plug
assembly is seated. A damaged stem
could cut the packing and allow
leakage. Turning the plug while seated
could damage the seats allowing
leakage at shutoff.
1. Turn the stem locknuts onto the valve stem.
2. Move the valve plug to the closed position.
3. Place the actuator on the bonnet and secure with
the hex nuts (key 26, figure 11). Connect supply
pressure to the actuator.
4. Make sure the actuator stem is fully retracted.
With a properly assembled direct-acting
spring-return actuator, spring compression forces
the actuator stem to the fully retracted position. A
double-acting piston actuator or a reverse-acting
spring-return actuator requires air pressure (or a
side-mounted handwheel) to stroke the actuator
stem to the fully retracted position.
5. Extend the actuator stem a distance equal to the
travel (as specified on the nameplate).
6. Attach both halves of the stem connector, making
sure the connector fully engages both the actuator
threads and valve plug stem threads. Install the cap
screws in the stem connector, but tighten them only
slightly at this time.
7. Stroke the valve to the fully open position. The
travel indicator should show the valve to be wide
open. If it does not, loosen the screws that hold the
travel indicator scale, and shift the scale to the
required position.
8. Stroke the valve to the closed position. The travel
indicator should show the valve to be closed.
9. If travel is not correct, lift the valve plug assembly
(key 3, figure 12 or 13) off its seat approximately 6.4
mm (1/4 inch) and screw the valve plug stem into or
out of the stem connector as follows. To lengthen
travel, turn the valve plug stem into the stem
connector slightly. To shorten travel, turn the valve
plug stem out of the stem connector slightly.
(Turning it out too far will limit the stroke.)
10. After adjusting the stem connection so that the
actuator will properly stroke the valve plug assembly,
tighten the cap screws in the stem connector,
tightening the one opposite the anti-rotation groove
first. Then lock the stem locknuts against the stem
connector.
Parts Ordering
Each valve is assigned a serial number, which can
be found on the valve body. This same number also
appears on the actuator nameplate when the valve
is shipped from the factory as part of a control valve
assembly. Refer to the number when contacting your
Emerson Process Management sales office for
technical assistance or when ordering replacement
parts.
When ordering replacement parts, also be sure to
include the 11-character part number for each part
required from the following parts list.
WARNING
Use only genuine Fisher replacement
parts. Components that are not
supplied by Emerson Process
Management should not, under any
circumstances, be used in any Fisher
valve, because they may void your
warranty, might adversely affect the
performance of the valve, and could
cause personal injury and property
damage.
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use, or maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
19
Parts Kits
ENVIRO-SEALrPacking Retrofit Kits
Retrofit kits include parts to convert existing packing
to the ENVIRO-SEAL packing system. PTFE kits
include keys 200, 201, 211, 212, 214, 215, 217, 218,
tag, and cable tie. Graphite kits include keys 200,
201, 207, 208, 209, 210, 211, 212, 214, 216, 217,
tag, and cable tie. Duplex kits include keys 200, 201,
207, 209, 211, 212, 214, 215, 216, 217, tag, and
cable tie. 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 the packing kit.
Stem Diameter
mm (Inches)
Yoke Boss Diameter
mm (Inches)
Kits
Packing Material
Double PTFE Graphite ULF Duplex
31.8 (1-1/4) 127 (5, 5H) RPACKXRT052 RPACKXRT302 RPACKXRT252
ENVIRO-SEALrPacking Repair Kits
Repair kits include parts to replace the ‘‘soft’’
packing materials in valves that already have
ENVIRO-SEAL packing arrangements installed or in
valves that have been upgraded with ENVIRO-SEAL
retrofit kits. PTFE repair kits include keys 214, 215,
and 218. Graphite repair kits include keys 207, 208,
209, 210, and 214. Duplex repair kits include keys
207, 209, 214, and 215.
Stem Diameter
mm (Inches)
Yoke Boss Diameter
mm (Inches)
Kits
Packing Material
Double PTFE Graphite ULF Duplex
31.8 (1-1/4) 127 (5, 5H) RPACKX00232 RPACKX00632 RPACKX00332

EH Valves (NPS 8 through 14)
Instruction Manual
April 2009
20
Figure 10. Live-Loaded Packing
39B4153-A
A6297-1 / IL
Typical HIGH-SEAL ULF Packing System Typical ENVIRO-SEAL Packing System
with PTFE Packing
Typical ENVIRO-SEAL Packing System
with Graphite ULF Packing
Typical ENVIRO-SEAL Packing System
with Duplex Packing
200
212
201
215
216
207
209
211
217
207
207
207
214
213
A6722 / IL
39B4612/A