Fisher EUT-2, EUD, EUT, EWT-2, EWD Instruction Manual

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Page 1

Instruction Manual

D102010X012 August 2010

Fisherr EU and EW Valves NPS 12 through 24 x 20

Contents

Introduction 1...............................

Scope of Manual 1..........................

Description 3...............................

Specifications 4............................

Installation 4................................

Maintenance 6.............................

Packing Lubrication 7.......................

Packing Maintenance 8......................

Replacing Packing 8.......................

Trim Maintenance 11........................

Trim Removal 11..........................

Lapping Seating Surfaces 11................

Valve Plug Maintenance 12.................

Trim Replacement 12......................

Retrofit: Installing Bore Seal Trim 17...........

Replacement of Installed Bore Seal Trim 19....

Trim Removal (Bore Seal Constructions) 19...

Lapping Metal Seats

(Bore Seal Constructions) 20.............

Remachining Metal Seats

(Bore Seal Constructions) 20.............

Trim Replacement

(Bore Seal Constructions) 20.............

Parts Ordering 21............................

Parts List 22................................

EU and EW Series Valves

Introduction

Scope of Manual

This instruction manual includes installation and maintenance information for NPS 12 through 24 x 20 CL150 through 600 Fisher EUD, EUT, EUT-2, EWD, EWT, and EWT-2 valves, and the NPS 16 and 20 x 16 CL900 EUD, EUT2, EWD, and EWT-2 valves. (Size designations such as NPS 20 x 16 are end connection size x nominal trim size.)

Refer to separate manuals for instructions covering the actuator and accessories.

www.Fisher.com

W9156-1

Figure 1. NPS 24 x 20 Fisher EWT Valve with

Piston Actuator and FIELDVUEt DVC6020

Digital Valve Controller

Do not install, operate, or maintain an EUD, EUT, EUT-2, EWD, EWT, or EWT-2 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.

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Instruction Manual

EU and EW Series Valves

Table 1. Specifications

Valve Sizes

EUT, EUT-2, and EUD: NPS J 12, J 16, and

J 20 EWT, EWT-2, and EWD: NPS J 16x12, J 20x16, J 24x16, and J 24x20 valves (size

designations are end connection size x nominal trim size)

End Connection Styles

Flanged: CL150, 300, 600, and 900

(1)

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

Flanged: Consistent with CL150, 300, 600, and

(1)

900

pressure/temperature ratings per

(2)

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

EUT, EUT-2, EWT, and EWT-2 with Metal Seats

Standard (for all trims except 2-Stage Cavitrolt Trim): Class IV Standard (for 2-Stage Cavitrol Trim): Class V Optional (for all trims except 2-Stage Cavitrol Trim): Class V

EUT, EUT-2, EWT, and EWT-2 with Soft Metal Seats: Class V

1. CL900 end connections are available only for NPS 16 and 20 x 16 EUD, EUT-2, EWD, or EWT-2 valves.

2. Do not exceed the pressure or temperature limits in this manual, on the equipment nameplate, and any applicable code limitations.

Shutoff Classifications per ANSI/FCI 70-2 and IEC 60534-4 (continued)

EUD and EWD with Metal Seats

Standard: Class III Optional: Class IV

Flow Characteristics

Standard Cages: J Linear or J equal

percentage

WhisperFlot, Whisper Trimt III, and Cavitrol III Cages: Linear

Flow Direction

Standard and Cavitrol III Cages: Down WhisperFlo and Whisper Trim III Cages: Up

Port Diameters

NPS 12 Trim: 279.4 mm (11.00 inches) NPS 16 Trim: J 374.7 mm (14.75 inches),

J 412.8 mm (16.25 inches) for EUT, EUT-2, EWT, and EWT-2 valves with Whisper Trim III cage

NPS 20 Trim: J 463.6 mm (18.25 inches) or J 502 mm (19.75 inches) for EUT-2 and EWT-2

valves with Whisper Trim III cage

Valve Plug Travel

102 through 432 mm (4 to 17 inches). Contact your Emerson Process Management sales office for further details if needed

Yoke Boss and Stem Diameters

J 127 mm (5-inch) or J 127 mm (5H-inch) diameter yoke boss, each with 31.8 mm (1-1/4 inch) diameter valve stem

Approximate Weights

See table 6

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Instruction Manual

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Table 2. WhisperFlo Trim Specifications

Trim Material and Selection

J 316 Stainless Steel w/ hardfacing J 410 Stainless Steel, hardened J Others per application

Temperature Capability

J EUT and EWT: 73 to 316_C (100 to 600_F) J EUT-2 and EWT-2: 73 to 232_C (100 to 450_F) J EUD and EWD: 29 to 538_C (20 to 1000_F) J Others per application

Maximum Pressure Drops

As shown in this bulletin. Also see Bulletin

80.3:010 WhisperFlo Aerodynamic Attenuation Trims

WhisperFlo Aerodynamic Trim Pressure Ratings

(1,2)

Up to 1500 psi drop

EU and EW Series Valves

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: Flow up--through the seat ring and out through the cage orifices

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

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

Noise Attenuation

Approximately 40 dBA maximum depending on the nP/P

ratio per IEC 60534-8-3 calculation

procedure

EUD and EWD valves have a seat ring bolted into the valve body with cap screws. Seating is

All valve types covered in this manual (EUD, EUT, EUT-2, EWD, EWT, and EWT-2 valves) can be used

metal-to-metal. A typical EUD or EWD valve is shown in figure 8.

for either throttling or on-off control of a wide variety of liquids and gasses. They are single-port, globe-style valves with cage guiding, balanced valve plugs, and a push-down-to-close action. EUT, EWT, and EWT-2 valves have a spring-loaded PTFE seal between the plug and cage; the EUD and EWD valves have two graphite piston rings between the plug and cage. See figure 6 for seal details.

EUT-2 and EWT-2 valves have a seat ring threaded into the cage. A spring-loaded PTFE seal is used to seal between the seat ring and the valve body. Standard seating is metal-to-metal, but optional soft metal seats are also available. A typical EUT-2 or EWT-2 valve is shown in figure 7.

EUT and EWT valves have a seat ring bolted into the valve body with cap screws. These valves have metal-to-metal seating and use PEEK anti-extrusion rings in the plug seal arrangement to increase the upper temperature limit of the seal to 316_C (600_F). A typical EUT valve is shown in figure 9.

Cavitrol III, Whisper Trim III, and WhisperFlo trim cages are available in these valves. Cavitrol trim helps eliminate cavitation damage in liquid service in a properly sized valve and Whisper Trim III and WhisperFlo trim cages help attenuate aerodynamic noise in gas service.

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Instruction Manual

EU and EW Series Valves

W6825-1/IL

August 2010

Figure 2. Cutaway Detail of Fisher WhisperFlo Trim, Valve Body Typical

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.

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

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Instruction Manual

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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

EU and EW Series Valves

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.

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-SEALt live-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.

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Instruction Manual

EU and EW Series Valves

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:

D Do not remove the actuator from

the valve while the valve is still pressurized.

D Always wear protective gloves,

clothing, and eyewear when performing any maintenance operations to avoid personal injury.

D Disconnect any operating lines

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

D Use bypass valves or completely

shut off the process to isolate the valve from process pressure. Relieve process pressure on both sides of the valve. Drain the process media from both sides of the valve.

D Vent the power actuator loading

pressure and relieve any actuator spring precompression.

D Use lock-out procedures to be

sure that the above measures stay in effect while you work on the equipment.

D The valve packing box may

contain process fluids that are pressurized, even when the valve has

been removed from the pipeline.

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

August 2010

LUBRICATOR

10A9421-A AJ5428-D A0832-2/IL

Figure 3. Lubricator and Lubricator/Isolating Valve

LUBRICATOR/ISOLATING VALVE

D Check 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.

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.

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EU and EW Series Valves

B2398/IL

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

Figure 4. Typical Packing

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.

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EU and EW Series Valves

A6060/IL

Figure 4. Typical Packing (Continued)

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.

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.

August 2010

any of the following procedures, inspect the valve stem and packing box wall for nicks and scratches.

Replacing Packing

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

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 is possible that the leakage is caused by nicks or scratches around the packing box wall. If performing

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

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EU and EW Series Valves

CU4317 / IL

Figure 5. Typical Globe Valve Bonnet

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.

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.

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EU and EW Series Valves

Table 3. Packing Flange Nut Torque for Packing Without a Spring

VALV E

STEM

DIAMETER

mm Inch

31.8 1-1/4

Table 4. Body-to-Bonnet Bolt Torque

VALVE SIZE,

NPS

12, 16 x 12 16 16 20 x 16, 24 x 16 20 x 16 20, 24 x 20

1. For B7, B7M, B16, and 660 bolting materials. For other materials, contact your Emerson Process Management sales office for torque values.

PRESSURE

RATING

CL150 & 300

CL600 CL900

PRESSURE

RATING

CL150 - 600 CL150 - 600

CL900

CL150 - 600

CL900

CL150 - 600

Minimum

NSm LbfSft NSm LbfSft NSm LbfSft NSm LbfSft

33 45 56

BOLTING TORQUE

NSm LbfSft

1750 2800 1250 2800 1250 4240

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.

GRAPHITE-TYPE

PACKING

Torque

24.3

33.2

41.3

(1)

1290 2070

920

2070

920

3130

August 2010

PTFE-TYPE

PACKING

Maximum

Torque

49 67 83

36.1

49.4

61.2

Minimum

Torque

16 21 27

11.8

15.5

19.9

Maximum

Torque

25 33 41

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.

18.4

24.3

30.2

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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

EU and EW Series Valves

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:

For EUT-2 or EWT-2 valves (figure 7), 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.

Trim Removal

Except where indicated, key numbers in this section are shown in figure 8 for EUT-2 and EWT-2 valves and in figure 7 for EUD and EWD valves.

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

D For all sizes except the NPS 12 and 16 x 12,

there are slots cut in the seat ring. Insert a bar through the slots and turn the seat ring out of the cage.

D For the NPS 12 and 16 x 12, there 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.

For EUD, EWD, EUT, and EWT valves (figure 8), 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

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EU and EW Series Valves

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 EUT-2 and EWT-2 valves and in figure 7 for EUD and EWD 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 seal-ring constructions, carefully pry or cut the seal ring (key 28, figure 6) from its groove in the plug.

August 2010

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. For piston-ring 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.

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.

4. To replace the valve stem (key 7), drill out the pin (key 8) and unscrew the stem from the valve plug.

5. 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.

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 ring should face up (toward the actuator) in flow-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

1. Proceed as appropriate:

For EUT-2 or EWT-2 valves:

For all sizes except NPS 12 and 16 x 12, turn the seat ring (key 9) into the cage (key 3) with a bar inserted through the seat ring slots.

For NPS 12 and 16 x 12, 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).

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EUT-2 AND EWT-2 VALVES

SEAL RING FOR

EU and EW Series Valves

PISTON RINGS FOR

EUD AND EWD VALVES

B2425 / IL

Figure 6. Seal Ring and Piston Ring Details

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

FLOW UP

21B2120-A A6137 / IL

PEEK ANTI-EXTRUSION RINGS

SEAL RING FOR

EUT AND EWT VALVES

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.

FLOW DOWN

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Instruction Manual

EU and EW Series Valves

August 2010

For EUD and EWD valves (figure 8) and EUT and EWT valves (figure 9), 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

Figure 7. Typical Fisher EUT-2 or EWT-2 Valve

(key 49). Tighten the cap screws in a criss-cross pattern to a torque of 39 NSm (29 lbfSft) for NPS 12 and 16 x 12 valves and to 92 NSm (68 lbfSft) for NPS 16 through 24 x 20 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.

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Instruction Manual

August 2010

EU and EW Series Valves

B2411 / IL

For EUT-2 and EWT-2 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.

3. Slide the valve plug (key 2) and stem assembly into the cage.

Figure 8. Typical Fisher EUD Valve

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).

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Instruction Manual

EU and EW Series Valves

August 2010

Figure 9. Typical Fisher EUT or EWT Valve with HTS1 Option

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Instruction Manual

August 2010

RETAINER

PLUG

FLOW DOWN

Figure 10. Fisher EUD and EWD with Bore Seal Trim

PISTON RING

CAGE

SEATING AREA

BORE SEAL

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

EU and EW Series Valves

RETAINER

PISTON RING

CAGE

SEATING AREA

PLUG

BORE SEAL

FLOW UP

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).

2. Orient the Bore Seal plug seal for correct sealing action based on the process fluid flow direction through the valve.

D The open interior of the Bore Seal plug seal must face up in a valve with flow-up construction (figure 10).

D The 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.

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Instruction Manual

EU and EW Series Valves

August 2010

GE22109-A

Figure 11. Bore Seal Installation Tool

Table 5. Bore Seal Installation Tool Dimensions

VALV E

PORT

SIZE,

INCH

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

14.00

14.75 14.84 14.42414.416 14.51614.536 14.73614.716 0.1 0.1 0.32 R.05 GE34073X012

17.00

18.25

1. For sizes,contact your Emerson Process Management sales office.

A B C D E F G H

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.

Dimensions, Inches (See Figure 11)

(1)

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.

8. Install the new plug/retainer assembly with Bore Seal on the new stem following the appropriate instructions in the Trim Replacement section of this manual.

9. Install piston rings by following instructions in the Trim Replacement section of this manual.

Tool Part

Number

n/a

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Instruction Manual

August 2010

10. 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.

11. 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.

12. Replace all gaskets according to appropriate instructions in the Trim Replacement section of this manual.

13. 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 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 a predetermined permanent 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

EU and EW Series Valves

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 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.

2. Remove the plug/retainer assembly (with Bore 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 12). The staked thread secures the retainer. 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 from the groove in the Bore Seal retainer.

5. After removing the piston ring, locate the 1/4-inch diameter hole in the groove.

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Instruction Manual

EU and EW Series Valves

DEFORM THREAD TO STAKE Bore Seal RETAINER

PISTON RING

RETAINER

Bore Seal METAL PLUG SEAL

A6779 / IL

Figure 12. Stake the Threads of the Bore Seal Retainer

FLOW DOWN

VALV E PLUG

PLUG

RETAINER

UPPER SEATING SURFACE

CAGE

PLUG

August 2010

PISTON RING

CAGE

SEATING AREA

BORE SEAL

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 13).

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 cage, and inspect the sealing surface where the Bore Seal plug seal makes contact with the plug (figure 13).

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,

SEAT RING

LOWER SEATING SURFACE

NOTE:

UPPER SEATING SURFACE IS THE AREA OF CONTACT BETWEEN THE BORE SEAL METAL PLUG SEAL AND THE CAGE.

A6780 / IL

Figure 13. Lower (Valve Plug to Seat Ring) and Upper

(Bore Seal to Cage) Seating Surfaces

figure 13) 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 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.

Trim Replacement (Bore Seal Constructions)

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Instruction Manual

August 2010

2. Orient the Bore Seal plug seal for correct sealing action based on the process fluid flow direction through the valve.

D The open interior of the Bore Seal plug seal must face up in a valve with flow-up construction (figure 10).

D The 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. 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.

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.

8. Replace the piston ring(s) following instructions in the Trim Replacement section of this manual.

9. 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

EU and EW Series Valves

force will adequately drive the valve plug to the seat ring, thus giving the Bore Seal a predetermined permanent 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.

Parts Ordering

Each body-bonnet assembly is assigned a serial number, which can be found on the valve. 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 serial number when contacting your Emerson Process Management sales office for technical assistance. When ordering replacement parts, refer to the serial number and to the key number and part name from the following list. Specify the desired material, if known. Part numbers are shown for packing box parts. Specify the part number if you are ordering packing parts.

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.

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Instruction Manual

EU and EW Series Valves

Table 6. Approximate Weights

END

CONNECTION

Size, NPS Type

16 x 12

CL900

20 x 16

CL600

20 x 16

CL900

24 x 16

24 x 20

1. RF—raised face; RTJ—ring-type joint; BW—buttwelding.

(1)

RTJ

BW 1220 2700

RTJ

BW 1450 3200

RTJ

BW 2270 5000

RTJ

BW 3130 6900

RTJ

BW 4810 10,600

RTJ

BW 4630 10,200

RTJ

BW 7120 15,700

APPROXIMATE

WEIGHT

kg lb

1410 3100

1720 3800

2540 5600

2680 5900

3540 7800

3720 8200

5220 11,500

7710 17,000

August 2010

Key Description Part Number

6* Seat Ring Seal (EUT-2 & EWT-2 Valves Only) 7* Valve Plug Stem 8* Pin 9* Seat Ring 10* Bonnet Gasket 11* Cage Gasket 13* Seat Ring Gasket (EUD, EWD, EUT, and EWT valves only) 15 Stud 16 Hex Nut 17 Drain Plug, optional 28* Seal Ring (EUT-2 and EWT-2 valves only) 28* Piston Ring (2 req’d) (EUD and EWD valves only) 49* Cap Screw (EUD, EWD, EUT, and EWT valves only)

219* PEEK Anti-extrusion ring (EUT and EWT valves only)

Bonnet

1 Valve Bonnet 3 Packing Box Flange 4 Packing Flange Stud (2 req’d) 5 Packing Flange Nut (2 req’d)

PTFE V-Ring Packing

6* Packing Set, PTFE (1 req’d) for single

packing; 2 req’d for double packing) 1R290801012

8 Spring, stainless steel (single packing

only) 1D387437012

8 Lantern Ring, stainless steel (double

packing only) 0W087135072

10 Special Washer, stainless steel (single

packing only) 1H995936042

PTFE/Composition Packing

7* Packing Ring, PTFE/composition (8 req’d) 1D7520X0012 8 Lantern Ring, stainless steel 0W087135072

Parts List

Note

Part numbers are shown for recommended spares only. For part numbers not shown, contact your Emerson Process Management sales office.

Key Description Part Number

Valve Body

1 Valve Body 2* Valve Plug 3* Cage

Graphite Ribbon/Filament Packing

7* Packing Ring, Graphite Ribbon (2 req’d for

single packing; 3 req’d for double packing) 1V5666X0022

7* Packing Ring, Graphite Filament (3 req’d

for single packing; 3 req’d for double packing) 1D7520X0162

8 Lantern Ring, stainless steel (2 req’d

for single packing; 1 req’d for double

packing) 0W087135072 11 Packing Box Ring 12* Upper Wiper, Felt (PTFE packings only) 1J873006332 13 Packing Follower 14 Pipe Plug 25 Cap Screw (8 req’d) 26 Hex Nut (8 req’d)

*Recommended spare parts

Page 23

Instruction Manual

August 2010

EU and EW Series Valves

BONNET

CAGE RETAINER

CAP SCREW

EWD, EUD, EWT

Figure 14. Typical Fisher WhisperFlo Trims

EWT-2, EUT2

WhisperFlo CAGE

SEAT RING

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Instruction Manual

EU and EW Series Valves

August 2010

Fisher, FIELDVUE, Cavitrol, WhisperFlo, Whisper Trim, and ENVIRO-SEAL are marks owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Emerson Process Management

Marshalltown, Iowa 50158 USA Sorocaba, 18087 Brazil Chatham, Kent ME4 4QZ UK Dubai, United Arab Emirates Singapore 128461 Singapore

www.Fisher.com