Emerson Fisher EHD Manuale utente

www.Fisher.com

Fisher™EHD, EHS, and EHT Valves

NPS 1-1/2x1 through NPS 8x6

Contents

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

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

Description 2.................................

Specifications 3...............................

Educational Services 3.........................

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

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

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

Packing Maintenance 7.........................

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

Trim Removal 12..............................

Valve Plug Maintenance 14.....................

Lapping Seats 15..............................

Trim Replacement 16..........................

Retrofit: Installing C‐seal Trim 21................

Replacement of Installed C‐seal Trim 24...........

Trim Removal (C‐seal Constructions) 24.......

Lapping Metal Seats (C‐seal Constructions) 26..

Remachining Metal Seats

(C‐seal Constructions) 26.................

Trim Replacement (C‐seal Constructions) 26...

Parts Ordering 28...............................

Parts Kits 28...................................

Parts List 29...................................

Figure 1. Fisher EH Valve with 657 Actuator

W3387

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for the Fisher EHD, EHS, and EHT

control valves in NPS 1-1/2 x 1 through NPS 8x6. Refer to separate manuals for instructions covering the actuator,

positioner, ENVIRO‐SEAL™packing, HIGH‐SEAL packing, and accessories.

Do not install, operate, or maintain EHD, EHS, or EHT valves 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 sales office or Local Business Partner before

proceeding.

Unless otherwise noted, all NACE references are to NACE MR0175‐2002.

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Table 1. Specifications

End Connection Styles

Buttwelding: All available ASME B16.25 schedules

that are compatible with ASME B16.34

pressure/temperature ratings

Flanged: CL2500 Jring‐type joint (RTJ) or

Jraised‐face (RF) flanges according to ASME B16.5

Socket Welding: Consistent with ASME B16.11

Maximum Inlet Pressure(1)

Buttwelding: Consistent with CL2500

pressure‐temperature ratings per ASME B16.34

Flanged: Consistent with CL2500

pressure‐temperature ratings per ASME B16.34

Socket Welding: Consistent with CL2500

pressure‐temperature ratings per ASME B16.34

Shutoff Classifications

See table 2

C‐seal trim: High‐temperature, Class V.

See table 3

TSO (Tight Shutoff) trim: See tables 4 and 5

Flow Characteristic

Standard Cage: JEqual percentage, Jmodified

equal percentage(2), Jor linear

Cavitrol™III or Whisper Trim™III Cage: Linear

Flow Direction

EHD or EHT: Flow down, except with either a Whisper

Trim III cage or a valve plug with diverter cone, both

of which are flow up

EHS: Flow up, except flow down with Cavitrol III cage

Approximate Weights (Valve Body and Bonnet

Assemblies)

See table 6

Additional Specifications

For specifications such as materials, valve plug

travels, and port, yoke boss, and stem diameters, see

the Parts List section

1. The pressure or temperature limits in this manual and any applicable standard limitations should not be exceeded.

2. Modified equal percentage characteristic is equal‐percentage for the first 90% of travel, then quick‐opening for additional capacity.

Table 2. Shutoff Classifications per ANSI/FCI 70‐2 and IEC 60534‐4

Valve Valve Size,

NPS ANSI/FCI Leakage Class

EHD

3x2 II

3, 4x3,

4, 6x4

II—Standard

III—Optional(1)

6, 8x6 III—Standard

IV—Optional(1)

EHS w/Cavitrol III, or

EHT w/Cavitrol III All V(1)

EHS, EHT,

EHS w/Micro‐Form or

EHS w/Micro Flute

All

IV—Standard

V—Optional(1)

EHT w/ PEEK Anti‐Extrusion

Rings 3 to 6 V to 600_F (316_C)

1. O‐ring seat ring construction recommended for this shutoff classification; for temperatures below 232_C (450_F) only.

Description

The EHD, EHS, and EHT high‐pressure globe valves (figure 1) have metal seats, cage guiding, and push‐down‐to‐close

valve plug action. The EHD and EHT valves use balanced valve plugs.

The EHS valve uses an unbalanced valve plug. To provide a seal between the cage and a balanced valve plug, the EHD

valve plug uses piston rings; the EHT valve plug uses a pressure‐assisted seal ring. A Whisper Trim cage can be used

with an EHD, EHS, or EHT valve plug. A Cavitrol III cage can be used with an EHS or EHT valve plug.

C‐seal trim is available for EHD valves, CL2500, in sizes 4, 6, 6x4, and 8x6.

With C‐seal trim, a balanced valve can achieve high‐temperature, Class V shutoff. Because the C‐seal plug seal is

formed from metal (N07718 nickel alloy) rather than an elastomer, a valve equipped with the C‐seal trim can be

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

applied in processes with a fluid temperature of up to 593_C (1100_F), provided other material limits are not

exceeded. Contact your Emerson sales office or Local Business Partner for information.

Specifications

Specifications for the EHD, EHS, and EHT valves are shown in table 1.

Educational Services

For information on available courses for the Fisher EH valve, as well as a variety of other products, contact:

Emerson Automation Solutions

Educational Services - Registration

Phone: 1-641-754-3771 or 1-800-338-8158

E-mail: [email protected]

emerson.com/fishervalvetraining

Table 3. Additional Shutoff Classification per ANSI/FCI 70‐2 and IEC 60534‐4

Valve (Class) Valve Size, NPS Port Diameter, Inches Cage Style ANSI/FCI Leakage

Class

EHD

(CL2500)

6x4 2.875

Equal Percentage, Modified Equal Percentage,

Linear (std. cage),

Linear (Whisper III, A1, B3, C3)

V (for port

diameters from 2.875

through 7‐inch with

optional C‐seal trim)

Linear (Cavitrol III, 2‐stage)

8x6 4.375

Equal Percentage, Modified Equal Percentage,

Linear (std. cage),

Linear (Whisper III, A1, B3, C3, D3)

8x6 4.375 Linear (Cavitrol III, 2‐ and 3‐stage)

Table 4. TSO (Tight Shutoff) Leakage Class per ANSI/FCI 70‐2 and IEC 60534‐4

Leakage Class Maximum Leakage Test Medium Test Pressure ANSI/FCI Leakage Class

TSO (Tight Shutoff)

Valves with TSO trim are factory tested to

a more stringent Emerson Automation

Solutions test requirement of no leakage

at time of shipment.

Water Service ΔP(1) V

1. Specify service ΔP when ordering.

Table 5. TSO Shutoff Availability

VALVE CONSTRUCTION LEAKAGE CLASS

Standard Optional

EHS, EHT Cavitrol III trim. Replaceable, protected soft seat TSO ‐ ‐ ‐

Table 6. Approximate Weights (Valve Body and Bonnet Assemblies)

VALVE

SIZE,

NPS

CL2500

Kilograms Pounds

Flg

SWE

BWE

Flg

SWE

BWE

1-1/2 x 1 ‐ ‐ ‐ 46 ‐ ‐ ‐ 101

2x1 78 47 173 104

3x2 161 94 355 207

3 223 163 492 359

4x3 265 162 585 357

4 338 243 745 536

6x4 526 257 1160 567

6 785 544 1731 1199

8x6 955 558 2106 1231

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Installation

WARNING

Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal

injury.

To avoid personal injury or property damage resulting from the sudden release of pressure, do not install the valve

assembly where service conditions could exceed the limits given in this manual or on the appropriate nameplates. Use

pressure‐relieving devices as required by government or accepted industry codes and good engineering practices.

Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this

instruction manual.

CAUTION

Responsibility for the safety of process media and compatibility of valve materials with process media rests solely with the

purchaser and end‐user. The valve configuration and construction materials meet particular pressure, temperature,

pressure drop, and controlled fluid conditions specified in the customer's order. Because some body/trim material

combinations are limited in their pressure drop and temperature range capabilities (especially due to differences in

thermal expansion rates), do not apply any other conditions to the valve without first contacting your Emerson sales office

or Local Business Partner.

CAUTION

If hoisting the valve, use a nylon sling to protect the painted surfaces. Carefully position the sling to prevent damage to the

tubing or any accessories. Use adequately sized hoists and chains or slings to handle the valve and take precautions to

prevent personnel from being injured in case the hoist or rigging slips unexpectedly. Refer to table 6 for valve assembly

weights.

WARNING

Personal injury could result from packing leakage. Valve packing was tightened prior to shipment; however some

readjustment will be required to meet specific service conditions. Check with your process or safety engineer for any

additional measures that must be taken to protect against process media.

1. Before installing the valve, inspect it to ensure that the valve body cavity is free of foreign material.

2. Clean out all pipelines to remove scale, welding slag, and other foreign materials before installing the valve.

Note

If the valve being installed has small internal flow passages, such as with Whisper Trim III or Cavitrol III cages, consideration should

be given to installing an upstream strainer to prevent the lodging of particles in these passages. This is especially important if the

pipeline cannot be thoroughly cleaned or if the flowing medium is not clean.

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

3. The control valve must be installed with the actuator vertical above the valve body for proper operation. Flow

through the valve must be in the direction indicated by the flow arrow (key 15, figure 18, 19, or 20) on the valve

body.

4. Use accepted piping and welding practices when installing the valve in the line. For welding end valve bodies,

completely disassemble the valve removing all trim parts before welding the valve body in the line. For flanged

valve bodies, use suitable gaskets between the valve body flanges and pipeline flanges.

Figure 2. Lubricator and Lubricator/Isolating Valve

LUBRICATOR

LUBRICATOR/ISOLATING VALVE

10A9421‐A

AJ5428‐D

A0832‐2

CAUTION

Depending on valve body materials used, post‐weld heat treating might be needed. Post‐weld heat treatment can damage

internal elastomeric, plastic, and metal parts. Shrunk‐fit pieces and threaded connections might loosen.

If post‐weld heat treating is needed, remove all trim parts to avoid any damage to internal elastomeric, plastic, and metal

parts. Contact your Emerson sales office or Local Business Partner for additional information.

5. Install a three‐valve bypass around the valve if continuous operation is required during maintenance.

6. If the actuator and valve body are shipped separately, refer to the actuator mounting procedure in the appropriate

actuator instruction manual.

7. If the valve was shipped without packing installed in the packing box, install the packing before putting the valve

into service. Refer to instructions given in the Packing Maintenance procedure.

Valves with ENVIRO‐SEAL live‐loaded packing or HIGH‐SEAL Heavy‐Duty live‐loaded packing will not require this initial

re‐adjustment. See the Fisher instruction manuals titled ENVIRO‐SEAL Packing System for Sliding‐Stem Valves

(D101642X012) or HIGH‐SEAL Live‐Loaded Packing System (D101453X012) (as appropriate) for packing instructions.

If you wish to convert your present packing arrangement to ENVIRO‐SEAL packing, refer to the retrofit kits listed in the

parts kit sub‐section near the end of this manual.

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

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, adding packing rings, replacing packing, trim removal, valve plug maintenance, lapping seats,

and trim replacement. All maintenance operations can be performed with the valve in the line.

WARNING

Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:

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.

D Check with your process or safety engineer for any additional measures that must be taken to protect against process

media.

Table 7. Recommended Torque for Packing Flange Nuts

STEM

DIAMETER

VALVE

BODY

RATING(1)

TORQUE

NSm LbfSFt

mm Inches Min Max Min Max

12.7 1/2 CL1500 15 22 11 16

CL2500 18 24 13 18

19.1 3/4 CL1500 34 50 25 37

CL2500 41 61 30 45

25.4 1 CL1500 52 77 38 57

CL2500 61 91 45 67

31.8 1‐1/4 CL1500 68 102 50 75

CL2500 81 122 60 90

1. Includes intermediate class ratings.

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.

Note

If the valve has ENVIRO‐SEAL live‐loaded packing installed (figure 3), see the Fisher instruction manual entitled ENVIRO‐SEAL

Packing System for Sliding‐Stem Valves (D101642X012) for packing instructions.

If the valve has HIGH‐SEAL heavy‐duty live‐loaded packing installed, see Fisher instruction manual entitled HIGH‐SEAL Live‐Loaded

Packing System (D101453X012) for packing instructions.

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

WARNING

Personal injury could result from packing leakage. Valve packing was tightened prior to shipment; however some

readjustment will be required to meet specific service conditions. Check with your process or safety engineer for any

additional measures that must be taken to protect against process media.

Packing Lubrication

CAUTION

Do not lubricate graphite packing. Graphite packing is self-lubricated. Additional lubrication may result in slip-stick

movement of the valve.

WARNING

To avoid personal injury or property damage resulting from fire or explosion, do not lubricate packing used in oxygen

service or in processes with temperatures over 260_C (500_F).

A lubricator or lubricator/isolating valve (figure 2) is recommended for PTFE‐composition packing. The lubricator or

lubricator/isolating valve is installed in place of the pipe plug (key 14, figure 16). It is recommended that a good quality

silicon‐base lubricant be used. To operate the lubricator, simply turn the cap screw clockwise to force 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

If there is undesirable packing leakage in spring‐loaded PTFE V‐ring packing (figure 4), tighten the packing flange nuts

(key 5, figure 16) until the shoulder on the packing follower (key 13, figure 16) contacts the bonnet (key 1, figure 16).

If leakage continues, replace the packing by following the numbered steps presented in the Replacing Packing

procedure.

CAUTION

When tightening packing flange nuts, do not exceed the maximum recommended torque in table 7 or excessive friction

may result, resulting in keeping the valve from stroking fully and not attaining proper seat load.

If there is undesirable packing leakage with other than spring‐loaded PTFE V‐ring packing, first try to limit the leakage

and establish a stem seal by tightening the packing flange nuts (key 5, figure 16) to at least the minimum

recommended torque in table 7. However, do not exceed the maximum recommended torque in table 7 or excessive

friction may result. If leakage continues, replace the packing by following the numbered steps presented in the

Replacing Packing procedure.

If the packing is relatively new and tight on the valve plug stem, and if tightening the packing flange nuts does not stop

the leakage, it is possible that the stem is worn or nicked so that a seal cannot be made. The surface finish of a 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. While replacing the packing according to

the Replacing Packing procedure, inspect the valve plug stem and packing box wall for nicks or scratches.

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Replacing Packing

Key numbers referred to in this procedure are shown in figure 16 unless otherwise indicated.

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.

Remove the cap screws in the stem connector, and separate the two halves of the stem connector. Then exhaust all

actuator pressure, if any was applied, and disconnect the actuator supply and any leakoff piping.

2. Remove either the yoke locknut (key 15) or the hex nuts (key 26), and remove the actuator from the bonnet (key 1).

3. Loosen the packing flange nuts (key 5) so that the packing is not tight on the valve plug stem (key 4, figure 18, 19,

or 20). Remove any travel indicator disk and stem locknuts from the valve plug stem threads.

Table 8. Torque for Body‐to‐Bonnet Bolting Using Anti‐Seize Lubricant(1)

VALVE

SIZE,

NPS

VALVE

BODY

RATING

TORQUE

NSm LbfSFt

B7, B16, BD and 660 Studs B8 and B8M Studs B7, B16, BD and 660 Studs B8 and B8M Studs

1, 1-1/2 x 1, 2x1 CL1500 163 122 120 90

CL2500 258 195 190 140

2, 3x2 CL1500 258 195 190 140

CL2500 380 285 280 210

3, 4x3 CL1500 556 420 410 310

CL2500 786 597 580 440

4, 6x4 CL1500 786 597 580 440

CL2500 1058 800 780 590

6, 8x6 CL1500 1383 1044 1020 770

CL2500 2807 2102 2070 1550

1. For other materials, contact your Emerson sales office or Local Business Partner for torques.

CAUTION

When lifting the bonnet (key 1), be sure that the valve plug and stem assembly (keys 3 and 4, figure 18, 19, or 20) remains

on the seat ring (key 6, figure 18, 19, or 20). This avoids damage to the seating surfaces as a result of the assembly dropping

from the bonnet after being lifted part way out. The parts are also easier to handle separately.

Use care to avoid damaging gasket sealing surfaces.

The EHD piston rings (key 8, figure 18) are brittle and in two halves. Avoid damaging the piston rings by dropping or rough

handling.

WARNING

If the cage adheres to the bonnet as the bonnet is lifted, secure the cage to the bonnet so that it will not cause personal

injury or equipment damage should it fall unexpectedly.

4. Unscrew the hex nuts (key 14, figure 18, 19, or 20) and carefully lift the bonnet off the valve stem. If present,

remove the Belleville washers (key 33, figure 17) and flat washers (key 29, figure 18, 19, 17, or 20). If the valve plug

and stem assembly starts to lift with the bonnet, use a brass or lead hammer on the end of the stem and tap it back

down. Set the bonnet on a cardboard or wooden surface to prevent damage to the bonnet gasket surface.

5. Remove the valve plug (key 3, figure 18, 19, or 20), the cage (key 2, figure 18, 19, or 20), and the top and bottom

cage gaskets (key 11, figure 18, 19, or 20).

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Figure 3. Live‐Loaded Packing

39B4153‐A

A6297‐1

Typical HIGH‐SEAL ULF Packing System Typical ENVIRO‐SEAL Packing System

with PTFE Packing

Typical ENVIRO‐SEAL Packing System

with Graphite ULF Packing

Typical ENVIRO‐SEAL Packing System

with Duplex Packing

200

212

201

215

216

207

209

211

217

207

214

213

A6722

39B4612/A

Instruction Manual

D100394X012

EH (1-1/2x1 through 8x6)

July 2017

Figure 4. Packing Arrangements

UPPER WIPER (KEY 12)

PTFE V‐RING

SINGLE PACKING

GRAPHITE RIBBON AND FILAMENT

SINGLE PACKING

12A8160‐A

PACKING FOLLOWER

(KEY 13)

FEMALE ADAPTOR

(KEY 32)

V‐RING (KEY 7)

MALE ADAPTOR

(KEY 31)

WASHER (KEY 10)

SPRING (KEY 8)

PACKING BOX RING

(KEY 11)

LOWER WIPER

(KEY 30)

PACKING FOLLOWER

(KEY 13)

PACKING BOX RING

(KEY 11)

GRAPHITE RIBBON

PACKING RING (KEY 7)

GRAPHITE FILAMENT

PACKING RING (KEY 7)

LANTERN RING

(KEY 8)

KEY 6

14A3412‐C

PACKING FOLLOWER

(KEY 13)

PACKING BOX RING

(KEY 11)

GRAPHITE RIBBON

PACKING RING (KEY 7)

GRAPHITE FILAMENT

PACKING RING (KEY 7)

LANTERN RING

(KEY 8)

UPPER WIPER (KEY 12)

PACKING FOLLOWER

(KEY 13)

V‐RING (KEY 7)

MALE ADAPTOR

(KEY 31)

LANTERN RING

(KEY 8)

PACKING BOX RING

(KEY 11)

LOWER WIPER

(KEY 30)

KEY 6

FEMALE ADAPTOR

(KEY 32)

UPPER WIPER (KEY 12)

PACKING FOLLOWER

(KEY 13)

LANTERN RING

(KEY 8)

PACKING BOX RING

(KEY 11)

PACKING RING

(KEY 7)

PTFE V‐RING

DOUBLE PACKING

GRAPHITE RIBBON AND FILAMENT

DOUBLE PACKING

PTFE/COMPOSITION

DOUBLE PACKING

12A7839‐A

Sht 1

14A3414‐C 12A8163‐A

NOTES:

0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS.

USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.

HAS THE APPEARANCE OF A WOVEN OR BRAIDED RING.

INCLUDED IN KEY 6 PACKING SET.

C0637‐1

CAUTION

All residual gasket material must be removed from the cage gasket surfaces. If the gasket surfaces are scored or damaged

during this process, smooth them by hand sanding with 360 grit paper using long, sweeping strokes. Failure to remove all

residual gasket material and/or burrs from the gasket surfaces will result in leakage.

6. Clean all gasket surfaces with a good quality degreaser. Remove all residual tin or silver from all gasket surfaces.

7. Cover the opening in the valve body to protect the gasket surface and to prevent foreign material from getting into

the valve body cavity.

8. Remove the packing flange nuts (key 5), packing flange (key 3), upper wiper (key 12), and packing follower (key 13,

figures 4 and 16). Carefully push out all the remaining packing parts from the valve side of the bonnet using a

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