Fisher Maintenance Packing System for Fisher Sliding-Stem Valves in Power Plant Applications Manuals & Guides

Instruction Manual

D104566X012

Maintenance Packing System for Sliding-Stem Valves

October 2020

Maintenance Packing System for Fisher

™

Sliding-Stem Valves in Power Plant Applications

Contents

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

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

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

Installation 3..................................

Tightening Procedures 4.......................

Other Considerations 5..........................

Parts Ordering 5................................

Figure 1. Fisher easy-e Valve Bonnet with
Maintenance Packing System

PACKING
FLANGE

PACKING
FOLLOWER

VALVE
BONNET

W5814-1*

VALVE
STEM

BELLEVILLE
SPRINGS

Introduction

Scope of Manual

This instruction manual includes installation and parts information for a Maintenance Packing System that uses
ENVIRO-SEAL™ live-loaded components (see figure 1). This system can be installed in Fisher Sliding-Stem valves with

12.7, 19.1, 25.4, 31.8 mm, and 50.8 mm (1/2, 3/4, 1, 1-1/4, and 2-inch) diameter stems as shown in table 2. Refer to
appropriate valve and actuator instruction manuals for necessary information relating to the disassembly and
assembly of the valve and actuator.

Do not install, operate, or maintain Maintenance Packing Systems 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

www.Fisher.com

before proceeding.

Maintenance Packing System for Sliding-Stem Valves

October 2020

Table 1. Specifications

Instruction Manual

D104566X012

Applicable Product Types and Stem Diameters

See table 2

Pressure Limit

(1)

Temperature Limits

Minimum: -40°C (-40°F)
Maximum: 524°C (975°F)

(2)

Maximum Pressure: 310 bar (4500 psi)

1. The pressure/temperature limits in this manual, in the valve literature, and any applicable code or standard limitation, should not be exceeded.

2. The valves shown are only guidelines. These guidelines can be exceeded, but shortened packing life or increased leakage might result. The temperature ratings apply to the actual packing
temperature, not to the process temperature.

Description

This Maintenance Packing System is available only for field Installation in Fisher valves. It is intended for use in Steam
Service in conventional (non-nuclear) power plants that exceed the pressure and temperature limits of ENVIRO-SEAL
packing offerings.

This system is intended for use only in non-environmental applications and has not been tested for fugitive emission
service. The external live-loading provides elevated packing stress and compensates for packing wear and
consolidation. Periodic adjustment of the packing nuts may be required until the packing nut torque stabilizes.

Maintenance Packing System systems utilize Belleville (coned-disk) springs located on a PTFE lined follower. If the
piping and valve are insulated, do not allow insulation to extend above the yoke boss surface. Insure the packing
follower is exposed to ambient air conditions to provide adequate cooling. For applications that exceed the
temperature capability of the standard PTFE lined follower, a PEEK lined follower is available. Contact your Emerson

sales office for details.

Table 2. Fisher Sliding-Stem Product Availability for Maintenance Packing System

VALVE TYPE

(ED, ES, ET, EW, EZ)

1. Contact your Emerson sales office for valves not listed.

(1)

A X X X X - - -

CAV4 - - - X X X X

DBQ X X X X - - -

easy-e

EH X X X X X

ENA - - - - - - - - - X X

FB - - - - - - X X X

HP X X X X - - -

YD X X X X - - -

YS X X X X - - -

12.7

(1/2)

X X X X - - -

19.1

(3/4)

STEM DIAMETER, mm (INCHES)

25.4
(1)

31.8

(1-1/4)

50.8
(2)

2

Instruction Manual

D104566X012

Maintenance Packing System for Sliding-Stem Valves

October 2020

Installation

If you are changing the packing system, it is good practice to review actuator sizing, as packing friction will change.
See tables 3 and 4 for information on packing friction.

WARNING

Avoid personal injury from sudden release of process pressure or uncontrolled movement of parts. 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

from 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 other hazards that may be present from exposure to process media.

If you are installing the system in a valve that is still connected to an actuator, remove the actuator from the valve to
provide sufficient space to install the packing assembly. If a spring-return actuator is used, it is possible that
disconnecting the stem connector will allow the spring to force the actuator to the end of its travel. Be sure the
actuator spring is resting on its travel stop. Refer to the appropriate valve and actuator instruction manuals to remove
the actuator.

Remove old packing parts from the packing box by using the valve instruction manual procedures. Both the valve stem
surface condition and the packing bore are critical in obtaining a good seal. If the valve stem surface is scratched,
nicked, or worn, replace the valve stem before installing the Maintenance Packing System. Check the condition of the
packing bore and clean or hone it out, as necessary. Refer to the appropriate valve instruction manual to replace the
valve stem.

Then proceed as follows:

1. The original packing flange studs used for standard packing arrangements should be long enough to accommodate
the retrofit kit parts. If you determine that the existing studs and nuts should be replaced however, due to their
condition, replace them with the studs and nuts (keys 200 and 212) specified in the parts section of this manual.

2. Carefully remove the old packing parts from the packing box. If the valve stem or packing box wall is scratched or
damaged, it can cause excessive leakage. If the valve stem needs to be replaced, or any other valve part, refer to the
appropriate valve instruction manual for replacement procedures. Complete all valve maintenance before installing
the Maintenance Packing System into the bonnet.

Table 3. Packing Friction at Ambient Temperature

VALVE STEM DIAMETER MAINTENANCE PACKING

mm Inches Newtons Pounds (Force)

12.7

19.1

25.4

31.8

1/2
3/4

1

1-1/4

1980
4580
7250
9470

445
1030
1630
2130

3

Maintenance Packing System for Sliding-Stem Valves

(1)

October 2020

Instruction Manual

D104566X012

Table 4. Packing Friction at Elevated Temperature 3155C (6005F)

VALVE STEM DIAMETER MAINTENANCE PACKING

mm Inches Newtons Pounds (Force)

12.7

19.1

25.4

31.8

1/2
3/4

1

1-1/4

760
1730
2740
3560

170
390
615
800

Note

Ensure the Belleville springs are stacked properly and packing box parts are assembled in the correct order (see figure 2). Packing
parts cannot function properly if the Belleville springs or other packing parts are not stacked correctly.

3. Use figure 2 to ensure that the packing parts and spring pack are assembled in the correct order. Install the packing
parts into the packing box.

4. Install the spring pack assembly (key 217), with the attached springs, onto the stem. Remove the O-Ring and
discard it.

5. Install the packing flange (key 201) with the chamfer away from the springs as shown in figure 2. Install the packing
box nuts (key 212). Hand tighten them.

Note

Lubrication (key 213) is required for the packing studs and nuts.

Although it is important to properly lubricate the stud threads and internal nut threads, it is also important to properly lubricate
the contacting face of the nut. See figure 2 for lubrication locations.

Tightening Procedures

1. The intended packing stress for this system is approximately 6000 psi which requires the Belleville springs to be
compressed 85% of their maximum deflection. The torque values in table 5 can be used as a guideline for 85%
spring compression. These values are based on generous lubrication of the packing studs and nuts with a nickel
anti-seize lubricant.

2. Refer to the appropriate valve and actuator instruction manuals when connecting the valve to the actuator. The
braided components in this packing system require significant consolidation before the nut torque will stabilize.
Stroke the valve and retorque until the consolidation process is complete and the specified packing nut torque is
maintained.

Table 5. Packing Nut Torque for 414 bar (6000 psi) Packing Stress

STEM SIZE TORQUE

mm Inch NSm lbfSin lbfSft

12.7 1/2 11.4 100 8.4

19.1 3/4 28.5 250 21

25.4 1 64 560 47

31.8 1-1/4 75 660 55

1. For A, DBQ, easy-e, EH, FB, HP, YD, and YS valves.

4

Instruction Manual

D104566X012

Maintenance Packing System for Sliding-Stem Valves

October 2020

Other Considerations

Check the condition of the packing bore after you have removed the packing. An easy method for cleaning debris and
minor imperfections from the bore is to use a brake cylinder hone attached to an electric drill. This method often does
a good job of cleaning the packing bore without changing the dimension of the bore. Inspect the packing bore for
damage. Damaged packing bores must be repaired or replaced.

Parts Ordering

Each valve assembly is assigned a serial number that can be found on the valve body. Refer to this serial number when
contacting your Emerson sales office
number and to the part description and part number from the following parts list. When ordering replacement parts,
refer to the serial number and the 11-character part number for each part required from the following parts list.

WARNING

Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Automation Solutions 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.

for technical assistance. When ordering replacement parts, refer to this serial

5

Maintenance Packing System for Sliding-Stem Valves

October 2020

Instruction Manual

D104566X012

Parts List

Key Description

200 Stud See following table
 201 Packing Flange See following table
 207* Guide Bushing See following table
 209* Packing Ring See following table
 210* Packing Ring See following table
 211 Packing Box Ring See following table

Table 6. Maintenance Packing Components for Fisher easy-e Valves (see figure 2)

KEY

NUMBER

200 Stud 1E944435222 2 1E944935222 2 0V002535222 2 1N356535222 2 1C7725X0032 3

201 Packing Flange 12B6924X012 1 12B6925X012 1 12B6654X012 1 12B6680X012 1 GE26167X012 1

207* Guide Bushing 12B5782X012 6 12B5784X012 5 12B5786X012 5 12B5788X012 5 12B5790X012 5

209* Packing Ring 12B5799X012 2 12B5800X012 2 12B5801X012 2 12B5802X012 2 12B5803X012 2

210* Packing Ring 14B7498X012 2 14B7520X012 2 14B7521X012 2 14B7522X012 2 17B3077X012 2

211 Packing Box Ring 12B5775X012 1 12B5776X012 1 12B5777X012 1 12B5778X012 1 12B5779X012 1

212 Packing Nut 1E944535252 2 1E944635252 2 1A343335252 2 1A368135252 2 1A440935252 3

213*

214* Packing Washer 12B6937X012 3 12B6938X012 3 12B6939X012 3 12B6940X012 3 19B4144X012 3

217

220* Packing Ring 1E3190X0652 3 1E3191X0542 3 1D7518X0292 3 1D7520X0282 3 1N2600X0072 3

221* Packing Washer GH08637X012 4 GE63540X022 4 GH08638X012 4 GH08639X012 4 GH08640X012 4

PACKING

COMPONENT

Anti-Seize
Lubricant

Spring Pack
Assembly

12.7

(1/2)

GH08641X012 1 GH08641X022 1 GH08641X032 1 GH08641X042 1 GH08641X052 1

QTY

19.1

(3/4)

Key Description

212 Packing Nut See following table
 213* Anti-Seize Lubricant See following table
 214* Packing Washer See following table
 217 Spring Pack Assembly See following table
 220* Packing Ring See following table
 221* Packing Washer See following table

VALVE STEM SIZE, mm (INCHES)

QTY

25.4
(1)

Not provided with packing

QTY

31.8

(1-1/4)

QTY

50.8
(2)

QTY

6

*Recommended spare parts

Instruction Manual

D104566X012

Figure 2. Maintenance Packing for Fisher easy-e Valves

Maintenance Packing System for Sliding-Stem Valves

October 2020

APPLY LUB

GH07970-B

7

Maintenance Packing System for Sliding-Stem Valves

October 2020

Instruction Manual

D104566X012

Neither Emerson, Emerson Automation Solutions, 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.

Fisher, ENVIRO-SEAL, and easy-e are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co.
Emerson Automation Solutions, 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.

Emerson Automation Solutions

Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore

www.Fisher.com

8

E 2020 Fisher Controls International LLC. All rights reserved.