Emerson Fisher NS2 Yoke User manual

www.Fisher.com
ATI Piston Actuator with Fisher™NS2 Yoke
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 2.................................
Specifications 2...............................
Educational Services 2.........................
Maximum Pressure Limitations 3..................
Principle of Operation 3.........................
Lifting Guidelines 3.............................
Lifting Valve/Actuator Assembly 4...............
Lifting Valve Only 4............................
Lifting Actuator Only 4.........................
Installation 5..................................
Mounting the Actuator on the Valve 5............
Adjustments 5.................................
Bench Set 5..................................
Installing the Travel Limit Switch Bracket 6........
Operation 6...................................
Maintenance 6.................................
Replacement of the Elastomeric Parts 7...........
Disassembly 7................................
Assembly 8...................................
Troubleshooting 11.............................
Parts Ordering 13...............................
Parts List 13...................................
Figure 1. ATI Actuator Assembly
Introduction
Scope of Manual
This manual provides installation, adjustment, maintenance, and parts list information for the Fisher ATI actuator
(figure 1). Refer to separate instruction manuals for information regarding the control valve and accessories.
Do not install, operate, or maintain an ATI actuator with Fisher NS2 Yoke 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 before proceeding.
Instruction Manual
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ATI Piston Actuator
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Table 1. ATI Piston Actuator Specifications
SPECIFICATION UNITS ACTUATOR SIZE 80A ACTUATOR SIZE 80C
Nominal Effective Piston Area cm22452 3425
Inch2380 531
Acceptable Valve Stem Diameters mm 31.8
Inch 1.25
Maximum Allowable Output Thrust (Spring Force) N 69,162 154,746
lbf 15,549 34,790
Nominal (Maximum) Travel mm 101.6 (114.3)
Inch 4.0 (4.5)
Maximum Casing Pressure for Actuator Sizing bar 5.52
psig 80
Maximum Casing Pressure bar 10.3
psig 150
Temperature Range (FKM Seals) C-29 to 204
F-20 to 400
Table 2. Actuator Mounting Bolt Torque Values
Using Nuclear Grade Anti-Seize Lubricant
ACTUATOR SIZE
ACTUATOR MOUNTING
STUD BOLT TORQUE
NSm ftSlbf
ATI Actuator with
Fisher NS2 80A Yoke 258 190
ATI actuator with
Fisher NS2 80C Yoke(1) 929 685
1. Will require a calibrated torque−wrench up to 1,000 ftSlbf.
Description
The Spring Return Extend (SRE) ATI Actuator with Fisher NS2 Yoke is a reverse-acting, spring-opposed piston actuator
that is used for operation of PV69 DS100 control valve. The Spring Return Retract (SRR) ATI Actuator with Fisher NS2
Yoke is a direct-acting, spring-opposed piston actuator that is used for operation of PV14 DS104 control valve.
The NS2 actuator yoke construction and special yoke-to-bonnet bolting provides a high structural resonant frequency
that is seismically qualified for PV69 AP1000, CAP1000, and CAP1400 nuclear applications, as well as PV14 DS104
CAP1400 nuclear applications.
Specifications
Tables 1 and 2 provide specifications for the ATI Actuator with Fisher NS2 Yoke discussed in this instruction manual. All
torque values given are ±5% unless otherwise specified. See the actuator nameplate for specific information for your
actuator.
Educational Services
Emerson Educational Services
Phone: [phone]
E-mail: [email protected]
emerson.com/mytraining

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Maximum Pressure Limitations
The piston of the ATI actuator is pressure operated. This air pressure provides energy to compress the spring, to stroke
the actuator, and move the piston away from or towards the valve. The following explanations describe the maximum
pressure limits for an actuator. Refer to table 1 for maximum values.
WARNING
To avoid personal injury or parts damage, do not exceed the Maximum Pressures listed in table 1.
Exceeding any of the maximum pressures can result in uncontrolled movement of parts, damage to actuator parts and the
control valve, and loss of control of the process. Use pressure‐limiting or pressure‐relieving devices to prevent casing
pressure from exceeding these limits.
D Maximum Casing Pressure for Actuator Sizing: This is considered the standard full operating pressure. A full stroke
of 4.0 inches of the valve is expected at this pressure. If a full stroke is not achieved, consult the troubleshooting
section of this manual.
D Maximum Casing Pressure: If the Maximum Casing Pressure is exceeded, damage to the actuator might result.
Principle of Operation
The ATI actuator positions the valve plug in response to varying pneumatic loading pressure on the actuator. For the
SRE actuator, the actuator stem moves up as the loading pressure is increased on the bottom of the piston. As the
loading pressure is decreased, the spring forces the actuator stem down. For the SRR actuator, the actuator stem
moves down as the loading pressure is increased on the top of the piston. As the loading pressure is decreased, the
spring forces the actuator stem up.
The piston actuator has been selected to meet the requirement of the application and, in service, the actuator will
produce full travel of the valve with the piston pressure as indicated on the nameplate.
Lifting Guidelines
WARNING
Failure to follow these lifting guidelines and accepted lifting and rigging practices could result in property damage and
personal injury or death.
All lifting and rigging must be completed in accordance with federal/national/provincial, state and local regulations and
applicable lifting and rigging equipment standards. Only personnel trained in proper lifting and rigging practices shall
perform valve/actuator assembly lifting, rigging and installation. Because each lift will be unique, the method of lifting the
valve assembly, the correct location for attaching and lifting the valve assembly, and what the valve assembly will do when
lifted shall be considered for each lift.
Lifting and rigging equipment used to lift, install or remove a valve assembly or component must be properly selected and
sized for the weight and configuration of the valve assembly or component being lifted. The weight of the complete valve
assembly, including attached accessories, must be taken in consideration for this purpose. The lifting and rigging
equipment must be properly maintained and inspected for damage before each use.
If the valve is supplied with an actuator or handwheel, do not use the actuator or handwheel to lift the complete valve
assembly. Lifting lugs attached to the actuator must not be used to lift the complete valve assembly unless clearly marked
as being rated to support the complete valve assembly weight.
Lifting lugs or other lifting equipment attached to the valve or actuator must never be used to lift or support the weight of
attached piping.

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NOTICE
Care must be taken when lifting the valve/actuator assembly to ensure all accessories and tubing are not damaged in the
process. Accessories and tubing may need to be removed prior to lifting to prevent damage and properly reinstalled before
use. Protect valve flange faces, butt weld ends, and other connection surfaces from damage during lifting.
Lifting Valve/Actuator Assembly
To lift the valve assembly, ATI actuator and accessories, the assembly should not be lifted by the actuator alone. It is
also necessary to place lifting slings around the inlet and outlet of the valve body for lifting. Use padding as needed to
protect any painted surfaces. The valve/actuator assembly can be lifted using a hoist capable of leveling the lifting
points.
Lifting Valve Only
For guidance on lifting only the valve, please refer to the instruction manual for the applicable valve.
Lifting Actuator Only
The ATI L264.5SRE80 actuator with accessories may be lifted using the lifting ears located on the upper cartridge. The
load rating for these lifting ears is 28.7 kN (6,400 lbf) and should not be exceeded. A single hoist lift point on the strap
or chain will balance and lift the actuator, keeping it level. Use padding as needed to protect any painted surfaces.
The ATI L224.5SRR80 actuator with accessories may be lifted using appropriately rated hoist rings threaded into the
two 3/4-10 UNC threaded holes provided in the upper head, see figure 2. The load rating for these threaded holes is
10,000 lbf (44.8 kN) combined and should not be exceeded. A single hoist lift point on the strap or chain will balance
and lift the actuator, keeping it level. Use padding as needed to protect any painted surfaces.
Figure 2. Direct-Acting Piston Actuator (SSR) Top View
305
2X.750-10 UNC-2B
1805APART
FOR LIFTING

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Installation
The actuator is normally shipped mounted on the valve body. Follow the applicable EWNS or HPNS valve instruction
manual when installing the control valve in the pipeline. For information on mounting valve accessories, refer to the
appropriate valve accessories instruction manual.
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
WARNING
If the control valve and actuator are installed with the actuator in any position other than vertical, the actuator may not
conform with safety‐related qualifications. Certain nonvertical orientations can cause water to collect in the yoke and
actuator spring areas, eventually causing degradation in product performance.
Note
The ATI actuator with Fisher NS2 yoke is intended to mount directly to the valve bonnet.
Mounting the Actuator on the Valve
NOTICE
The ATI SRE actuator spring load pushes the stem down out of the actuator yoke, and it can contact the valve stem during
actuator mounting. It is possible to damage valve stem threads or bend the valve stem.
It may be necessary to apply a temporary loading pressure to the actuator to move the actuator stem away from the
valve during installation. See the Disassembly section of this manual.
WARNING
When moving the actuator stem with loading pressure applied, exercise caution to keep hands and tools out of the
actuator stem travel path. If the loading pressure is accidentally disconnected, personal injury and property damage may
result if something is caught between the actuator stem and other control valve parts.
Adjustments
Bench Set
The ATI Assembly has a pre-loaded spring; therefore, there is no bench set adjustment.

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Installing the Travel Limit Switch Bracket
Refer to figure 3 when installing the limit switch targets.
1. Apply Loctite®242 (key 185) to hex cap screws (key 147).
2. Attach the proximity switch target mounting bracket (key 148) to the stem connector half (key 103B) using the hex
cap screws (key 147) and washers (key 146).
3. Center the bracket vertically on the stem connector and tighten the hex cap screws, torque to 23 N•m (17 ft•lbf).
4. Adjust the travel scale vertically to align the closed mark on the scale with the pointer on the bracket and tighten
the mounting screws.
WARNING
To avoid personal injury due to the sudden, uncontrolled movement of parts, do not loosen the cap screws (key 103C)
when the stem connector has spring or loading pressure force applied to it.
Operation
In a SRE, an increasing loading pressure causes the actuator stem to move upward, compressing the spring. In the
event of failure of the loading pressure to the piston of the actuator, the actuator stem moves to the extreme
downward position, closing the valve.
In a SRR, an increasing loading pressure causes the actuator stem to move downward, compressing the spring. In the
event of failure of the loading pressure to the piston of the actuator, the actuator stem moves to the extreme upward
position, opening the valve.
The nameplate attached to the top of the piston provides information about the specific construction and operating
range of the actuator.
When the control valve and actuator are installed, the actuator should be checked for correct travel, freedom from
excessive friction, and correct action (air-to-open or air-to-close) to match the controlling instrument. For successful
operation, the actuator stem and valve plug stem must move freely in response to the loading pressure change on the
piston.
Maintenance
It is recommended that the ATI assembly be replaced every 10 years.
All maintenance operations can be performed with the valve in the line.
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.
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, as much as possible, any actuator spring precompression.

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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.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Replacement of Elastomeric Parts
The ATI actuator assembly contains elastomeric parts; however, these parts cannot be repaired or replaced. Instead,
the entire actuator assembly is replaced after the qualified life of 10 years.
Disassembly
ATI Piston Actuator with Fisher NS2 Size 80 Yoke
Key number references are shown in figures 3 and 4.
The ATI/Yoke Piston Actuator Assembly is manufactured as an assembly as shown in figure 3. This assembly should be
replaced every 10 years.
Instructions are given below for removal of the ATI piston actuator assembly. Perform the disassembly only as far as
necessary to accomplish the required maintenance; then, begin reassembly at the appropriate step.
1. Isolate the control valve from the line pressure, release pressure from both sides of the valve, and drain the process
media from both sides of the valve. Shut off all pressure lines to the power actuator, release all pressure from the
actuator. Use lock-out procedures to be sure that the above measures stay in effect while you work on the
equipment.
Note
The piston actuator spring compression is pre-set; therefore, there is not a way to act against the spring before disassembly of the
stem connector assembly (key 103) without the use of controlled air.
2. Remove the limit switches and set aside.
NOTICE
It is advised to remove or protect the limit switches when working around them. Inadvertent contact can cause damage.
3. Remove the tubing or piping up from the solenoid to the piston actuator regulator. Construct a portable regulator
assembly shown in figure 4 and connect it to the piston actuator input (3/4 inch NPT). This will be used during
disassembly and lifting of the actuator assembly in the following steps.
4. Mark a line with a suitable marker just below the locknuts (key 115) on the valve stem. This will help in assembly of
the stem-connector assembly (key 103). Loosen the locknuts (key 115) down away from the stem connector
assembly (key 103).
5. Using the portable regulator assembly, reset the output pressure of the regulator to 0 psig, then open the
three-way valve to the piston actuator and open the isolation ball valve to the plant air.

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6. For the SRE actuator, dial up the regulator output pressure until the stem connector (key 103) just barely begins to
move up. For the SRR actuator, increase the pressure until the plug is seated, then back off on the pressure until the
stem connector (key 103) just barely beings to move up. At this pressure the valve plug is off the main seat and the
compression is relieved from the stem connector assembly (key 103).
7. Prior to disassembly of the stem connector assembly (key 103), make a mark with a suitable marker just above the
stem connector (key 103) on the piston actuator piston rod. This will aid in reassembly to ensure that proper travel
and seat-load is achieved on the main seat.
WARNING
To avoid personal injury due to the sudden, uncontrolled movement of parts, do not loosen the cap screws when the stem
connector (key 103) when spring force is applied without the aid of control air.
8. With controlled air to the casing, loosen the stem connector cap screws (key 103C). Remove the stem connector
nut-half (key 103B) leaving the magnet target assembly (key 148) in place, if possible. Remove the stem connector
bolt half (key 103A) and feedback arm. Carefully follow the positioner disassembly instructions for any feedback
arm used on the stem connector. Set aside.
9. Loosen the yoke-to-bonnet bolting (keys 101 and 102). Remove nuts (key 102) and washers (key 143).
WARNING
Release of air from the actuator will cause movement of the actuator stem, to avoid personal injury and property damage,
keep hands and tools out of the actuator stem travel path.
10. Lift actuator off the valve by following the recommendations in the Lifting Guidelines section. Shutoff control air
and vent air from piston actuator. Reset portable regulator, secure and disconnect air hose.
Assembly
ATI Piston Actuator with Fisher NS2 Size 80 Yoke
The ATI/Yoke Piston Actuator Assembly is manufactured as an assembly as shown in figure 3. This assembly should be
replaced every 10 years.
Instructions are given below for remounting of the ATI piston actuator assembly. Begin assembly at the appropriate
step.
1. Ensure that the locknuts (key 115) are screwed down on the valve stem. If a mark was made from disassembly, use
this as a guide at step 17 of this section.
2. Coat the threads of the actuator mounting studs (key 101) with Nuclear Grade anti-seize lubricant (key 27) up to
the deformed thread. Thread the actuator mounting studs (key 101) into the valve bonnet until the deformed
thread prevents further insertion.
3. Connect the portable regulator assembly to the piston actuator as shown in figure 4.
4. Using the portable regulator assembly, make sure the adjusting screw of the regulator is completely backed out to
ensure that the regulator outlet pressure will be 0 psig when supply pressure is introduced, then open the
three-way valve to the piston actuator. Open the isolation ball valve to supply plant air to the regulator.
5. For SRE actuators, increase the regulator output pressure until the stem connector (key 103) moves all the way up
into the piston actuator (fully retracted) but do not exceed the Maximum Casing Pressure listed in table 1. SRR
actuators will be fully retracted without air.

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6. Lower the ATI Actuator assembly onto the mounting studs (key 101), make sure that the Fisher logo on the yoke is
aligned to the Fisher logo on the valve body.
Note
The following two steps require a calibrated torque wrench up to 1356 N•m (1,000 ft•lbf) for SRE actuators and up to 407 N•m
(300 ft•lbf) for SRR actuators. It is helpful to number the studs (key 101)/nuts (key 102) from 1 to 12 to accurately torque the
studs.
7. Coat the remaining threads of the actuator mounting studs (key 101) and the contact faces of the nuts (key 102)
with Nuclear Grade anti-seize lubricant (key 27). Place the washers (key 143) over the studs (key 101) and thread
the nuts (key 102) onto the studs (key 101) and hand tighten. Torque the actuator mounting nuts (key 102) in a
criss-cross pattern in increments of 25% up to the full actuator mounting bolt torque value listed in table 2.
8. Check the torque of nuts by performing one (1) circular pattern to applicable actuator mounting torque in table 2.
WARNING
Release of air in the actuator will cause sudden movement of the actuator piston. Do not place hands or any body parts
between the valve stem and the piston rod, as this can cause severe injury.
9. To ensure that the valve plug is fully seated, place a flat metal block at least 1 inch thick or use a flat section of the
bolt half (key 103A) on its side on the top of the valve stem between the stem and the piston rod.
10. Using the portable regulator and the air venting valve in figure 4, slowly release air of the piston actuator (SRE) or
increase the regulator output pressure (SRR) to extend the piston and push down on the valve stem to ensure that
the valve plug is seated. Immediately stop when the valve stem ceases movement.
11. Dial the air back up (SRE) or down (SRR) until the piston is fully retracted.
12. Remove the metal block or bolt half used in steps 9 and 10.
13. Using a measuring device next to the piston, slowly extend the piston from the actuator until the piston travels to
4.00-3.95 inches (Do not exceed 4.00 inches). Hold this pressure (piston position) of the actuator for the next steps.
There should be a gap between the piston rod and the valve stem.
NOTICE
Piston travel greater than 4.00 inches will result in lower seating force on the valve plug from reduced spring force.
Piston travel less than 3.95 inches may result in an excessive gap between the piston rod and valve stem, which can result
in less-than-full thread engagement on the valve stem and possible thread damage.
14. Connect the nut half (key 103B) and the bolt half (key 103A) with the cap screws (key 103C) of the stem-connector
to the valve stem and the connector rod, ensuring to align the nut half in the guide notch of the yoke. If there are
marked lines from disassembly on the stem and piston rod, use these as guides. If there are not marks, ensure that
the stem connector (key 103) threads are fully engaged on the valve stem as a minimum. Some threads can be
unused and visible on the piston rod.

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NOTICE
Care should be used when engaging the threads, any cross-threading should be avoided, as this may require replacing the
ATI assembly or the valve stem assembly. If cross-threading has occurred, contact your Emerson sales office for guidance.
Note
To avoid cross-threading, ensure that the bolt half (key 103A) threads are engaged by pressing against the threaded piston rod as
the first step in tightening, then align the nut half (key 103B) to the other side. While holding these together start the cap screws
(key 103C) and tighten evenly.
Manual clamps can be used to assist in holding the stem connector halves together.
The gap between the bolt half (key 103A) and the nut half (key 103B) should be the same on both sides of the threads as the cap
screws (key 103C) are tightened. If there is misalignment visible, or it appears that the threads are not engaged, restart the
previous step to avoid cross-threading.
15. Tighten the cap screws (key 103C) evenly until just finger tight.
16. With the two bottom cap screws (key 103C) tight, remove the top cap screws and attach the feedback bracket to
the stem connector bolt half (key 103A) with the cap screws (key 103C) and retighten. Torque the cap screws
(key 103C) to 176 N•m (130 ft•lbf) in a criss-cross pattern. Carefully follow the positioner assembly instructions for
any feedback arm used on the stem connector.
17. Screw the valve stem locknuts (key 115) up until the upper one contacts the bottom of the stem connector
assembly (key 103). If a mark was made from disassembly, use this as a guide. Tighten until finger tight. Do not
overtighten the locknuts.
18. Attach the travel scale (key 113) to the yoke using the pan head machine screws (key 126). Leave the screws
finger-tight; they will be tightened after adjustment of the travel scale.
19. If not already attached, attached the target assembly per Installing the Travel Limit Switch Targets sections and
align the travel scale.
20. Test the functionality of the limit switches and adjust as necessary. If significant changes to the position of the
magnets appear necessary, then check the piston travel as it is likely that the travel measurement of the piston rod
or thread engagement was not done properly.
21. Release pressure from the casing. Remove the portable regulator assembly.
22. Attach the air tubing provided to connect the solenoid valve to the piston actuator.

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Troubleshooting
Table 3. ATI Actuator Troubleshooting
Problem Possible Solution
Actuator Stroke is less
than full rated travel
Ensure all parts are intact and assembled as specified.
Check for debris or damaged parts that may be jamming actuator.
Ensure stem connector is assembled as specified.
Inspect valve, see EWNS instruction manual (D103551X012) or HPNS instruction manual (D103466X012).
Air leakage
Check for tightness of fittings.
If leakage is from ATI seals, replace ATI assembly.
Ensure stem connector is assembled as specified.
Inspect valve, see EWNS instruction manual (D103551X012) or HPNS instruction manual (D103466X012).
Inspect all air connections for leakage
Other Contact Emerson sales office if more assistance is needed.

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Figure 3. Fisher Size 80 Yoke/ATI Assembly
E1711
Figure 4. Fisher Size 80 Yoke/ATI Disassembly/Assembly Air Connection
E1712
PLANT
AIR IN
BALL VALVE
(ISOLATION)
REGULATOR
THREE-WAY
BALL VALVE
(FOR VENTING)
HOSE

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Parts Ordering
Each actuator has a serial number stamped on the nameplate. Always refer to this serial number when corresponding
with your Emerson sales office regarding replacement parts or technical information.
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson 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 List
Key Description Part Number
27 Nuclear Grade Anti-Seize Lubricant
101 Stud, Mounting see following table
102 Nut, Mounting see following table
103A Stem Connector Bolt Half see following table
103B Stem Connector Nut Half see following table
Key Description Part Number
103C Hex Cap Screw, Stem Connector see following table
113 Travel Scale see following table
115 Hex Nut, Valve Stem see following table
126 Machine Screw, Travel Scale see following table
143 Washer, Mounting Stud see following table
146 Washer, Pointer see following table
147 Shoulder Screw, Pointer see following table
148 Travel Pointer, Bracket see following table
185 Loctite 242 see following table
187 Adapter Switch see following table

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Table 4. ATI Assembly with Fisher NS2 Size 80A and 80C Yoke
ACTUATOR SIZE VALVE SIZE, NPS PART NUMBER
ATI with 80A NS2 Yoke 10x14 GH10437X022
ATI with 80C NS2 Yoke 20x16 GE86793X022
22x16 GE86793X042
Table 5. Keys 101 and 143 Yoke Mounting Studs and Washers
ACTUATOR SIZE VALVE SIZE, NPS QUANTITY STUD SIZE, INCH KEY 101 MOUNTING STUD
PART NUMBER MATERIAL KEY 143 WASHER PART NUMBER
80A 10x14
12
3/4-10x4.50 1N6604X0242
SA 193 B7
1A375738982
80C 20x16 1-1/8-8x5.25 10A7290X102 GA25577X032
22x16
Table 6. Keys 102 Yoke Mounting Nuts
ACTUATOR SIZE VALVE SIZE, NPS QUANTITY STUD SIZE, INCH PART NUMBER MATERIAL
80A 10x14
12
3/4-10 1A3520X1652
SA 192 2H
80C 20x16 1-1/8-8 1A4452X6132
22x16
Table 7. Key 103 Stem Connector Assembly
ACTUATOR SIZE VALVE SIZE, NPS VALVE STEM SIZE, INCH ASSEMBLY PART NUMBER
80A 10x14
1-1/4
GH10675X032
80C 20x16 GG08592X012
22x16
Table 8. Key 113 and 126 Travel Scale and Machine Screw
ACTUATOR SIZE VALVE SIZE, NPS VALVE TRAVEL KEY 113 TRAVEL SCALE
PART NUMBER
KEY 126 MACHINE SCREW
PART NUMBER
Inch
80A 10x14
4 1U372738982
1A3431X0012
80C 20x16 1A3408K0012
22x16
Table 9. Key 115 Hex Nut, Valve Stem
ACTUATOR SIZE VALVE SIZE, NPS PART NUMBER
80A 10x14
0W0735X0022
80C 20x16
22x16
Table 10. Keys 146, 147, 148, and 187 (Pointer Washer, Pointer Hex Cap Screw, Travel Pointer, Adaptor Switch)
ACTUATOR SIZE VALVE SIZE, NPS KEY 146 POINTER
WASHER PART NUMBER
KEY 147 POINTER HEX
CAP SCREW
PART NUMBER
KEY 148/
KEY 208 TRAVEL
POINTER
PART NUMBER
KEY 187 ADAPTOR
SWITCH
PART NUMBER
80A 10x14
1B8659X0042 GE56486X012
GH10671X042
GE56473X012
80C 20x16 GG08595X032
22x16

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Emerson
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
www.Fisher.com
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.
E2017, 2023 Fisher Controls International LLC. All rights reserved.
Fisher is a mark owned by one of the companies in the Emerson business unit of Emerson Electric Co. Emerson and the Emerson logo are trademarks and
service marks of Emerson Electric Co. All other marks are the property of their respective owners.
Neither Emerson, nor any of its affiliated entities assume 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.