Emerson Fisher Large ET Manual de usuario

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

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

Figure 3. Lubricator and Lubricator/Isolating Valve

LUBRICATOR

LUBRICATOR/ISOLATING VALVE

10A9421-A

AJ5428-D

A0832-2

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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)

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

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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.

Instruction Manual

D103553X012

Large ET and ED Valves

December 2011

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

24.3

33.2

36.1

49.4

11.8

15.5

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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