Emerson Fisher Large ET User manual

www.Fisher.com
FisherrLarge ET and ED Valves
NPS 12 through 16 and NPS 30
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 3.................................
Specifications 4...............................
Installation 4..................................
Maintenance 6................................
Packing Lubrication 7..........................
Packing Maintenance 7.........................
Replacing Packing 9........................
Trim Maintenance 12..........................
Trim Removal 12..........................
Lapping Seating Surfaces 13.................
Valve Plug Maintenance 13..................
Trim Replacement 15.......................
Retrofit: Installing Bore Seal Trim 19..............
Replacement of Installed Bore Seal Trim 21........
Trim Removal (Bore Seal Constructions) 21....
Lapping Metal Seats
(Bore Seal Constructions) 23..............
Remachining Metal Seats
(Bore Seal Constructions) 23..............
Trim Replacement
(Bore Seal Constructions) 23..............
Parts Ordering 24...............................
Parts List 25...................................
Figure 1. Fisher NPS 12 Valve with Piston Actuator
and FIELDVUE™ DVC6200 Digital Valve Controller
X0237-1
Introduction
Scope of Manual
This instruction manual includes installation and maintenance information for NPS 12 through 16 and NPS 30 CL150
through 600 Fisher ET and ED valves.
Refer to separate manuals for instructions covering the actuator and accessories.
Do not install, operate, or maintain an ET or ED 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
D103553X012
Large ET and ED Valves
December 2011

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Large ET and ED Valves
December 2011
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Table 1. Specifications
Valve Sizes
ET and ED: NPS J12, J14, J16 and J30
End Connection Styles
Flanged: CL150, 300, and 600 raised-face or ring-type
joint flanges per ASME B16.5
Buttwelding: All ASME B16.25 schedules through
schedule 120 that are compatible with the
ASME B16.34 valve body rating
For other end connections, contact your Emerson
Process Management sales office for details
Maximum Inlet Pressure and Temperature(1)
Flanged: Consistent with CL150, 300, and 600
pressure/temperature ratings per ASME B16.34
Buttwelding: Consistent with CL600 per ASME B16.34
Also see the Installation section
Shutoff Classifications per ANSI/FCI 70-2 and IEC
60534-4
ET with Metal Seats
Standard: Class V
Optional (for all trims except 2-Stage Cavitrol™ Trim):
Class IV
ED with Metal Seats
Standard: Class IV
Optional: Class V
ET for Cryogenic
Standard: Class IV
Flow Characteristics
Standard Cages: JLinear or Jequal percentage
WhisperFlot,WhisperTrimtIII, and Cavitrol III
Cages: Linear
Flow Direction
Standard and Cavitrol III Cages: Down
WhisperFlo and Whisper Trim III Cages: Up
Port Diameters
NPS 12, 14, and 16 Trim: 279.4 mm (11.00 inches)
and 254 mm (10.00 inches)
NPS 30 Trim: 609.6 mm (24.00 inches)
Valve Plug Travel
102 through 432 mm (4 to 19-7/8 inches).
Contact your Emerson Process Management sales
office for further details if needed
Yoke Boss and Stem Diameters
J127 mm (5H-inch) diameter yoke boss, with 31.8
mm (1-1/4 inch) diameter valve stem for all valves
except NPS 30
J179 mm (7-inch) diameter yoke boss, with 50.8
mm (2 inch) diameter valve stem for NPS 30 valve
Approximate Weights
See table 6
1. Do not exceed the pressure or temperature limits in this manual, on the equipment nameplate, and any applicable code limitations.

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Table 2. WhisperFlo Trim Specifications
Trim Material and Selection
J316 Stainless Steel w/ hardfacing
J410 Stainless Steel, hardened
JOthers per application
Temperature Capability
JET: -73 to 232_C (-100 to 450_F) up to 316_C
(600_F) with HTS1 option
JED: -29 to 538_C (-20 to 1000_F)
JOthers per application
Maximum Pressure Drops
As shown in this bulletin. Also see Bulletin
51.1:Large_ET_ED, Fisher Large ET and ED Valves NPS
12 through 16
WhisperFlo Aerodynamic Trim Pressure Ratings(1,2)
Up to 1500 psi drop
Velocity Limits
WhisperFlo trim is designed for 0.3 MACH as an
inherent outlet velocity limit. Variations higher and
lower may be applied per special applications -
consult your Emerson Process Management sales
office
Flow Characteristic
Linear (restricted linear cages and special,
characterized cages are available--consult your
Emerson Process Management sales office)
Rangeability
65:1
High rangeability in excess of 250:1 is available in
some constructions. Contact your Emerson Process
Management sales office for details
Flow Direction
Standard and Cavitrol III Cages: Down
Whisper Trim III Cages: Up
WhisperFlo Cages: Up
Noise Attenuation
Approximately -40 dBA maximum depending on the
nP/P1ratio per IEC 60534-8-3 calculation procedure
1. Other pressures on application.
2. The pressure/temperature limits in this instruction manual and in any applicable standard limitations should not be exceeded.
Description
Fisher NPS 12 through 16 and NPS 30 CL150 through CL600 ET and ED control valves are used for either throttling or
on-off control of a wide variety of liquids and gasses.
ET valves with a hanging cage are available for demanding applications in oil and natural gas up to 232_C (450_F). The
hanging cage, with the seat ring threaded into the cage, provides the valve with easymaintenance trim. The seal
between the plug and cage and the seal between the seat ring and body are springloaded PTFE. The springloaded
PTFE seal configuration can provide Class V shutoff per ANSI/FCI 702 and IEC 605344. The temperature range can be
extended to 316_C (600_F) for nonoxidizing service and to 260_C (500_F) for oxidizing service by using PEEK (Poly
Ether Ether Ketone) antiextrusion rings in combination with the springloaded PTFE seals.
ED valves also utilize a hanging cage and a seat ring that is bolted into the body. These valves have metaltometal
seating and two graphite piston rings between the cage and plug. They are used for high temperature applications
between 316_C (600_F) and 593_C (1100_F) with a Class IV standard shutoff. Shutoff can be increased to Class V by
using the Bore seal trim.
To help reduce aerodynamic noise in gas service, Whisper Trim III and WhisperFlo cages are available. Cavitrol III cages
are available to eliminate the effects of liquid cavitation damage and DST, Dirty Service Trim, is available for cavitating
liquid with particulates.

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Figure 2. Cutaway Detail of Fisher WhisperFlo Trim, Valve Body Typical
W6825-1
Fisher WhisperFlo trim represents state of the art solutions for applications that demand ultimate aerodynamic noise
attenuation.
Control valves with WhisperFlo cages (figure 2) provide additional aerodynamic noise attenuation in very demanding
vapor or gas applications with high-pressure drops. A WhisperFlo cage with an appropriately sized valve body is
designed to reduce the noise level up to -40 dBA. For special applications, -50 dBA attenuation can be achieved.
Specifications
Typical specifications for these valves are shown in tables 1 and 2. Some of the specifications for a given valve
assembly as it comes from the factory appear on the actuator nameplate if the valve is part of a complete control valve
assembly.
Installation
WARNING
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.
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.

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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 valve 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.
WARNING
If you are hoisting the valve, use nylon slings to protect the surfaces.
Carefully position the slings to prevent damage to the actuator tubing and any accessories. Also, take care to prevent
people from being injured in case the hoist or rigging slips unexpectedly. Refer to table 6 for valve assembly weights. It is
important to use adequately sized hoists and chains or slings to handle the valve.
1. Before installing the valve, inspect the valve and associated equipment for any damage and any foreign material.
2. Make certain that the valve body interior is clean, that pipelines are free of foreign material, and the valve is
oriented so that pipeline flow is in the same direction as the arrow on the side of the valve.
CAUTION
For long service life and more effective operation, the process liquid must be clean. If the valve being installed has a
Whisper Trim, WhisperFlo, or Cavitrol Trim cage with small internal flow passages, impurities or entrained solids in the
process liquid may cause irreparable erosion damage to the seating surfaces and may plug cage holes and passages,
causing cavitation damage. During valve installation or the plant cleaning cycle, install a strainer upstream from the valve
to help free pipelines of foreign material.
3. The control valve assembly may be installed in any orientation unless limited by seismic criteria. However, the
normal method is with the actuator vertical above the valve. Other positions may result in uneven valve plug and
cage wear and in improper operation. Support the actuator if it is not installed in the vertical position. For more
information, consult your Emerson Process Management sales office.
4. Use accepted piping and welding practices when installing the valve in the line. You can leave internal elastomeric
parts in place when welding. For flanged valves, use a suitable gasket between the valve and pipeline flanges.
CAUTION
Depending on valve body materials used, post weld heat treating might be required. If so, damage to internal elastomeric
and plastic parts, as well as internal metal parts is possible. Shrunk-fit pieces and threaded connections might also loosen. If
post weld heat treating is to be performed, all trim parts should be removed. Contact your Emerson Process Management
sales office for additional information.
5. With a leak-off bonnet construction, remove the 1/4 NPT pipe plugs (key 14, figure 5) from the bonnet to hook up
the leak-off piping.

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6. If continuous operation of the plant is required during inspection or maintenance of the valve, install a three-valve
bypass around the control valve assembly.
7. If the actuator and valve are shipped separately, refer to the actuator mounting procedure in the appropriate
actuator instruction manual.
WARNING
Personal injury could result from packing leakage. Valve packing was tightened before shipment; however some
readjustment will be required to meet specific service conditions.
If the valve has ENVIRO-SEALtlive-loaded packing or HIGH-SEAL ULF live-loaded packing installed, this initial
re-adjustment will probably not be required. See the Fisher instruction manuals titled ENVIRO-SEAL Packing System for
Sliding-Stem Valves (D101642X012) or HIGH-SEAL ULF Live-Loaded Packing System (D101453X012) (as appropriate)
for packing instructions.
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,
packing maintenance, trim maintenance, lapping seating surfaces, and valve plug maintenance. All maintenance
operations may 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 valve. Drain the process media from both sides of the valve.
DVent the power actuator loading pressure and relieve any actuator spring precompression.
DUselock-outprocedurestobesurethattheabovemeasures 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.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator, release all pressure from the actuator, and use lock-out procedures to prevent injury while you work on
the equipment.

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Figure 3. Lubricator and Lubricator/Isolating Valve
LUBRICATOR
LUBRICATOR/ISOLATING VALVE
10A9421-A
AJ5428-D
A0832-2
31
31
Note
Whenever a gasket seal is disturbed by removing or shifting gasketed parts, a new gasket should be installed upon reassembly.
This is necessary to ensure a good gasket seal because the used gasket might not seal properly.
Note
If the valve has ENVIRO-SEAL live-loaded packing or HIGH-SEAL ULF live-loaded packing installed, see the Fisher instruction
manuals titled ENVIRO-SEAL Packing System for Sliding-Stem Valves (D101642X012) or HIGH-SEAL ULF Live-Loaded Packing
System (D101453X012) (as appropriate) for packing instructions.
Packing Lubrication
If a lubricator or lubricator/isolating valve (figure 3) 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 5). 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 4 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 5) until the shoulder
is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing Packing section.

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Figure 4. Typical Packing
B2398
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
PTFE V-RING
DOUBLE ARRANGEMENTS
PTFE/COMPOSITION
ARRANGEMENT
NOTE:
PACKING SET (KEY 6) (2 REQUIRED FOR DOUBLE ARRANGEMENTS)
PTFE V-RING SINGLE ARRANGEMENTS
FOR S31600 OR S17400 SST
METAL PACKING BOX PARTS
FORALLOTHERMETALPACKING
BOXPARTMATERIALS
UPPER WIPER
(KEY 12)
UPPER WIPER
(KEY 12)
UPPER WIPER
(KEY 12)
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
WASHER
(KEY 10)
SPRING
(KEY 8)
PACKING BOX
RING (KEY 11) PACKING BOX
RING (KEY 11)
PACKING BOX
RING (KEY 11)
PACKING BOX
RING (KEY 11)
FEMALE
ADAPTOR FEMALE
ADAPTOR
FEMALE
ADAPTOR (KEY 32)
MALE
ADAPTOR MALE
ADAPTOR
MALE
ADAPTOR (KEY 31)
LOWER WIPER
LOWER
WIPER
LOWER
WIPER
PACKING RING
PACKING RING (KEY 7)
PACKING RING (KEY 7)
SPACER (KEY 8)
LANTERN RING
(KEY 8)
LANTERN RING
(KEY 8)
ASSEMBLY 1
(POSITIVE
PRESSURES)
ASSEMBLY 2
(VACUUM)
ASSEMBLY 3
(POSITIVE
PRESSURES &
VACUUM)
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
valve stem is critical for making a good packing seal. If the leakage comes from the outside diameter of the packing, it

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is possible that the leakage is caused by nicks or scratches around the packing box wall. If performing any of the
following procedures, inspect the valve stem and packing box wall for nicks and scratches.
Figure 4. Typical Packing (Continued)
A6060
NOTE:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS:
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
GRAPHITE RIBBON/FILAMENT PACKING
SINGLE ARRANGEMENT DOUBLE ARRANGEMENT
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
31.8 and 50.8 mm
(1-1/4 and 2 INCH) STEM
PACKING
FOLLOWER
(KEY 13)
PACKING
FOLLOWER
(KEY 13)
GRAPHITE RIBBON
PACKING RING (KEY 7)
GRAPHITE RIBBON
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
LANTERN RING
(KEY 8)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
PACKING BOX
RING (KEY 11)
Replacing Packing
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator, release all pressure from the actuator, and use lock-out procedures to prevent injury while you work on
the equipment.
2. Remove any leak-off piping from the bonnet. Disconnect the stem connector, and then remove the actuator from
the valve by unscrewing the hex nuts (key 26, figure 5).
3. Loosen the packing flange nuts (key 5, figure 5) so that the packing is not tight on the valve stem. Remove any
travel indicator parts and stem locknuts from the valve stem threads.
CAUTION
Avoid damage to the seating surfaces caused by the valve plug and stem assembly dropping from the bonnet after being
lifted part way out.
When lifting the bonnet (key 1, figure 5), either be sure that the valve plug and stem assembly remains in the valve and on
the seat or, temporarily install a valve stem locknut on the valve stem. This locknut will prevent the valve plug and stem
assembly from dropping out of the bonnet.
WARNING
To avoid personal injury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by
following the instructions in the next step. 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.
If the cage sticks to the bonnet, proceed carefully with bonnet removal.

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Figure 5. Typical Globe Valve Bonnet
CU4317
Note
The following step also provides additional assurance that the valve body fluid pressure has been relieved.
4. Hex nuts (key 16, figures 7 or 8) attach the bonnet to the valve body. Loosen these nuts or cap screws
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, remove the nuts completely and carefully lift the bonnet (key 1, figure 5).
5. Set the bonnet on a protective surface to prevent damage to the bonnet gasket surface.
6. Whenever the bonnet has been removed, replace the bonnet gasket and the cage gasket (keys 10 and 11, figures 7
and 8). Remove the bonnet gasket.
7. Lift the valve plug and stem assembly out of the valve body and set it on a protective surface. If the valve plug is to
be reused, protect the valve plug seating surface to prevent scratches.
Table 3. Packing Flange Nut Torque for Packing Without a Spring
VALVE STEM
DIAMETER PRESSURE
RATING
GRAPHITE-TYPE PACKING PTFE-TYPE PACKING
Minimum Torque Maximum Torque Minimum Torque Maximum Torque
mm Inch NSmLbfSft NSmLbfSft NSmLbfSft NSmLbfSft
31.8 1-1/4 CL150 & 300
CL600
33
45
24.3
33.2
49
67
36.1
49.4
16
21
11.8
15.5
25
33
18.4
24.3
50.8 2CL300 43 32 65 48 20 15 31 23
CL600 61 45 91 67 27 20 41 30

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Table 4. Body-to-Bonnet Bolt Torque
BOLT SIZE, INCH THREADS PER INCH BOLTING TORQUE(1)
NSmLbfSft
1-1/4 8990 730
1-1/2 81750 1290
1. For B7, B7M, B16, and 660 bolting materials. For other materials, contact your Emerson Process Management sales office for torque values.
8. Install screws or bolts into the tapped holes in the top of the cage assembly (key 3), and carefully lift it out of the
valve body. Remove the cage gasket (key 11).
9. If further trim maintenance is required, refer to the Trim Maintenance section.
CAUTION
To prevent damage to the valve cavity, packing box wall, and packing surfaces, observe the instructions in the next three
steps.
10. Cover the opening in the valve body to protect the gasket surface and prevent foreign material from getting into
the valve cavity.
11. Remove the packing flange nuts, packing flange, upper wiper, and packing follower (keys 5, 3, 12, and 13, figure
5). 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 the metal packing parts.
12. Inspect the valve stem threads and packing box surfaces for any sharp edges that might cut the packing. Scratches
or burrs could cause packing box leakage or damage to the new packing. If the surface condition cannot be
improved by light sanding or honing with a tool similar to an automotive brake-cylinder hone, replace the damaged
parts.
13. Remove the covering protecting the valve cavity, and install a new cage gasket (key 11, figure 7 and 8), making
sure the gasket seating surfaces are clean and smooth.
14. Re-install the trim parts by following the Trim Replacement section. Install a new bonnet gasket (key 10, figure 7
and 8).
Note
Proper performance of the tightening procedures in step 15 compresses the bonnet and cage gaskets (keys 10 and 11, figure 7
and 8) enough to seal the body-to-bonnet joint.
The bolting procedures in step 15 include--but are not limited to--ensuring that bolting threads are clean and evenly tightening
the hex nuts onto the studs in a crisscross pattern. Because of the boltup characteristics of the gaskets, tightening one nut may
loosen an adjacent nut. Repeat the crisscross tightening pattern several times until each nut is tight and the body-to-bonnet seal is
made.
15. Lubricate the stud bolts (key 15, figure 7 and 8) with anti-seize lubricant, slide the bonnet over the stem and onto
the bolts, and secure with the stud bolt nuts (key 16, figure 7 and 8), using accepted bolting procedures during
tightening so that the body-to-bonnet joint will withstand test pressures and application service conditions. Refer
to table 4 for bolting torque guidelines.
16. Install new packing and the metal packing box parts according to the appropriate arrangement in figure 4. Place a
smooth-edged pipe over the valve stem, and gently tap each soft packing part into the packing box one piece at a
time, being sure that air is not trapped between adjacent soft parts.
17. Slide the packing follower, upper wiper, and packing flange (keys 13, 12, and 3, figure 5) into position. Lubricate
the packing flange studs (key 4, figure 5) and the faces of the packing flange nuts (key 5, figure 5). Replace the
packing flange nuts.

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18. For spring-loaded PTFE V-ring packing, tighten the packing flange nuts until the shoulder on the packing follower
(key 13, figure 5) contacts the bonnet.
For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 3. Then,
loosen the packing flange nuts and retighten them to the recommended minimum torque shown in table 3.
For other packing types, tighten the packing flange nuts alternately in small, equal increments until one of the nuts
reaches the minimum recommended torque shown in table 3. Then, tighten the remaining flange nut until the
packing flange (key 3, figure 5) is at a 90-degree angle to the valve stem.
19. Mount the actuator on the valve assembly, and reconnect the actuator and valve stem according to the procedure
in the appropriate actuator instruction manual. Check for leakage around the packing follower when the valve is
being put into service. Retighten the packing flange nuts as required.
Trim Maintenance
Trim Removal
Except where indicated, key numbers in this section are shown in figure 8 for ET valves and in figure 7 for ED valves.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the
process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power
actuator, release all pressure from the actuator, and use lock-out procedures to prevent injury while you work on
the equipment.
2. Remove the actuator and the bonnet according to steps 2 through 5 of the Replacing Packing Section.
CAUTION
Use care to avoid damaging gasket surfaces.
The surface finish of the valve stem (key 7) is critical for making a good packing seal. The inside surface of the cage or cage
assembly (key 3) is critical for smooth operation of the valve plug and for making a seal with the seal ring (key 28). The
seating surfaces of the valve plug (key 2) and seat ring (key 9) are critical for proper shutoff. Assume all these parts are in
good condition, and protect them accordingly unless inspection reveals otherwise.
3. Packing parts can be removed if desired. Replace these parts as described in the Packing Replacement section.
4. Lift the valve plug and stem assembly out of the valve body and set it on a protective surface. If the valve plug is to
be reused, protect the valve plug seating surface to prevent scratches.
5. Install screws or bolts into the tapped holes in the top of the cage assembly (key 3), and carefully lift it out of the
valve body. Remove the gaskets (keys 10 and 11).
6. Proceed as appropriate:
ForETvalves(figure7), the valve has a seat ring seal ring (key 6). Inspect this seal ring, and remove it if replacement is
necessary. The seat ring is screwed into the cage and secured with two tack welds, one on each side of the cage.
Remove the tack welds by grinding or filing them off.
ForETvalveswithHTS1option(figure9), the valve has a seat ring seal ring (figure 6, key 6). Inspect this seal ring, and
remove it if replacement is necessary. To remove the seal ring, the retaining ring (key 227) must be removed first.
After the retaining ring is removed, the seal ring (key 6), backup ring (key 226), and anti-extrusion rings (key 225) can
be removed. The seat ring is screwed into the cage and secured with two tack welds, one on each side of the cage.
Remove the tack welds by grinding or filing them off.
DThere are two 3/8-inch UNC tapped holes in the bottom of the seat ring. Screw cap screws into these holes. Use a
bar to pry against the cap screws and turn the seat ring out of the cage.

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ForEDvalves(figure8), unscrew the seat ring cap screws (key 49). Install screws or bolts into the tapped holes in the
top of the seat ring (key 9) and carefully lift it out of the valve body. Remove the gasket (key 13).
7. Inspect parts for wear or damage that would prevent proper operation of the valve. Replace or repair trim parts
according to the following Lapping Seating Surfaces or Valve Plug Maintenance procedures as appropriate.
Lapping Seating Surfaces
A certain amount of leakage should be expected with metal-to-metal seating in any valve body. If the leakage
becomes excessive, however, the condition of the seating surfaces of the valve plug and seat ring can be improved by
lapping. (Deep nicks should be machined out rather than ground out.) Use a good quality lapping compound of a
mixture of 280 to 600-grit. Apply the compound to the bottom of the valve plug.
Assemble the valve to the extent that the cage or cage assembly is in place and the bonnet is bolted to the valve body.
A simple handle can be made from a piece of strap iron locked to the valve plug stem with nuts. Rotate the handle
alternately in each direction to lap the seats. After lapping, remove the bonnet, and clean the seat surfaces.
Completely assemble the valve as described in the Trim Replacement section, and test the valve for shutoff. Repeat
the lapping procedure if leakage is still excessive.
Valve Plug Maintenance
Except where indicated, key numbers in this section are shown in figure 8 for ET valves and in figure 7 for ED valves.
CAUTION
For valves with a PTFE seal ring (figure 6), if replacing the valve plug seal ring (key 28), be careful not to scratch the surfaces
of the ring groove in the valve plug or any of the surfaces of the replacement ring, or the replacement ring may not seal
properly.
1. Remove the valve plug (key 2) according to the Disassembly section.
2. For ET constructions, carefully pry or cut the seal ring (key 28, figure 6) from its groove in the plug.
Install the replacement spring-loaded seal ring with the open side facing the top or bottom of the valve plug,
depending on flow direction. The open side of the seal ringshouldfaceup(towardtheactuator)inflow-up
installations and down in flow-down installations.
To install the seal ring, first lubricate it with general-purpose, lithium-base lubricant. Then gently stretch the seal ring
and work it over the top edge of the valve plug. Give the PTFE material in the seal ring time to cold flow during the
stretching procedure. Avoid jerking sharply on the ring. Stretching the seal ring over the valve plug might make it
seem loose when it is in the groove, but it will shrink to its original size after you have installed the plug into the cage.
3. ForETvalveswithHTS1option(figure6), carefully pry the retaining ring from the groove in the plug. Then remove
the seal ring (key 28), backup ring (key 29), and anti-extrusion ring (key 219). Install the seal ring and other parts
according to figure 6.
Install the seat ring seal ring (key 6) so that its open side faces the valve stem for Whisper Trim III, WhisperFlo, and
flow-up standard cages. Reverse the seal ring for Cavitrol III trim and flow-down standard cages. Lubricate the seal ring
(key 6), backup ring (key 226), anti-extrusion ring (key 225), and retaining ring (key 227) with a general-purpose,
lithium-base lubricant, and slide the seal ring, backup ring, and anti-extrusion ring over the seat ring according to
figure 6. Start the retaining ring in the groove on one side of the seat ring, and gently work it over the seat ring.

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
14
Figure 6. Seal Ring and Piston Ring Details
B2425
SEAL RING FOR
ET VALVES
PISTON RINGS FOR
ED VALVES
FLOW UP
PEEK ANTI-EXTRUSION RINGS
FLOW DOWN
21B2120-A
A6137 / IL
2
27
29
28
2
27
29
28
PLUG SEAL RING FOR ET VALVES WITH HTS1 OPTIONS
CAGE
(KEY 3)
CAGE
(KEY 3)
VALVE
PLUG
(KEY 2)
VALVE
PLUG
(KEY 2)
SEAL
RING
(KEY 28)
PISTON
RINGS
(KEY 28)
NOTE:
SEAL RING OPENING MUST FACE SEAT RING FOR FLOW DOWN
APPLICATIONS AND MUST FACE ACTUATOR FOR FLOW UP APPLICATIONS.
99
6
6
226 226
225
225
227 227
219
219
SEAT RING SEAL RING FOR ET VALVES WITH HTS1 OPTIONS
FLOW UP FLOW DOWN
PEEK ANTI-EXTRUSION RINGS
4. For ED constructions, each of the piston rings (key 28, figure 6) is in two pieces; remove the pieces.
Each new graphite piston ring is furnished as a complete ring, and each must be broken into two approximately equal
portions. Do this by placing the ring on edge on a smooth, hard surface and striking the ring squarely with a hammer.
Be sure to match the broken ends when installing the ring sections in the valve plug grooves.

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
15
CAUTION
Never reuse an old stem (key 7) 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 it to fail in service. However, a used valve plug may be reused with a new
stem.
5. To replace the valve stem (key 7), drill out the pin (key 8) and unscrew the stem from the valve plug.
6. Screw the new stem tightly into the valve plug. Drill through the stem, using a 1/4-inch diameter drill for the 31.8
mm (1-1/4 inch) stem diameter used in this valve. Use the hole in the valve plug as a guide. Remove any chips or
burrs, and drive in a new pin to lock the assembly.
Trim Replacement
Except where indicated, key numbers are shown in figure 7 and 8.
1. Proceed as appropriate:
For ET valves:
Insert cap screws in the two 3/8-inch tapped holes in the bottom of the seat ring (key 9). Use a bar to pry against the
cap screws and turn the seat ring (key 9) into the cage (key 3).
For all sizes, tack weld the seat ring to the cage using minimal heat. Two welds, 6 mm (1/4-inch) long and 180 degrees
apart, are required. Install the seat ring seal ring (key 6) so that its open side faces the valve stem for Cavitrol III trim
and flow-down standard cages. Reverse the seal ring for Whisper Trim III, WhisperFlo, and flow-up standard cages.
Lubricate the seal ring with a general-purpose, lithium-base lubricant, and place it over the bottom end of the seat
ring. Start the ring in the groove on one side of the seat ring, and gently work it over the seat ring.
ForETvalveswithHST1option:
For all sizes, tack weld the seat ring to the cage using minimal heat. Two welds, 6 mm (1/4-inch) long and 180 degrees
apart, are required. For ET valves with HTS1 option, install the seat ring seal ring (key 6) so that its open side faces the
valve stem for Cavitrol III trim and flow-down standard cages. Reverse the seal ring for Whisper Trim III, WhisperFlo,
and flow-up standard cages. Lubricate the seal ring (key 6), backup ring (key 226), anti-extrusion ring (key 225), and
retaining ring (key 227) with a general-purpose, lithium-base lubricant, and slide the seal ring, backup ring, and
anti-extrusion ring over the seat ring according to figure 6. Start the retaining ring in the groove on one side of the seat
ring, and gently work it over the seat ring.
ForEDvalves(figure8), install the seat ring gasket (key 13).
Temporarily install screws or bolts into the tapped holes in the seat ring (key 9), making sure the seating surface is
facing up. Lower the seat ring into the valve body. Remove the temporary screws or bolts.
Secure the seat ring (key 9) with the cap screws (key 49). Tighten the cap screws in a criss-cross pattern to a torque of
39 NSm(29lbfSft) for NPS 12, 14, and 16 valves.
2. Install a cage gasket (key 11) into the valve. Temporarily install screws or bolts into the tapped holes in the top of
the cage assembly (key 3) to help while installing this piece into the valve. Any rotational orientation of the cage or
assembly with respect to the valve is acceptable.
For ET valves, use care to avoid damaging the seat ring seal ring and cage seating surfaces while handling the heavy
parts. To help insert the cage or assembly into the valve, lubricate the outside diameter of the seat ring seal ring with
lithium grease.

Instruction Manual
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Large ET and ED Valves
December 2011
16
3. Slide the valve plug (key 2) and stem assembly into the cage.
For valves with a seal ring, make sure the valve plug seal ring (key 28) is evenly engaged in the entrance chamfer at the
top of the cage or cage assembly to avoid damaging the ring.
For valves with piston rings, make sure the rings are fully engaged into the piston ring groove and flush with the
outside diameter of the plug.
4. Install the bonnet gasket (key 10).
Figure 7. Typical Fisher ET Valve

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
17
Figure 8. Typical Fisher ED Valve
B2411
APPLY LUB

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
18
Figure 9. Typical Fisher ET Valve with HTS1 Option

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
19
Figure 10. Fisher EUD and EWD 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
CAUTION
If the packing is to be reused and was not removed from the bonnet, use care when installing the bonnet to avoid
damaging the packing with the valve stem threads.
5. Mount the bonnet on the valve, and complete assembly according to steps 15 through 19 of the Replacing Packing
section, omitting steps 16 and 17 if new packing is not being installed and being sure to observe the note before
step 15.
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 10).

Instruction Manual
D103553X012
Large ET and ED Valves
December 2011
20
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 10).
DThe open interior of the Bore Seal plug seal must face down in a valve with flow-down construction (figure 10).
3. Place the Bore Seal plug seal over the top of the valve plug. The retainer will help guide the Bore Seal down onto the
plug (figure 10). Do not force the Bore Seal over the plug. For flow down constructions, skip to step 5.
4. An installation tool (see table 5) must be inserted into the Bore Seal prior to using the retainer to guide it down the
plug.
Figure 11. Bore Seal Installation Tool
GE22109-A
A
B
C
D
E
F
G
H
Table 5. Bore Seal Installation Tool Dimensions
VALVE
PORT SIZE,
INCH
Dimensions, Inches (See Figure 11) Tool Part
Number
A B C D E F G H
10.00 10.12 9.7 9.80-9.82 10.02-10.00 0.10 0.10 0.32 R.06 GE17914X012
11.00 (1) n/a
1. For sizes,contact your Emerson Process Management sales office.
5. 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. For flow down constructions, skip to
step 7.
6. Remove the retainer and then the installation tool. Place the Bore Seal retainer back onto the plug and tighten the
retainer using an appropriate tool such as a strap wrench.
7. Using an appropriate tool such as a center punch, stake the threads on top of the plug in one place (figure 12) to
secure the Bore Seal retainer.