Fisher Fisher GX 3-Way Control Valve and Actuator System Manuals & Guides

Instruction Manual

D103312X012

GX 3-Way Valve and Actuator

July 2017

Fisher

™

GX 3‐Way Control Valve and Actuator

System

Contents

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

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

Description 1.................................

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

Educational Services 2.........................

Valve Installation 2.............................

Maintenance 3.................................

Actuator Maintenance 5........................

Packing Maintenance 9.........................

Replacing Packing (Pneumatic Actuators) 9........

Replacing Packing (Electric Actuators) 12.........

Valve Trim Maintenance 15.....................

Parts Kits 19...................................

Parts List 20...................................

Figure 1. Fisher GX 3‐Way Control Valve, Actuator,
and FIELDVUE DVC2000 Digital Valve Controller

W9557

GX 3-WAY

X0218

GX 3-WAY

HIGH-TEMPERATURE

Introduction

Scope of Manual

This instruction manual includes installation, maintenance, and parts information for the Fisher GX 3‐Way control
valve and actuator system.

Do not install, operate, or maintain a GX 3-Way 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 sales office
proceeding.

Description

The GX 3‐Way meets the requirements of both EN and ASME standards. It is available with a complete accessory
package, including the FIELDVUE

™

DVC2000 integrated digital valve controller.

or Local Business Partner before

www.Fisher.com

GX 3-Way Valve and Actuator

July 2017

Instruction Manual

D103312X012

Table 1. Fisher GX 3‐Way Valve Specifications

Specifications EN ASME

Valve Body Sizes DN 25, 40, 50, 80, 100 NPS 1, 1‐1/2, 2, 3, 4

Pressure Rating PN 10 / 16 / 25 / 40 per EN 1092‐1 CL150 / 300 per ASME B16.34

End Connections Flanged raised face per EN 1092‐1 Flanged raised face per ASME B16.5

Valve Body Materials

Bonnet Materials 1.4409 stainless steel / CoCr‐A ASME SA351 CF3M SST / CoCr‐A

Face‐to‐Face Dimensions Based on ISA 75.08.01, see bulletin 51.1:GX 3-Way for details

Shutoff per IEC 60534‐4 and

ANSI/FCI 70‐2

Flow Direction Converging and Diverging

Trim Style

1. Stainless steel valve body is recommended for steam service when the high temperature (HT) construction is selected.

1.4409 stainless steel ASME SA351 CF3M stainless steel

Side port common high temperature construction: Metal seat - Class IV for bottom seat, Class II for upper seat

Side‐Port Common All sizes Unbalanced Port‐Guided

Bottom‐Port Common All sizes Balanced Cage‐Guided

(1)

1.0619 steel ASME SA216 WCC steel

Metal seat ‐ Class IV (standard)

Type Plug Style Type

Educational Services

For information on available courses for the Fisher GX 3-Way control valve and actuator system, as well as a variety of
other products, contact:

Emerson Automation Solutions
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [e-mail]
emerson.com/fishervalvetraining

Valve 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 or bursting of pressure retaining parts might
result if service conditions exceed those for which the product was intended. To avoid injury or damage, provide a relief
valve for over pressure protection 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

This valve is intended for a specific range of pressures, temperatures and other application specifications. Applying
different pressure and temperatures to the valve could result in parts damage, malfunction of the control valve or loss of
control of the process. Do not expose this product to service conditions or variables other than those for which the product was
intended. If you are not sure what these conditions are you should contact your Emerson sales office
Partner for more complete specifications. Provide the product serial number (shown on the nameplate, figure 2) and all
other pertinent information.

or Local Business

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July 2017

WARNING

If you move or work on an actuator installed on a valve with loading pressure applied, keep your hands and tools away from
the stem travel path to avoid personal injury. Be especially careful when removing the stem connector to release all loading
on the actuator stem whether it be from air pressure on the diaphragm or compression in the actuator springs. Likewise
take similar care when adjusting or removing any optional travel stop. Refer to the relevant actuator Maintenance
Instructions.

If hoisting the valve take care to prevent people from being injured in case the hoist or rigging slips. Be sure to use
adequately sized hoists and chains or slings to handle the valve.

Figure 2. Fisher GX 3‐Way Nameplate (Key 35)

GE35409-D

GG12218-A

ELECTRIC ACTUATOR

1. Before installing the valve, inspect it to be certain that the valve body cavity is free of all foreign material. Clean out

all pipelines to remove scale, welding slag and other foreign material.

2. 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 trim 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 sales office

or Local Business Partner. Flow through the valve must be in the

direction indicated by the flow arrow nameplate on the valve. See figures 3 and 4.

3. Use accepted piping practices when installing the valve in the pipeline. Use a suitable gasket between the valve and

the pipeline flanges.

4. If continuous operation is required during inspection or maintenance, install isolating valves on either side of the

control valve with a bypass valve to control the flow while the control valve is receiving maintenance.

WARNING

Personal injury could result from packing leakage. Valve packing is tightened before shipment; however the packing might
require some readjustment to meet specific service conditions.

Maintenance

WARNING

Avoid personal injury or property damage from sudden release of process pressure or bursting 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.

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D Use bypass valves or completely shut off the process to isolate the valve from the process pressure. Relieve the process

pressure from all three inlets/outlet of the valve.

D Depending on the actuator construction, it will be necessary to manage the pneumatic actuator loading pressure and

any actuator spring pre‐compression. It is essential to refer to the relevant actuator instructions in this manual to
ensure safe removal of the actuator from the valve.

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.

Figure 3. Fisher GX 3‐Way Valve Bottom‐Port Common Flow Direction

GE37477_FLOWDIR

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Figure 4. Fisher GX 3‐Way Valve Side‐Port Common Flow Direction

GX 3-Way Valve and Actuator

July 2017

GE37477_FLOWDIR

Table 2. Fisher GX 3‐Way Rated Travel

VALVE SIZE

NPS mm mm

1, 1‐1/2 225 6 19 21

2 750 10 19 21

3, 4 750 10 38 40

ACTUATOR SIZE

NUMBER OF CASING

BOLTS

TRAVEL STEM CONNECTOR GAP SETTINGS

Table 3. Body Nut (Key 7) Torque Requirements

VALVE SIZE

DN 25 and 40 (NPS 1 and 1‐1/2) 79.8 58.9

DN 50 (NPS 2) 163 120

DN 80 and 100 (NPS 3 and 4) 282 208

NSm lbfSft

Note

Whenever a gasket seal is disturbed by removing or shifting gasketed parts, install a new gasket during reassembly. This ensures a
good gasket seal because the used gasket may not seal properly.

TORQUE

Actuator Maintenance

For electric actuators, see the supplier's instruction manual.

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The following sections provide procedures for actuator maintenance. Refer to figures 8, 11, and 13.

The actuator soft parts may require periodic replacement. This includes the diaphragm (key 10), diaphragm O-ring
(key 109), actuator rod bushing (key 19), and the actuator rod seal (key 20).

If the actuator stroking direction is unknown, refer to the nameplate on top of the actuator casing and figure 2.

Note

When the GX 3‐Way actuator is equipped with the integrated FIELDVUE DVC2000 digital valve controller (figure 1), additional
considerations may be required. Refer to the FIELDVUE DVC2000 Digital Valve Controller quick start guide, D103203X012
mounting instructions.

, for

Actuator Disassembly (For Fail‐Down Constructions, see figure 11)

1. Connect a separate air supply to the lower diaphragm casing via the air supply connection on the yoke (as shown in

figure 11) and apply sufficient air pressure to raise the valve plug/stem off the lower seat to mid‐travel.

2. Remove the stem connector nut half (key 23), stem connector bolt half (key 24), and travel indicator (key 26).

3. Push the valve plug/stem (key 3) down until it contacts the seat.

4. Loosen the locknut (key 28) and thread the lower stem connector (key 27) down until it clears the top of the valve

plug/stem (key 3).

D For HT construction, loosen locknut (key 108) and thread the stem extension (key 106) down as far as possible

(see figure 12).

5. Shut off the air pressure and disconnect the separate air supply to the lower diaphragm casing (as shown in figure

11).

WARNING

To avoid personal injury or property damage due to actuator springs (key 12) being under compression, remove the long
cap screws (key 16) last.

The upper actuator casing may remain fixed to the diaphragm and lower casing during disassembly, even if the casing cap
screws have been loosened. If this happens, the actuator springs are still under compression. The upper casing could
suddenly come loose and jump, due to the compressed energy of the springs. If the upper casing is stuck to the diaphragm
and lower casing when you begin loosening the casing cap screws, pry the casings apart with a prying tool. Always ensure
that the springs are dispersing energy and the upper casing is moving against the long bolts during disassembly.

6. Remove the short actuator casing cap screws and hex nuts (keys 17 and 18) first. Once these have been removed

from the actuator assembly, carefully remove the long actuator cap screws and hex nuts (keys 16 and 18),
alternating between them to gradually release the spring energy (compression).

7. Remove the upper diaphragm casing (key 9) and the actuator springs (key 12).

8. Lift off the actuator stem/diaphragm assembly (includes keys 22, 11, 10, 14, 13, 109, and 15) and remove the cap

screw (key 14), actuator spacer (key 13), actuator rod (key 22), and washer (key 15).

9. Replace the diaphragm (key 10), actuator rod bushing (key 19), actuator rod seal (key 20), and diaphragm O-ring

(key 109), as needed.

Actuator Disassembly (For Fail‐Up Constructions, see figure 8)

1. Connect a separate air supply to the air supply connection on the upper casing (shown in figure 8) and apply

sufficient air pressure to move the plug/stem to mid‐travel.

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2. Remove the stem connector nut half (key 23), stem connector bolt half (key 24), and travel indicator (key 26).

3. Shut off the air pressure and disconnect the air supply to the upper casing.

WARNING

To avoid personal injury or property damage due to actuator springs (key 12) being under compression, remove the long
cap screws (key 16) last.

The upper actuator casing may remain fixed to the diaphragm and lower casing during disassembly, even if the casing cap
screws have been loosened. If this happens, the actuator springs are still under compression. The upper casing could
suddenly come loose and jump, due to the compressed energy of the springs. If the upper casing is stuck to the diaphragm
and lower casing when you begin loosening the casing cap screws, pry the casings apart with a prying tool. Always ensure
that the springs are dispersing energy and the upper casing is moving against the long bolts during disassembly.

4. Remove the short actuator casing cap screws and hex nuts (keys 17 and 18) first. Once these have been removed

from the actuator assembly, carefully remove the long actuator cap screws and hex nuts (keys 16 and 18),
alternating between them to gradually release the spring energy (compression).

5. Remove the upper diaphragm casing (key 9).

6. Lift off the actuator stem/diaphragm assembly (includes keys 22, 11, 10, 14, 13, 109, and 15) and remove the cap

screw (key 14), actuator spacer (key 13), actuator rod (key 22), and washer (key 15).

7. Remove the actuator springs (key 12).

8. Replace the diaphragm (key 10), actuator rod bushing (key 19), actuator rod seal (key 20), and diaphragm O-ring

(key 109), as needed.

Actuator Assembly (For Fail‐Down Constructions, see figure 11)

1. Install the diaphragm (key 10) on the diaphragm plate (key 11). Insert the cap screw (key 14) through the actuator

spacer (key 13) and place this assembly through the diaphragm/diaphragm plate assembly.

2. Place the diaphragm O-ring (key 109) and the washer (key 15) over the center hole of the diaphragm, so that the

convex part of the washer is facing down toward the diaphragm and contains the O-ring. Ensure the convex part of
the washer is guided in the diaphragm center hole as shown in figure 11.

3. Screw the actuator rod (key 22) onto the cap screw (key 14) and torque to 80.0 NSm (59.1 lbfSft). Install the

actuator stem/diaphragm assembly back into the actuator yoke (key 8).

4. Place the actuator springs (key 12) onto the spring locators in the diaphragm plate (key 11).

5. Install the upper diaphragm casing (key 9) so that the ribs on the top of the upper diaphragm casing are

perpendicular with the yoke legs.

6. Install the 2 long cap screws (key 16) and hex nuts (key 18) 180 degrees apart from each other and in line with the

actuator yoke legs.

7. Tighten the long cap screws (key 16) and hex nuts (key 18), alternating between them to gradually compress the

springs, until the two casing halves and diaphragm touch.

8. Install the remaining short cap screws (key 17) and hex nuts (key 18) to the casing.

9. Tighten the actuator casing cap screws evenly using a cross‐tightening procedure. Torque to 55 NSm (40 lbfSft).

10. If you had previously removed the actuator assembly from the valve, place the actuator assembly back onto the

valve body (key 1) or yoke extension (key 105, figure 12) for HT constructions. Install the four body nuts (key 7), but
tighten them only finger‐tight.

11. Connect a separate air supply to the actuator air supply connection (as shown on the yoke in figure 11) and apply

sufficient air pressure to raise the actuator rod (key 22) to the travel stop.

12. Tighten the body nuts (key 7) evenly using a cross‐tightening procedure. See table 3 for torque requirements.

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D For HT constructions, the valve body nuts (key 7) are tightened at the valve body (key 1) and at the top of the

yoke extension (key 105), see figure 12.

13. With the valve plug/stem (key 3) on the lower seat, thread the lower stem connector (key 27) up to match the gap

setting between the actuator rod and stem adjuster nut specified in table 2. Thread the locknut (key 28) up against
the stem adjustor nut and tighten to a torque of 48 NSm (35 lbfSft) for the 10mm stems or 175 NSm (129 lbfSft) for
14mm stems.

D For HT constructions see figure 12. With the valve plug/stem (key 3) on the lower seat, thread the stem

extension (key 106) up to match the gap setting between the actuator rod and stem extension specified in
table 2. Thread the locknut (key 108) up against the stem extension and tighten to a torque of 48 N•m (35
lbf•ft) for the 10mm stems or 175 N•m (129 lbf•ft) for 14mm stems.

14. Stroke the actuator rod until it contacts the lower stem connector (key 27), or the stem extension (key 106, figure

12) for HT construction, and install the stem connector halves and travel indicator (keys 23, 24, and 26) with the
cap screws (key 25). Install the stem connector halves in the proper orientation so that when looking at the inside of
the stem connector halves, the flats are down and the beveled surfaces are up.

15. Align the pointer of the travel indicator (key 26) with the appropriate mark on the travel scale.

16. Tighten the stem connector cap screws (key 25) to 35 NSm (26 lbfSft).

17. Release the actuator pressure.

Actuator Assembly (For Fail‐Up Constructions, see figure 8)

1. Position the upper diaphragm casing (key 9) upside down on the bench so that it lays flat and not off balance.

Note

If converting from fail‐down to fail‐up action, first move the vent cap (key 21) from the top of the casing (see figure 8) and thread
into the air supply connection on the yoke leg (see figure 11).

2. Install the diaphragm (key 10) on the diaphragm plate (key 11). Place the diaphragm O-ring (key 109) and the

washer (key 15) over the center hole of the diaphragm, so that the convex part of the washer is facing down toward
the diaphragm and contains the O-ring. Ensure the convex part of the washer is guided in the diaphragm center
hole as shown in figure 8.

3. Insert the cap screw (key 14) through the washer and diaphragm, install the actuator spacer (key 13), and screw the

actuator rod (key 22) onto the cap screw (key 14) finger‐tight.

4. Radially align the spring locators in the diaphragm plate assembly (key 11) with the casing cap screw holes in the

diaphragm (key 10). This will ensure that the springs do not cover the air path in the yoke.

5. Torque the cap screw (key 14) to the actuator rod (key 22) to 80.0 NSm (59.1 lbfSft) and lay this assembly into the

upper diaphragm casing (key 9).

6. Place the actuator springs (key 12) onto the spring locators in the diaphragm plate (key 11).

7. Set the actuator yoke (key 8) down onto the assembly that is resting in the upper diaphragm casing (key 9) so that

the yoke legs are perpendicular with the ribs on the top of the upper diaphragm casing (key 9).

8. Install the 2 long cap screws (key 16) and hex nuts (key 18) 180 degrees apart from each other and in line with the

actuator yoke legs.

9. Tighten the long cap screws (key 16) and hex nuts (key 18), alternating between them to gradually compress the

springs, until the two casing halves and diaphragm touch.

10. Install the remaining short cap screws (key 17) and hex nuts (key 18) to the casing.

11. Tighten the actuator casing cap screws evenly using a cross‐tightening procedure. Torque to 55 NSm (40 lbfSft).

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12. If you had previously removed the actuator assembly from the valve, place the actuator assembly back onto the

valve body (key 1) or yoke extension (key 105, figure 12) for HT construction. Install the body nuts (key 7) and
tighten evenly using a cross‐tightening procedure. See table 3 for torque requirements.

D For HT constructions, see figure 12. Ensure the valve body nuts (key 7) are tightened at the valve body (key 1)

and at the top of the yoke extension (key 105).

13. With the valve plug/stem (key 3) on the lower seat, thread the lower stem connector (key 27) up to match the gap

setting between the actuator rod and stem adjustor nut specified in table 2. Thread the locknut (key 28) up against
the stem locknut and tighten to a torque of 48 NSm (35 lbfSft) for 10mm stems or 175 NSm (129 lbfSft) for 14mm
stems.

D For HT constructions see figure 12. With the valve plug/stem (key 3) on the lower seat, thread the stem

extension (key 106) up to match the gap setting between the actuator rod and stem extension specified in
table 2. Thread the locknut (key 108) up against the stem extension and tighten to a torque of 48 N•m (35
lbf•ft) for the 10mm stems or 175 N•m (129 lbf•ft) for 14mm stems.

14. Stroke the actuator rod until it contacts the lower stem connector (key 27), or stem extension (key 106, figure 12),

and install the stem connector halves and travel indicator (keys 23, 24, and 26) with the cap screws (key 25). Install
the stem connector halves in the proper orientation so that when looking at the inside of the stem connector
halves, the flats are down and the beveled surfaces are up.

15. Align the pointer of the travel indicator (key 26) with the appropriate mark on the travel scale.

16. Tighten the stem connector cap screws (key 25) to 35 NSm (26 lbfSft).

GX 3-Way Valve and Actuator

July 2017

Note

For fail‐up action, the air supply tubing must be connected to the actuator upper casing at the air supply connection, see figure 8.
(If converting from fail‐down to fail‐up, the tubing will need to be re‐routed to this location).

Packing Maintenance

Key numbers refer to figure 7.

Packing Adjustment

For ENVIRO-SEAL™ spring‐loaded single PTFE V‐ring packing (figure 7) or for ENVIRO-SEAL graphite ULF packing (figure

7), the Belleville spring pack (key 34) maintains a sealing force on the packing. If leakage is detected around the
packing follower (key 29) check to be sure that the packing follower (key 29) is tight. Using a wrench, tighten the
packing follower (key 29) in 1/4 turn intervals until the leakage is stopped. If leakage cannot be stopped in this
manner, proceed to the Replacing Packing section in this manual.

Replacing Packing (Pneumatic Actuators)

Isolate the control valve from the line pressure, release pressure from all three inlets/outlets of the valve body and
drain the process media from the valve. Shut off all pressure lines to the actuator and release all pressure from the
actuator. Use lock‐out procedures to ensure that the above measures stay in effect while you work on the equipment.

1. For fail‐down constructions, as shown in figure 11:

a. Connect a separate air supply to the lower diaphragm casing via the air supply connection on the yoke (as shown

in figure 11) and apply sufficient air pressure to raise the valve plug/stem off the lower seat to mid travel.

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b. Remove the stem connector nut half (key 23), stem connector bolt half (key 24), and travel indicator (key 26).

c. Push the valve plug stem (key 3) down until it contacts the lower seat.

d. Loosen the locknut (key 28) and thread the lower stem connector (key 27) down until it clears the top of the

valve plug stem (key 3).

D For HT construction, loosen locknut (key 108) and thread the stem extension (key 106) down as far as possible

(see figure 12).

e. Shut off the air pressure and disconnect the separate air supply to the lower diaphragm casing (as shown in figure

11).

WARNING

To avoid personal injury or property damage by uncontrolled movement of the actuator yoke (key 8), loosen the body/yoke
nuts (figure 11, key 7) by following the instructions in the next step. Do not remove a stuck actuator yoke 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 actuator yoke.

Note

The following step also provides additional assurance that the valve body fluid pressure has been relieved.

2. For fail‐up constructions, as shown in figure 8:

a. Connect a separate air supply to the air supply connection on the upper casing (shown in figure 8) and apply

sufficient air pressure to move the plug/stem to mid‐travel.

b. Remove the stem connector nut half (key 23), stem connector bolt half (key 24), and travel indicator (key 26).

c. Shut off the air pressure and disconnect the air supply to the upper casing.

3. Valve body nuts (key 7) attach the actuator yoke (key 8) to the valve body (key 1). Loosen these nuts approximately

3mm (1/8 inch).

D For HT constructions, see figure 12. Nuts (key 7) attach the yoke extension (key 105) to the valve body (key 1).

Loosen these nuts approximately 3mm (1/8 inch). It is not necessary to loosen the nuts which attach the
actuator yoke (key 8) to the yoke extension.

4. Then loosen the valve‐to‐yoke gasketed joint by either rocking the actuator yoke or prying between the valve and

yoke. Work the prying tool around the yoke until it loosens.

WARNING

If there is evidence of process fluid under pressure leaking from the joint, retighten the valve body/joint nuts and return to
the Warning at the beginning of the Maintenance section to ensure proper steps have been taken to isolate the valve and
relieve process pressure.

5. If no fluid leaks from the joint, loosen the packing follower (key 29) two turns to relieve the packing compression

load.

6. Remove the body nuts (key 7) completely.

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CAUTION

To avoid property damage, place the actuator yoke on a protective surface, as described in the following procedure.

7. Carefully lift off the actuator and set it on a protective surface to prevent damage. If the bonnet (key 4) together

with the valve stem plug assembly has a tendency to lift with the actuator, ensure it does not drop from the
actuator.

8. Remove the lower stem connector (key 27) and locknut (key 28).

D For HT constructions, see figure 12. Remove the stem extension (key 106) and locknut (key 108).

9. Remove the bonnet and the valve plug/stem assembly and set on a protective surface.

10. Remove the valve/yoke gasket (key 5) and cover the opening of the valve to protect the gasket surface and

prevent foreign matter from getting into the valve cavity.

11. Remove the packing follower (key 29) from the bonnet (key 4).

12. Remove the Belleville spring pack (key 34) and packing spacer (key 30) from the bonnet (key 4). Carefully push out

the remaining packing box parts from the bonnet (key 4) using a rounded rod or other tool which will not scratch
the packing box wall. Clean the packing box and the metal packing box parts.

CAUTION

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 the new packing.

13. 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 the new packing. If the surface condition cannot be
improved by light sanding, replace the damaged parts.

14. Remove the covering protecting the valve cavity and install a new valve/yoke gasket (key 5) making sure that the

gasket seating surfaces are clean and smooth.

Table 4. Packing Follower Torque

Valve Size Packing Style Torque NSm (lbfSft) Packing Style Torque NSm (lbfSft)

DN25 and 40 ENVIRO-SEAL PTFE 10 (7.4) ENVIRO-SEAL ULF 35 (26)

DN50, 80, and 100 ENVIRO-SEAL PTFE 23 (17) ENVIRO-SEAL ULF 50 (37)

15. Install a new O‐ring (key 81) in the groove on the bottom of the side‐port common bonnet (key 4). See figure 9.

Apply a general purpose silicone base lubricant.

D For HT constructions, see figure 12. Install a new graphite seal ring (key 107). Apply a general purpose silicone

base lubricant.

16. Carefully install the bonnet (key 4) onto the valve stem.

17. Install the new packing and the metal packing box parts according to figure 7 for ENVIRO-SEAL PTFE packing and

according to figure 7 for ENVIRO-SEAL graphite ULF packing. Place a smooth‐edged pipe over the valve stem and
gently tap each soft packing part into the packing box. Apply anti‐seize lubricant to the threads and install the
packing follower (key 29).

18. Install the locknut (key 28) and lower stem connector (key 27). Install the valve plug/bonnet sub assembly into the

valve body (key 1).

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GX 3-Way Valve and Actuator

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D For HT constructions, see figure 12. Install the locknut (key 108) and stem extension (key 106). Install the valve

plug/bonnet sub assembly into the valve body (key 1).

19. Mount the actuator onto the valve and install the body nuts (figure 8 key 7), but tighten them only finger‐tight.

20. For fail‐down constructions, connect a separate air supply to the lower diaphragm casing air supply connection (as

shown in figure 11) and apply sufficient air pressure to raise the actuator rod (key 22) to the travel stop. Proceed to
the next step.
For fail‐up constructions, proceed to the next step.

21. Tighten the valve body nuts (key 7) evenly using a cross‐tightening procedure. See table 3 for torque

requirements.

D For HT constructions, see figure 12. Ensure the valve body nuts (key 7) are tightened at the valve body (key 1)

and at the top of the yoke extension (key 105).

22. Thread the lower stem connector (key 27) up to match the gap setting between the actuator rod and stem

adjustor nut specified in table 2. Thread the locknut (key 28) up against the stem locknut and tighten to a torque of
48 NSm (35 lbfSft) for 10mm stems or 175 NSm (129 lbfSft) for 14mm stems.

D For HT constructions see figure 12. With the valve plug/stem (key 3) on the lower seat, thread the stem

extension (key 106) up to match the gap setting between the actuator rod and stem extension specified in
table 2. Thread the locknut (key 108) up against the stem extension and tighten to a torque of 48 N•m (35
lbf•ft) for the 10mm stems or 175 N•m (129 lbf•ft) for 14mm stems.

Instruction Manual

D103312X012

23. Stroke the actuator rod until it contacts the lower stem connector (key 27) or stem extension (key 106, figure 12)

and install the stem connector halves and travel indicator (keys 23, 24, and 26) with the cap screws (key 25). Install
the stem connector halves in the proper orientation so that when looking at the inside of the stem connector
halves, the flats are down and the beveled surfaces are up.

24. Align the pointer of the travel indicator (key 26) with the appropriate mark on the travel scale.

25. Tighten the stem connector cap screws (key 25) to 35 N•m (26 lbf•ft).

26. Tighten the packing follower (key 29) to the torque specified in table 4.

Alternately, the packing follower can be tightened by the following method:

a. Tighten the packing follower until the Belleville springs are compressed 100% (or completely flat), as detected by

a rapid increase in nut torque.

b. Loosen the packing follower 60_ of rotation.

27. For fail‐down constructions, release the actuator pressure.

28. For fail‐down constructions, ensure the vent (key 21) is installed into the upper diaphragm casing (see figure 11).

29. For fail‐up constructions, ensure the vent (key 21) is installed into the actuator yoke air supply connection. See

figure 8.

Replacing Packing (Electric Actuators)

Isolate the control valve from the line pressure, release pressure from all three inlets/outlets of the valve body and
drain the process media from the valve. Use lock‐out procedures to ensure that the above measures stay in effect
while you work on the equipment.

1. Stroke the actuator so the valve plug/stem (key 3) is at mid travel.

2. Remove the stem connector nut half (key 23), stem connector bolt half (key 24), and travel indicator (key 26).

3. Use precaution to ensure the actuator is locked in position and cannot stroke.

4. Mark the position of the locknut (key 28) on the stem for reassembly.

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July 2017

5. Push the valve plug stem (key 3) down until it contacts the lower seat.

6. Loosen the locknut (key 28) and thread the lower stem connector (key 27) down until it clears the top of the valve

plug stem (key 3).

D For HT construction, loosen locknut (key 108) and thread the stem extension (key 106) down as far as possible

(see figure 12).

WARNING

To avoid personal injury or property damage by uncontrolled movement of the actuator yoke (key 8), loosen the body/yoke
nuts (figure 11, key 7) by following the instructions in the next step. Do not remove a stuck actuator yoke 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 actuator yoke.

Note

The following step also provides additional assurance that the valve body fluid pressure has been relieved.

7. Valve body nuts (key 7) attach the actuator yoke (key 8) to the valve body (key 1). Loosen these nuts approximately

3mm (1/8 inch).

D For HT constructions, see figure 12. Nuts (key 7) attach the yoke extension (key 105) to the valve body (key 1).

Loosen these nuts approximately 3mm (1/8 inch). It is not necessary to loosen the nuts which attach the
actuator yoke (key 8) to the yoke extension.

8. Then loosen the valve‐to‐yoke gasketed joint by either rocking the actuator yoke or prying between the valve and

yoke. Work the prying tool around the yoke until it loosens.

WARNING

If there is evidence of process fluid under pressure leaking from the joint, retighten the valve body/joint nuts and return to
the Warning at the beginning of the Maintenance section to ensure proper steps have been taken to isolate the valve and
relieve process pressure.

9. If no fluid leaks from the joint, loosen the packing follower (key 29) two turns to relieve the packing compression

load.

10. Remove the body nuts (key 7) completely.

CAUTION

To avoid property damage, place the actuator yoke on a protective surface, as described in the following procedure.

11. Carefully lift off the actuator and set it on a protective surface to prevent damage. If the bonnet (key 4) together

with the valve stem plug assembly has a tendency to lift with the actuator, ensure it does not drop from the
actuator.

12. Remove the lower stem connector (key 27) and locknut (key 28).

D For HT constructions, see figure 12. Remove the stem extension (key 106) and locknut (key 108).

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GX 3-Way Valve and Actuator

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13. Remove the bonnet and the valve plug/stem assembly and set on a protective surface.

14. Remove the valve/yoke gasket (key 5) and cover the opening of the valve to protect the gasket surface and

prevent foreign matter from getting into the valve cavity.

15. Remove the packing follower (key 29) from the bonnet (key 4).

16. Remove the Belleville spring pack (key 34) and packing spacer (key 30) from the bonnet (key 4). Carefully push out

the remaining packing box parts from the bonnet (key 4) using a rounded rod or other tool which will not scratch
the packing box wall. Clean the packing box and the metal packing box parts.

CAUTION

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 the new packing.

17. 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 the new packing. If the surface condition cannot be
improved by light sanding, replace the damaged parts.

18. Remove the covering protecting the valve cavity and install a new valve/yoke gasket (key 5) making sure that the

gasket seating surfaces are clean and smooth.

19. Install a new O‐ring (key 81) in the groove on the bottom of the side‐port common bonnet (key 4). See figure 9.

Apply a general purpose silicone base lubricant.

D For HT constructions, see figure 12. Install a new graphite seal ring (key 107). Apply a general purpose silicone

base lubricant.

20. Carefully install the bonnet (key 4) onto the valve stem.

21. Install the new packing and the metal packing box parts according to figure 7 for ENVIRO-SEAL PTFE packing and

according to figure 7 for ENVIRO-SEAL graphite ULF packing. Place a smooth‐edged pipe over the valve stem and
gently tap each soft packing part into the packing box. Apply anti‐seize lubricant to the threads and install the
packing follower (key 29).

22. Install the locknut (key 28) and lower stem connector (key 27). Ensure they are aligned with the mark made on the

stem disassembly and tighten. Install the valve plug/bonnet sub assembly into the valve body (key 1).

D For HT constructions, see figure 12. Install the locknut (key 108) and stem extension (key 106). Install the valve

plug/bonnet sub assembly into the valve body (key 1).

23. Mount the actuator onto the valve and install the body nuts (figure 8 key 7), but tighten them only finger‐tight.

24. Tighten the valve body nuts (key 7) evenly using a cross‐tightening procedure. See table 3 for torque

requirements.

D For HT constructions, see figure 12. Ensure the valve body nuts (key 7) are tightened at the valve body (key 1)

and at the top of the yoke extension (key 105).

25. Push the valve plug/stem to the valve seat. Thread the lower stem connector (key 27) and the locknut (key 28) to

the previously marked position and tighten to a torque of 48 NSm (35 lbfSft) for 10mm stems or 175 NSm (129
lbfSft) for 14mm stems.

D For HT constructions see figure 12. With the valve plug/stem (key 3) on the lower seat, thread the stem

extension (key 106) and the locknut (key 108) to the previously marked position and tighten to a torque of 48
N•m (35 lbf•ft) for the 10mm stems or 175 N•m (129 lbf•ft) for 14mm stems.

26. Stroke the actuator rod until it contacts the lower stem connector (key 27) or stem extension (key 106, figure 12)

and install the stem connector halves and travel indicator (keys 23, 24, and 26) with the cap screws (key 25). Install

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Instruction Manual

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GX 3-Way Valve and Actuator

July 2017

the stem connector halves in the proper orientation so that when looking at the inside of the stem connector
halves, the flats are down and the beveled surfaces are up.

27. Align the pointer of the travel indicator (key 26) with the appropriate mark on the travel scale.

28. Tighten the stem connector cap screws (key 25) to 35 N•m (26 lbf•ft).

29. Tighten the packing follower (key 29) to the torque specified in table 4.

Alternately, the packing follower can be tightened by the following method:

a. Tighten the packing follower until the Belleville springs are compressed 100% (or completely flat), as detected by

a rapid increase in nut torque.

b. Loosen the packing follower 60_ of rotation.

30. Ensure that the electric actuator maximum thrust output does not exceed the values in table 5.

Table 5. GX 3-Way Electric Actuator Maximum Allowable Thrust

VALVE SIZE

DN25-DN40

(NPS 1 to 1-1/2)

DN50 (NPS 2) 14 19 316L SST 14000 3150

DN80-DN100

(NPS 3 to 4)

STEM DIAMETER TRAVEL

mm mm N lbf

10 19 316L SST 6900 1550

14 38 316L SST 14000 3150

STEM MATERIAL

FOR ACTUATOR TRAVEL UP AND DOWN

MAXIMUM THRUST

Valve Trim Maintenance

Key numbers in this section refer to figures 9 and 10. Reference the flow direction nameplate (figure 5) to determine
side‐port common (unbalanced) or bottom‐port common (balanced) trim style.

Figure 5. Fisher GX 3‐Way Flow Direction Nameplate

GE34806-B

GE34804-B

BOTTOM‐PORT COMMON - DIVERGING

SIDE‐PORT COMMON - DIVERGING

GE34807-B

BOTTOM‐PORT COMMON - CONVERGING

GE34805-B

SIDE‐PORT COMMON - CONVERGING

Side‐Port Common and Bottom‐Port Common Trim Disassembly

1. Remove the actuator and bonnet assembly as described in the Replacing Packing section (steps 1 through 10).

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GX 3-Way Valve and Actuator

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D103312X012

CAUTION

Use care to avoid damaging the gasket sealing surfaces.
The surface finish of the valve stem (key 3) is critical for making a good packing seal. The seating surfaces of the seat ring or

cage (key 2) and the valve plug (key 3) are critical for tight shutoff and should therefore also be treated with care and
properly protected.

1. Packing parts can be removed from the bonnet if desired. Replace these parts as described in the section on Packing

Maintenance.

2. Use a seat ring or cage tool made according to the dimensions in figure 6 and table 6 to remove the seat ring or

cage (key 2) as follows:

a. Insert the tool into the valve body. Be certain the tool lugs are engaged in the corresponding recesses in the seat

ring or cage.

b. Use care to avoid damaging or scratching the bonnet and cage guide surfaces (see figures 9 and 10).

c. Use a torque gun or driver having sufficient torque capabilities according to table 7. Connect the gun to a socket

that snugly fits the hex head on the seat ring or cage tool.

d. Insert the socket onto the hex head of the seat ring or cage tool.

WARNING

Be careful to hold the torque gun, attached socket, and tool at right angles to the seat ring or cage when applying torque.
Tilting the gun and socket while applying torque may cause the lugs on the seat ring or cage tool to suddenly disengage
from the lugs on the seat ring or cage thus causing possible damage to the seat ring or cage and possible personal injury.

3. Remove the seat ring or cage (key 2) from the valve body.

4. Inspect parts for wear or damage that would prevent proper operation of the valve.

Side‐Port Common Trim Assembly

Refer to figure 9.

1. Before installing the new seat ring, thoroughly clean the threads in the valve body. Apply suitable lubricant to the

threads and to the radius surface of the seat ring (key 2). Screw the seat ring into the valve body. Using the seat ring
tool, tighten the seat ring and torque according to the values in table 7. Remove all excess lubricant after
tightening.

2. Clean the body/yoke gasket surfaces and install a new body/yoke gasket (key 5).

3. Remove any protective tape or covering from the valve plug/stem assembly.

4. Insert the plug/stem assembly into the seat ring.

5. Install a new bonnet O‐ring (key 81) in the groove on the bonnet (see figure 9). Apply a general purpose

silicone‐based lubricant.

D For HT constructions, see figure 12. Install a new graphite seal ring (key 107) in the groove on the bonnet. Apply

a general purpose silicone lubricant.

CAUTION

If the packing is to be reused and was not removed from the bonnet, perform the following step carefully to avoid
damaging the packing with the stem threads.

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GX 3-Way Valve and Actuator

July 2017

6. Install bonnet, and actuator yoke onto the valve body by completing the assembly according to steps 14 to 27 of

the section Replacing Packing, omitting step 17 if new packing is not being installed.

Bottom Port Common Trim Assembly

1. Once the seal ring (key 37) is removed, the elastomeric backup ring (key 38) can be pried from the groove.

2. To install a new backup ring (key 38) and seal ring (key 37) into the cage (key 2), apply a general purpose

silicone‐based lubricant. Slide the backup ring into the cage and into the groove. Slide the seal ring from the top
into the cage over the backup ring.

3. Install a new cage O‐ring (key 81) in the outer groove on the cage (see figure 10). Apply a general purpose

silicone‐based lubricant.

4. Before installing a new cage, thoroughly clean the threads in the valve body. Apply a suitable lubricant to the

threads and to the radius surface of the cage (key 2). Screw the cage into the valve body. Using the cage tool,
tighten the cage and torque according to the values in table 7. Remove all excess lubricant after tightening.

Figure 6. Seat Ring or Cage Removal and Installation Tool

A

B

E

D

GE02918‐6

F

C

C

Table 6. Seat Ring or Cage Driver Dimensions

Valve Size A B C D E

DN NPS mm

Side‐Port Common

25 1 36 20 2X 13.2 7.5 100 53
40 1‐1/2 46 28 2X 13.2 7.5 105 63
50 2 60 36 2X 15.2 8.5 121.5 93
80 3 70 44 2X 17.2 9.5 169 113

100 4 70 44 2X 17.2 9.5 169 113

Bottom‐Port Common

25 1 36 20 2X 13.2 7.5 58 53
40 1‐1/2 46 28 2X 13.2 7.5 63 63
50 2 60 36 2X 15.2 8.5 80 93
80 3 70 44 2X 17.2 9.5 105 113

100 4 70 44 2X 17.2 9.5 105 113

FO

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Table 7. Seat Ring and Cage Torque Requirements

VALVE SIZE TORQUE

DN NPS NSm lbfSft

25 1 320 234

40 1‐1/2 460 337

50 2 1020 747

80 and 100 3 and 4 1520 1113

5. Clean the body/yoke gasket surfaces and install a new body/yoke gasket (key 5).

6. Remove any protective tape or covering from the valve plug/stem assembly.

CAUTION

Be careful when inserting the plug/stem assembly into the cage. Lower the plug into the cage slowly as this will seat the
seal ring to the plug. Make sure the seal ring (key 37) or backup ring (key 38) does not become disengaged from the cage
groove.

7. To insert the plug/stem assembly (key 3) into the cage (key 2), apply a general purpose silicone‐based lubricant.

Slowly insert the plug/stem assembly into the cage.

CAUTION

If the packing is to be reused and was not removed from the bonnet, perform the following step carefully to avoid
damaging the packing with the stem threads.

8. Insert the bonnet and actuator yoke onto the valve body by completing the assembly according to steps 14 to 27 of

the section Replacing Packing, omitting step 17 if new packing is not being installed.

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D103312X012

GX 3-Way Valve and Actuator

July 2017

Parts Ordering

Each valve is assigned a serial number which can be found on the valve or on the nameplate (figure 2 and key 35, not
shown). The nameplate will normally be fitted to the actuator. Refer to this serial number when contacting your

Emerson sales office

or Local Business Partner for technical assistance. When ordering replacement parts refer to this

serial number and give the part description 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.

Parts Kits

Packing Kits

PACKING

KITS

Valve Size

Stem Diameter

ENVIRO-SEAL PTFE packing (Contains keys 32 and 33) RGXPACKX012 RGXPACKX022

ENVIRO-SEAL Graphite ULF packing (Contains keys

42, 43, and 44)

DN 25 and 40 (NPS 1 and 1‐1/2)

10 mm

RGXPACKX052 RGXPACKX042

DN 50, 80 and 100 (NPS 2, 3 and 4)

14 mm

Actuator Kits

ACTUATOR

KITS

Actuator (Contains keys 10, 15, 19, 109, and 20) RGX225X0022 RGX750X0032

Actuator Size 225 750

Bottom‐Port Common Seal Kits

DN 25

(NPS 1)

BOTTOM‐PORT

COMMON

SEAL KITS

1. A Gasket Kit is required when replacing the seals.

(1)

Ethylene Propylene (EPDM) (Contains keys 37 and 38) RGX3WAYX022 RGX3WAYX052 RGX3WAYX082 RGX3WAYX112

Nitrile (Contains keys 37 and 38) RGX3WAYX012 RGX3WAYX042 RGX3WAYX072 RGX3WAYX102

FKM Fluorocarbon (Contains keys 37 and 38) RGX3WAYX032 RGX3WAYX062 RGX3WAYX092 RGX3WAYX122

Valve Size

Bonnet and Cage O‐Rings (not used on HT constructions)

Valve Size

BONNET AND

CAGE O‐RINGS

1. The bonnet O‐ring applies to Side‐Port Common trim. The cage O‐ring applies to Bottom‐Port Common trim.

(1)

Ethylene Propylene O‐ring (EPDM) (Contains key 81) GE29466X022 GE29467X022 GE29468X022 GE29469X022

Nitrile O‐ring (Contains key 81) GE29466X012 GE29467X012 GE29468X012 GE29469X012

FKM Fluorocarbon O‐ring (Contains key 81) GE29466X032 GE29467X032 GE29468X032 GE29469X032

DN 25

(NPS 1)

Seal Rings (HT Construction Only)

DN 25

(NPS 1)

SEAL RINGS

Valve Size

Graphite Seal Ring (Contains key 107) GE49062X012 GE49063X012 GE49064X012 GE49065X012

Gasket Kits

GASKET

KITS

Valve Size

Body / Bonnet Gasket Kit

(Graphite Laminate)

(Contains key 5)

DN 25

(NPS 1)

GE00078X012 GE00079X012 GE00080X012 GE00052X012 GE00052X012

DN 40

(NPS 1‐1/2)

(NPS 1‐1/2)

(NPS 1‐1/2)

(NPS 1‐1/2)

DN 50

(NPS 2)

DN 40

DN 40

DN 40

DN 50

(NPS 2)

DN 50

(NPS 2)

DN 50

(NPS 2)

DN 80

(NPS 3)

DN 80 and 100

(NPS 3 and 4)

DN 80 and 100

(NPS 3 and 4)

DN 80 and 100

(NPS 3 and 4)

DN 100
(NPS 4)

19

GX 3-Way Valve and Actuator

July 2017

Parts List

Note

Contact your Emerson sales office
numbers.

Key Description

1 Valve Body 
 2* Seat Ring or Cage
 3* Valve Plug/Stem
 4 Bonnet
 5* Body/Bonnet Gasket, graphite laminate see gasket kits table
 6 Body/Bonnet Bolting
 7 Body/Bonnet Nut
 8 Actuator Yoke
 9 Upper Diaphragm Casing
10* Diaphragm see actuator kits table
11 Diaphragm Plate
12 Actuator Springs
13 Actuator Spacer
14 Cap Screw
15 Washer see actuator kits table
16 Cap Screw, long
17 Cap Screw, short
18 Hex Nut
19* Yoke Bushing see actuator kits table
20* O‐ring see actuator kits table
21 Vent Cap
22 Actuator Rod
23 Stem Connector Nut Half
24 Stem Connector Bolt Half
25 Cap Screw
26 Travel Indicator
27 Lower Stem Connector
28 Hex Nut
29 Packing Nut
30 Packing Spacer
31* Packing Box Ring
32* Anti‐Extrusion Washer see packing kits table
33* ENVIRO-SEAL Packing Set see packing kits table
34 Belleville Spring
35 Nameplate
36 Warning Label

or Local Business Partner for part

Instruction Manual

D103312X012

Key Description

37* Seal Ring see bottom-port common seal kits table
38* Backup Ring see bottom-port common seal kits table
42* ENVIRO-SEAL Packing Set see packing kits table
43* ENVIRO-SEAL Packing Set see packing kits table
44* Packing Washer see packing kits table
53 Handjack Body
54 Handjack Lever
55 Operating Nut
56 Drive Screw
57 Drive Screw Washer
58 Retaining Ring, Extension
59 Thrust Bearing
60 Pin Pivot
61 Bushing
62 Retaining Ring, Extension
63 Lever Spacer
64 Hex Head Cap Screw
66 Hex Head Cap Screw
68 Stud Bolt, Continuous Thread
70 Lubricant, Lithium Grease
71 Lubricant, Anti‐Seize
72 Cap Plug
74 Travel Indicator Scale
75 Lubricant Fitting, Straight
76 Handwheel
77 Hex Nut, Lock
78 Pipe Plug
81* Bonnet / Cage O‐ring see bonnet and cage O-ring table
91 Protection Plate
96 Cap Screw
97 Warning Label
99 Travel Stop Assy
101 Travel Stop Warning Tag
102 Drive Screw
103 Flow Arrow
105 Yoke Extension
106 Stem Extension
107* Graphite Seal Ring see seal ring table
108 Hex Nut
109* O-ring see actuator kits table
110 Rod Adaptor
111 Stud
112 Nut
113 Drive Screw
114 Electric Actuator Spacer
115 Lead Seal and Wire (not shown)

20

*Recommended spare parts

Instruction Manual

D103312X012

Figure 7. Fisher GX 3‐Way Packing

GX 3-Way Valve and Actuator

July 2017

GE37477_PACK

GE37477_ULF

ENVIRO-SEAL PTFE PACKING ENVIRO-SEAL GRAPHITE ULF PACKING

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GX 3-Way Valve and Actuator

July 2017

Instruction Manual

Figure 8. Fisher GX 3‐Way Control Valve and Actuator System Assembly, Fail‐Up, Side‐Port Common

SIDE‐PORT COMMON

AIR SUPPLY
CONNECTION

D103312X012

22

GE35775‐D

BACK SIDE

APPLY LUBRICANT

Instruction Manual

D103312X012

Figure 9. Fisher GX 3‐Way Side Port Common Trim Construction

SIDE‐PORT COMMON

GX 3-Way Valve and Actuator

July 2017

GE37477_SP_TRIM

Figure 10. Fisher GX 3‐Way Bottom‐Port Common Trim Construction

BOTTOM‐PORT COMMON

GE37477_BP_TRIM

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GX 3-Way Valve and Actuator

July 2017

Instruction Manual

D103312X012

Figure 11. Fisher GX 3‐Way Control Valve and Actuator System Assembly, Fail‐Down, Bottom‐Port Common

BOTTOM‐PORT COMMON

AIR SUPPLY
CONNECTION

24

GE35776‐d

APPLY LUBRICANT

BACK SIDE

Instruction Manual

D103312X012

GX 3-Way Valve and Actuator

Figure 12. Fisher GX 3‐Way High-Temperature Control Valve and Actuator System Assembly, Fail‐Up,
Side‐Port Common

SIDE‐PORT COMMON

AIR SUPPLY
CONNECTION

July 2017

GE49204‐C

BACK SIDE

APPLY LUBRICANT

25

GX 3-Way Valve and Actuator

July 2017

Figure 13. Fisher GX 3‐Way Electric Actuator Mounting

Instruction Manual

D103312X012

26

GG12175-A

Instruction Manual

D103312X012

GX 3-Way Valve and Actuator

July 2017

27

GX 3-Way Valve and Actuator

July 2017

Instruction Manual

D103312X012

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, FIELDVUE, and ENVIRO-SEAL 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

28

E 2008, 2017 Fisher Controls International LLC. All rights reserved.