Emerson Fisher easy-e ES Instruction Manual

Instruction Manual

D100397X012

Fisherr ES and EAS easy-et Valves CL125 through CL600

ES Valve

October 2014

Contents

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

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

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

Specifications 2...............................

Installation 2..................................

Maintenance 4.................................

Packing Lubrication 5..........................

Packing Maintenance 6.........................

Replacing Packing 6........................

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

Disassembly 11............................

Lapping Metal Seats 13.....................

Valve Plug Maintenance 13..................

Assembly 13..............................

ENVIRO-SEALt Bellows Seal and Bonnet 14.......

Replacing a Plain or Extension Bonnet with an

ENVIRO-SEAL Bellows Seal (Stem/Bellows

Assembly) and Bonnet 14.................

Replacement of an Installed ENVIRO-SEAL

Bellows Seal (Stem/Bellows Assembly) 16...

Purging the ENVIRO-SEAL Bellows

Seal Bonnet 17..........................

Parts Ordering 17...............................

Parts Kits 17...................................

Parts List 19...................................

Figure 1. Fisher ES Valve with 657 Actuator

W2174-3

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for NPS 1/2 through 8 Fisher ES valves,andNPS1through6EASvalves,throughCL600ratings. Refer to separate manuals for instructions covering the actuator and accessories.

Do not install, operate, or maintain an ES 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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ES Valve

October 2014

Table 1. Specifications

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End Connection Styles

Cast Iron Valves Flanged: CL125 flat-face or CL250 raised-face flanges per ASME B16.1 Steel and Stainless Steel Valves Flanged: CL150, 300, and 600 raised-face or ring-type joint flanges per ASME B16.5

Shutoff Classifications

See table 2

Flow Characteristics

Standard Cages: Linear, quick opening, or equal percentage

Whisper Trimt and WhisperFlot Cages: Linear Screwed or Socket Welding: All available ASME B16.11 schedules that are consistent with CL600 per ASME B16.34 Buttwelding: Consistent with ASME B16.25

Maximum Inlet Pressure

(1)

Cast Iron Valves Flanged: Consistent with CL125B or 250B pressure-temperature ratings per ASME B16.1 Steel and Stainless Steel Valves Flanged: Consistent with CL150, 300, and 600

(2)

pressure-temperature ratings per ASME B16.34 Screwed or Welding: Consistent with CL600 pressure-temperature ratings per ASME B16.34

1. The pressure/temperaturelimits in thismanual and any applicable standard or code limitationfor the valve should not be exceeded.

2. Certain bonnet bolting material selections may requirea CL600 easy-e valve assembly to be derated. Contact your Emerson Process Managementsales office.

Flow Directions

Standard Cages: Normally up

Whisper Trim and WhisperFlo Cages: Always up

Approximate Weights

VALVE SIZE, NPS

1/2 and 3/4 1 and 1-1/4

1-1/2

2-1/2

3 4 6 8

kg Pounds

11 14 20 39 45 54

77 459 408

WEIGHT

25 30 45

67 100 125 170 350 900

Description

These single-port valves have cage guiding, quick-change trim, and unbalanced push-down-to-close valve plug action. Valve configurations are as follows:

ES–Globe style valve (figure 1) with metal-to-metal seating as standard for all general applications over a wide range of pressure drops and temperatures, and metal-to-PTFE seating is optional for more stringent shutoff requirements.

EAS–Angle valve version of ES, used to facilitate piping or in applications where a self draining valve body is required.

Specifications

Typical specifications for these valves are shown in table 1.

Installation

WARNING

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

Personal injury or equipment damage caused by sudden release of pressure may result if the valve assembly is installed where service conditions could exceed the limits given in table 1 or on the appropriate nameplates. To avoid such injury or damage, provide a relief valve for over-pressure protection as required by government or accepted industry codes and good engineering practices.

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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.

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October 2014

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

Seating Shutoff Class

Metal

PTFE VI

IV (standard)

CAUTION

When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop, and controlled fluid conditions. Since some body/trim material combinations are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve without first contacting your Emerson Process Management sales office.

Before installing the valve, inspect the valve and pipelines for any damage and any foreign material which may cause product damage.

1. Before installing the valve, inspect the valve and associated equipment for any damage and any foreign material.

2. Make certain the valve body interior is clean, that pipelines are free of foreign material, and that the valve is orientedsothatpipelineflowisinthesamedirectionasthearrowonthesideofthevalve.

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 improper operation. With some valves, the actuator may also need to be supported when it is not vertical. For more information, consult your Emerson Process Management sales office.

4. Use accepted piping and welding practices when installing the valve in the line. Internal elastomeric parts may stay in place during the welding procedure. For flanged valves, use a suitable gasket between the valve and pipeline flanges.

CAUTION

Depending on valve body materials used, post weld heat treating may 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 may also loosen. In general, 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 pipe plugs (keys 14 and 16, figure 8) to hook up the leak-off piping. If continuous operation is required during inspection or maintenance, install a three-valve bypass around the control valve assembly.

6. 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, the packing might require some readjustment to meet specific service conditions.

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October 2014

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D100397X012

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 or Heavy-Duty Live-Loaded Packing System (as appropriate) for packing instructions. If you wish to convert your present packing arrangement to ENVIRO-SEAL packing, refer to the retrofit kits listed inthePartsKitssub-sectionneartheend of this manual.

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, and ENVIRO-SEAL bellows seal replacement. All maintenance operations may be performed with the valve in the line.

WARNING

Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting disassembly:

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 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 compression.

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.

CAUTION

Follow instructions carefully to avoid damaging the product surfaces, which could result in damage to the product.

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 since the used gasket may not seal properly.

Note

If the valve has ENVIRO-SEAL or HIGH-SEAL live-loaded packing installed, refer to instruction manuals ENVIRO-SEAL Packing System for Sliding-Stem Valves, D101642X012, or HIGH-SEAL Live-Loaded Packing System, D101453X012, for packing

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D100397X012

ES Valve

October 2014

instructions. Figure 9 shows a typical HIGH-SEAL Packing system. Figures 10, 11, and 12 show typical ENVIRO-SEAL packing systems.

If the valve has an ENVIRO-SEAL bellows seal bonnet installed, referto this manual. See the ENVIRO-SEAL Bellows Seal and Bonnet section for information on the bellows seal bonnet.

Figure 2. Optional Lubricator and Lubricator/Isolating Valve

10A9421-A AJ5428-D A0832-2

LUBRICATOR LUBRICATOR/ISOLATING VALVE

Table 3. Body-to-Bonnet Bolt Torque Guidelines

VALVE SIZE, NPS BOLT TORQUES

ES EAS

1-1/4 or less 1 129 95 64 47

1-1/2, 1-1/2 x 1, 2, or 2 x 1 2or2x1 96 71 45 33

2-1/2 or 2-1/2 x 1-1/2 3or3x1-1/2 129 95 64 47

3, 3 x 2, or 3 x 2-1/2 4or4x2 169 125 88 65

4, 4 x 2-1/2, or 4 x 3 6or6x2-1/2 271 200 156 115

6 --- 549 405 366 270

8 --- 746 550 529 390

1. Determined from laboratory tests.

2. SA193-B8M annealed.

3. SA193-B8M strain hardened.

4. For other materials, contactyour Emerson Process Management sales office for torques.

Packing Lubrication

Note

ENVIRO-SEAL or HIGH-SEAL packing does not require lubrication.

(1, 4)

SA193-B7, SA193-B8M

NSm LbfSft NSm LbfSft

(3)

SA193-B8M

(2)

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).

If a lubricator or lubricator/isolating valve (figure 2) is provided for PTFE/composition or other packings that require lubrication, it will be installed in place of the pipe plug (key 14, figure 8). Use a good quality silicon-base lubricant. Packingusedinoxygenserviceorinprocesses with temperatures over 260_C(500_F) should not be lubricated. To

ES Valve

October 2014

operate the lubricator, simply 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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Packing Maintenance

Key numbers refer to figure 3 for PTFE V-ring packing and to figure 5 for PTFE/composition packing, unless otherwise indicated.

For spring-loaded single PTFE V-ring packing, the spring (key 8, figure 3) maintains a sealing force on the packing. If leakage is noted around the packing follower (key 13, figure 3), 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 8) until the shoulder is against the bonnet. If leakage cannot be stopped in this manner, proceed to the replacing packing procedure.

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 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.

Replacing Packing

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

1. Isolatethecontrolvalvefromthelinepressure, and release pressure from the valve.

2. Disconnect the operating lines from the actuator and any leak-off piping from the bonnet. Disconnect the stem connector, then remove the actuator from the valve by unscrewing the yoke locknut (key 15, figure 8) or the hex nuts (key 26, figure 8).

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 helps to provide additional assurance that the valve body fluid pressure has been relieved.

3. Hex nuts (key 5, figure 8) attach the bonnet to the valve. 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.

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Figure 3. PTFE V-Ring Packing Arrangements for Plain and Extension Bonnets

ES Valve

October 2014

UPPER WIPER (KEY 12)

PACKING FOLLOWER (KEY 13)

WASHER (KEY 10)

SPRING (KEY 8)

PACKING BOX RING (KEY 11)

12A7837- A

FOR S31600 OR S17400

METAL PACKING BOX PARTS

NOTE:

PART OF PACKING SET (KEY 6) (SEE TABLE IN PARTS LIST).

B2427

FEMALE ADAPTOR

PAC KI NG RI N G

MALE ADAPTOR

LOWER WIPER

SINGLE ARRANGEMENTS

FEMALE ADAPTOR

PACKING RING

MALE ADAPTOR

LOWER WIPER

FORALLOTHERMETALPACKING

BOX PART MATERIALS

UPPER WIPER (KEY 12)

PACKING FOLLOWER (KEY 13)

SPACER (KEY 8)

PACKING BOX RING (KEY 11)

UPPER WIPER (KEY 12)

PACKING FOLLOWER (KEY 13)

MALE ADAPTOR (KEY 31)

PACKING RING (KEY 7)

FEMALE ADAPTOR (KEY 32)

LANTERN RING (KEY 8)

12A8187-D 12A7814-D 12A7839-A

ASSEMBLY 1

(POSITIVE

PRESSURES)

ASSEMBLY 2

(VACUUM)

ASSEMBLY 3

(POSITIVE

PRESSURES

& VAC UUM)

ASSEMBLY 1

(POSITIVE

PRESSURES)

ASSEMBLY 2

(VACUUM)

ASSEMBLY 3

(POSITIVE

PRESSURES

& VACUU M)

ASSEMBLY 1

(POSITIVE

PRESSURES)

9.5 mm (3/8 INCH) STEM 12.7 mm (1/2 INCH) STEM

B1428-3

DOUBLE ARRANGEMENTS

ASSEMBLY 2

(VACUUM)

ASSEMBLY 3

PRESSURES

19.1, 25.4, or 31.8 mm

(3/4, 1, OR 1-1/4 INCH) STEM

(POSITIVE

& V ACUUM)

PACKING BOX RING (KEY 11)

LOWER WIPER (KEY 30)

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October 2014

Figure 4. PTFE Packing Arrangements for Use in ENVIRO-SEAL Bellows Seal Bonnets

UPPER WIPER

(KEY 12)

BUSHING (KEY 13)

PACKING SET: (KEY 6)

FEMALE ADAPTOR

PACKING RING

MALE ADAPTOR

SPACER

THRUST

(KEY 39)

SPRING

(KEY 8)

THRUST

12B4182-A SHT 1

(KEY 39)

9.5 mm

(3/8 INCH)

STEM

FOR S31600 (316 SST)

PACKING BOX PARTS

BUSHING

(KEY 13)

RING

12B4185-A SHT 1

12.7 mm

(1/2 INCH)

STEM

SINGLE ARRANGEMENTS

BUSHING

(KEY 13)

SPACER

(KEY 8)

12B4182-A SHT 2

9.5 mm

(3/8 INCH)

STEM

MATERIALS EXCEPT S31600

UPPER WIPER

(KEY 12)

BUSHING (KEY 13)

PACKING SET: (KEY 6)

FEMALE ADAPTOR PACKING RING MALE ADAPTOR

(KEY 8)

SPACER

(KEY 8)

12B4185-A SHT 2

12.7 mm

(1/2 INCH)

FOR ALL PACKING BOX

STEM

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SPACER

(KEY 8)

THRUST

12B4183-A 18A0906-D 18A5338-A

9.5 mm

(3/8 INCH)

STEM

RING

(KEY 39)

12.7 mm

(1/2 INCH)

STEM FOR

NPS 2 VALVES

12.7 mm

(1/2 INCH)

STEM FOR

NPS 3 AND 4

VALVES

A5863-1

DOUBLE ARRANGEMENTS

4. Loosen the packing flange nuts (key 5, figure 8) so that the packing is not tight on the valve stem. Remove any travel indicator parts from the valve stem threads.

CAUTION

Avoid damage to the seating surface caused by the valve plug and stem assembly dropping from the bonnet after being lifted part way out. When lifting the bonnet, 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.

If the cage starts to lift with the bonnet, tap it with a plastic mallet, or other soft material, to be sure it stays in the valve.

5. Completely remove the cap screws (not shown) or hex nuts (key 16; figure 13, 14, or 15) that bolt the bonnet and valve together and carefully lift the bonnet off.

6. Remove the locknut and separate the valve plug and stem from the bonnet. Set the parts on a protective surface to prevent damage to gasket or seating surfaces.

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October 2014

Figure 5. Detail of PTFE/Composition Packing Arrangements for Plain and Extension Bonnets

UPPER WIPER (KEY 12)

PACKING FOLLOWER (KEY 13)

PACKING RING (KEY 7)

LANTERN RING (KEY 8)

PACKING BOX RING (KEY 11)

12A8188-A 12A7815-A 12A8173-A A2619-2

9.5 mm

(3/8 INCH)

STEM

12.7 mm

(1/2 INCH)

STEM

19.1, 25.4, OR

31.8 mm

(3/4, 1, OR

1-1/4 INCH)

STEM

TYPICAL (DOUBLE) ARRANGEMENTS

Figure 6. Double Graphite Ribbon/Filament Arrange ments for use in ENVIRO-SEAL Bellows Seal Bonnets

BUSHING

12.7 mm

(KEY 13)

GRAPHITE FILAMENT PACKING RING (KEY 7)

GRAPHITE RIBBON PACKING RING (KEY 7)

SPACER (KEY 8)

12B4181-A

9.5 mm

(3/8 INCH)

STEM

NOTE:

0.102 mm (0.004INCH) THICK SACRIFICIAL ZINC WASHERS; USE ONLY ONE BELOW EACH GRAPHITERIBBON RING.

A5870-1

18A0909-D

12.7 mm

(1/2 INCH)

STEM FOR

NPS 2 VALVES

12B6102-A

NPS 3 AND 4 VALVES

(1/2 INCH)

STEM FOR

Figure 7. Detail of Graphite Ribbon/Filament Packing for Plain and Extension Bonnets

PACKING FOLLOWER (KEY 13)

GRAPHITE RIBBON PACKING RIN

19.1, 25.4, & 31.8 mm

14A3411-A

(3/8 INCH)

9.5 mm

STEM

13A9775-B

12.7 mm

(1/2 INCH)

STEM

SINGLE ARRANGEMENTS

19.1, 25.4, & 31.8 mm

14A2153-B

9.5 mm

(3/8 INCH)

STEM

14A1849-B

(1/2 INCH)

12.7 mm

STEM

DOUBLE ARRANGEMENTS

NOTE:

0.102 mm(0.004 INCH) THICK SACRIFICIAL ZINC WASHERS; USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.

A5864-1

13A9776-B

(3/4, 1 & 1-1/4 INCH)

STEM

14A1780-B

(3/4, 1 & 1-1/4 INCH)

STEM

(KEY 7)

GRAPHITE FILAMENT PACKING RIN (KEY 7)

LANTERN RING (KEY 8)

PACKING BO RING (KEY 11)

PACKING FOLLOWER (KEY 13)

GRAPHITE RIBBON PACKING RIN (KEY 7)

GRAPHITE FILAMENT PACKING RIN (KEY 7)

LANTERN RING (KEY 8)

PACKING BO RING (KEY 11)

WARNING

To avoid personal injury due to leaking fluid, avoid damaging gasket sealing surfaces. The seating surface of the valve plug (key 2) is critical for proper shutoff. Protect these surfaces accordingly.

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CAUTION

To prevent possible product damage, cover the opening in the valve in the following procedure to prevent foreign material from getting into the valve body cavity.

7. Remove the bonnet gasket (key 10, figure 13 through 15) and cover the opening in the valve to protect the gasket surface and prevent foreign material from getting into the valve body cavity.

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

9. Inspect the valve stem threads and packing box surfaces for any sharp edges which 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, replace the damaged parts by following the appropriate steps in the Trim Maintenance procedure.

10. Remove the covering protecting the valve body cavity and install a new bonnet gasket (key 10, figure 13 through

15), making sure the gasket seating surfaces are clean and smooth. Then slide the bonnet over the stem and onto the stud bolts (key 15, figure 13, 14, or 15) or onto the valve body cavity if cap screws (not shown) will be used instead.

Note

Proper performance of the bolting procedures in step 11 compresses the spiral wound gasket (key 12, figure 13 through 15) or load ring (key 26, figure 14) enough to both load and seal the seat ring gasket (key 13, figure 13, 14, or 15). It also compresses the outer edge of the bonnet gasket (key 10, figure 13 through 15) enough to seal the body-to-bonnet joint.

The proper bolting procedures in step 11 include--but are not limited to--ensuring that bolting threads are clean, and evenly tightening the cap screws, or the nuts onto the studs, in a crisscross pattern. Because of the boltup characteristics of spiral wound gaskets, tightening one cap screw or nut may loosen an adjacent cap screw or nut. Repeat the crisscross tightening pattern several times until each cap screw or nut is tight and the body-to-bonnet seal is made. When the operating temperature has been reached, perform this torquing procedure once again.

11. Install bolting, using proper bolting procedures during tightening so that the body-to-bonnet joint will withstand test pressures and application service conditions. The bolt torques in table 3 may be used as guidelines.

12. Install new packing and the metal packing box parts according to the appropriate arrangement in figure 3, 5, or 7. For split ring packing, alternate the positions of the splits to avoid creating a leak path. Place a smooth-edged pipe over the valve stem and gently tap each soft packing part into the packing box, being sure that air is not trapped between adjacent soft parts.

13. Slide the packing follower, upper wiper, and packing flange (keys 13, 12, and 3, figure 8) into position. Lubricate the packing flange studs (key 4, figure 8) and the faces of the packing flange nuts (key 5, figure 8). Install the packing flange nuts.

14. For spring-load ed PTFE V-ring packing, tighten the packing flange nuts until the shoulder on the packing follower (key 13, figure 8) contacts the bonnet.

For ENVIRO-SEAL or HIGH-SEAL live-loaded packing, refer to the note at the beginning of the Maintenance section.

For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 4. Then, loosen the packing flange nuts, and retighten them to the recommended minimumtorqueshownintable4.

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 4. Then, tighten the remaining flange nuts until the packing flange is level and at a 90-degree angle to the valve stem.

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ES Valve

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15. Mount the actuator on the valve assembly and reconnect the actuator and valve stem according to the procedure in the appropriate actuator instruction manual.

Trim Maintenance

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

CAUTION

In the following applicable procedures, to avoid damaging parts, do not grip the bellows shroud or other parts of the stem/bellows assembly. Grip only the flat areas on the stem where it extends out of the top of the bellows shroud.

Except where indicated, key numbers in this section are referenced in figure 13 for standard NPS 1/2 through 6 constructions, figure 14 for NPS 8 ES valves, figure 15 for Whisper Trim III cage detail, and figure 16 for WhisperFlo trim.

Disassembly

1. Remove the actuator and the bonnet according to steps 1 through 6 of the Replacing Packing procedure of the Maintenance section.

Table 4. Recommended Torque for Packing Flange Nuts (Not for Spring-Loaded Packing)

VALVE STEM DIAMETER

mm Inches NSm LbfSin NSm LbfSin NSm LbfSin NSm LbfSin

9.5 3/8

12.7 1/2

19.1 3/4

25.4 1

31.8 1-1/4

PRESS-URE

RATING

CL125,

150

CL250,

300

CL600 5 48 8 72 3 24 4 36

CL125,

150

CL250,

300

CL600 10 84 14 120 5 42 7 60

CL125,

150

CL250,

300 CL600 20 180 30 264 10 90 15 132 CL300 24 216 37 324 12 108 16 144 CL600 34 300 50 444 16 144 24 216 CL300 33 288 49 432 16 144 24 216 CL600 45 396 66 588 22 192 33 288

Minimum Torque Maximum Torque Minimum Torque Maximum Torque

11 96 16 144 5 48 8 72

14 120 20 180 7 60 10 90

GRAPHITE TYPE PACKING PTFE TYPE PACKING

3 24 5 48 1 12 3 24

4 36 7 60 2 18 3 30

5 48 8 72 3 24 4 36

7 60 10 84 3 30 5 42

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