Emerson Fisher 2052 User manual

www.Fisher.com
Fisher™2052 Diaphragm Rotary Actuator
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Educational Services 4...........................
Specifications 4...............................
Installation 4..................................
Actuator Mounting 5..........................
Maintenance 7.................................
Replacing Diaphragm 8........................
Replacing Diaphragm Plate,
Diaphragm Rod Assembly, and Spring(s) 9......
Changing Or Replacing Actuator Lever 11.........
Positioner Mounting
(3610, DVC6020, or DVC6200) 12.............
Top‐Mounted Handwheel 12....................
Locking Mechanism 13.........................
Parts Ordering 17...............................
Parts List 17...................................
Figure 1. Fisher Control‐Disk™ Valve with
2052 Actuator and DVC6200 Digital Valve Controller
W9418-2
Introduction
Scope of Manual
This instruction manual includes installation, adjustment, operation, maintenance, and parts information for the
Fisher 2052 diaphragm rotary actuator (figure 1). Instructions for the control valve, positioner, manual actuator, and
other accessories are included in separate manuals.
Do not install, operate, or maintain a 2052 actuator without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson sales office or Local Business Partner before
proceeding.
Description
2052 spring‐and‐diaphragm rotary actuators are used on rotary‐shaft valve bodies for throttling or on‐off applications.
The 2052 may be used for on‐off service without a positioner, or it may be used for throttling service with a positioner,
depending on service conditions. The 2052 has an ISO 5211 mating interface that allows installation to non‐Fisher
valves. Refer to separate bulletins for valve and positioner information.
A top-mounted handwheel option is available for infrequent service as a manual actuator. For repeated or daily manual
operation, the unit should be equipped with a side-mounted declutchable 1078 manual actuator. Externally adjustable
travel stops are used to limit the degree of rotation at both ends of the actuator stroke.
The lever for the 2052 actuator is supported by bushings. The lever may be changed to accommodate valve bodies
with different size valve shafts.
Instruction Manual
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Table 1. Fisher 2052 Actuator Specifications
Specifications
Actuator Mounting Connections Splined shaft connection, ISO 5211 actuator‐to‐bracket connection
Size 1: F07, Size 2: F10, Size 3: F14
Actuator Sizes See table 2
Operating Pressure(1) See table 3
Maximum Diaphragm Casing Pressure Size 1, 2, and 3 Actuators: 5 barg (73 psig)
Pressure Connection See table 5
Torque Output See table 3
Actuator Temperature Capabilities(1) Standard: -45 to 80_C (-50 to 176_F)
Optional: -45 to 100_C (-50 to 212_F)(3) or -60 to 80_C (-76 to 176_F)(4)
Operation Field reversible between PDTC and PDTO; right‐ and left‐hand mounting, any angle of orientation
Approximate Weight
Size 1: 22.2 kg (49 lb)
Size 2: 54.4 kg (120 lb)
Size 3: 113 kg (250 lb)
Controller/Positioners Available DVC2000, DVC6020, DVC6030, DVC6200, 3610J, 3620J, 4190, C1
Adjustable Travel Stops Standard adjustable up and down stops capable of 30 degrees of adjustment per stop.
Accessories Available 846, 646, 2625, and 67C Series, switches, i2P-100, VBL, DXP, GO Switch™
Handwheel Top‐mounted handwheel: Optional on Size 1, 2, and 3 actuators
Declutchable handwheel: Optional on Size 1, 2, and 3 actuators
Operational Lockout(2) Available for customer‐supplied padlock to lock the actuator in the spring‐fail position
1. The pressure/temperature limits in this manual should not be exceeded. The current SIL certification for the 2052 actuator is only relevant for the standard temperature ratings shown.
2. Lockout and declutchable handwheel cannot be used together on size 2 and size 3 actuators.
3. Temperature range only applies when using silicone diaphragm material. Silicone diaphragm is not available with the top-mounted handwheel option.
4. Temperature range requires use of stainless steel bolting for yoke and travel stops. Not available with top-mounted handwheel.
Table 2. Actuator and Shaft Size Availability
SHAFT SIZE ACTUATOR SIZE
mm Inches 1 2 3
12.7 1/2 X
14.3 x 15.9 9/16 x 5/8 X X
15.9 5/8 X X
19.1 3/4 X X X
22.2 7/8 X X
25.4 1 X X
28.6 x 31.8 1-1/8 x 1-1/4 X X
31.8 1-1/4 X X
31.8 x 38.1 1-1/4 x 1-1/2 X
38.1 1-1/2 X
39.7 x 44.5 1-9/16 x 1-3/4 X
44.5 1-3/4 X
50.8 2 X
Table 3. Torque versus Actuator Size
ACTUATOR
SIZE AND
ACTION
OPERATING PRESSURE
2 barg (29 psig)(1) 3 barg (44 psig)(1) 4 barg (58 psig)(1) 4.7 barg (68 psig)(1)
Torque
NSm lbfSin NSm lbfSin NSm lbfSin NSm lbfSin
1 (PDTO)
1 (PDTC)
25.5
25.5
226
226
25.5
36.2
226
320
51.2
51.2
453
453
51.2
72.4
453
641
2 (PDTO)
2 (PDTC)
105
105
930
930
105
175
930
1550
210
210
1860
1860
210
320
1860
2840
3 (PDTO) 327 2890 327 2890 631 5580 631 5580
3 (PDTC) 280 2480 557 4930 584 5170 930 8230
1. Do not interpolate between operating pressures. Consult your Emerson sales office or Local Business Partner for assistance.

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Table 4. Fisher 2052 Actuator Mounting Styles
MOUNTING ACTION(1)
VALVE SERIES OR DESIGN VALVE SERIES OR DESIGN
BALL/PLUG
ROTATION TO
CLOSE
V150, V200 & V300 CV500
V500
DISK/BALL
ROTATION TO
CLOSE
A11, 8510B, 8532,
8560, 8580,
9500, and
Control‐Disk
Valve
Right‐Hand PDTC
PDTO
CCW
CCW
A
B
A
B
CW
CW
B
A
Left‐Hand PDTC
PDTO
CCW
CCW
D
C
D
C
CW
CW
C
D
Left‐Hand
(Optional)(2)
PDTC
PDTO
CW
CW
C
D
NA
NA
NA
NA
NA
NA
1. PDTC—Push‐down‐to‐close, and PDTO—Push‐down‐to‐open.
2. A left hand mounted ball will be required for the NPS 3 through 12 Vee-Ball Series B and the NPS 14 and 16, with or without attenuator.
Figure 2. Fisher 2052 Actuator Mounting Styles
STYLE A
STYLE C STYLE B STYLE D
FLOW
2
3
42
3
4
POSITION 1
STANDARD
POSITION 1
STANDARD
44
33
22
GE37285-B
FLOW
STYLE D SHOWN
LEFT HAND MOUNTING
VALVE
INLET
STYLE B SHOWN
VALVE
INLET
RIGHT HAND MOUNTING
Table 5. Pressure Connections
ACTUATOR
SIZE
PRESSURE CONNECTION
1/4 NPT 1/2 NPT 3/4 NPT G 1/4
1 standard optional not available optional
2 standard optional not available optional
3not available standard optional not available

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Educational Services
For information on available courses for Fisher 2052 actuators, as well as a variety of other products, contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: [phone] or 1-800-338-8158
E-mail: [email protected]
emerson.com/fishervalvetraining
Specifications
Specifications are shown in table 1 for 2052 actuators. Specifications for actuator operation are stamped on a metal
nameplate attached to the actuator.
Table 6. Bolting Torque Requirements(1)
DESCRIPTION KEY NUMBER ACTUATOR
SIZE
TORQUE FASTENER LUBRICATION
NSm LbfSft
Rod End Bearing Clamping Bolt
Torque , Key 16
1
2
3
38
180
400
28
130
295
None
End Plate to Housing Bolt
Torque, Key 4
1
2
3
68
120
210
50
90
155
None
Diaphragm Plate to Rod Bolt
Torque, Key 7
1
2
3
27
115
300
20
85
220
Anti-Seize Lubricant
Casing Bolt Torque, Key 8
1
2
3
55
55
55
40
40
40
None
Housing to Yoke Bolt Torque,
Key 28
1
2
3
27
68
245
20
50
180
None
Lever‐Spline Clamping Bolt
Torque, Key 15
1
2
3
38
115
175
28
85
130
None
Optional Lockout Kit Mounting
Bolt Torque, Key 53
1
2
3
NA
88
340
NA
65
250
None
1. Exceeding any torque requirements could damage the actuator and impair safe operation.
Installation
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations.
Check with your process or safety engineer for any other hazards that may be present from exposure to 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
To avoid parts damage, do not apply pressure that exceeds the Maximum Diaphragm Casing Pressure in table 1.
Use pressure‐limiting or pressure‐relieving devices to prevent the Operating Pressure from exceeding the values shown in
table 3.

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The actuator, as it comes from the factory, is normally mounted on a valve body. If the actuator is shipped separately
or if it is necessary to mount the actuator on the valve, perform the procedures presented in the Actuator Mounting
section. Follow the procedures given in the valve instruction manual when installing the control valve in the pipeline.
If a positioner is ordered with the actuator, the pressure connection to the actuator is normally made at the factory. If
it is necessary to make this connection, run tubing of the appropriate size for the diaphragm casing pressure
connection (reference table 5) between the pressure connection and the instrument. Keep the length of tubing or
pipe as short as possible to avoid transmission lag in the control signal.
When the control valve is completely installed and connected to the controlling instrument, check to make sure that
the action is correct (air‐to‐open or air‐to‐close) and that the controlling instrument is properly configured for the
desired action. For successful operation, the diaphragm rod assembly, lever, and valve shaft must move freely in
response to changes in the loading pressure on the diaphragm.
Actuator Mounting
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.
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 Safely vent the power actuator loading pressure.
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 hazards that may be present from exposure to process media.
Use the following steps to mount the actuator or to change actuator mounting style or position.
Unless otherwise specified, key numbers referenced in the following procedures are shown in figure 7 for the 2052
actuator.
If the Actuator is mounted on a valve body and it is necessary to change mounting style or position, the actuator must
first be separated from the valve body.
1. Isolate the valve body from the process. Release process pressure and vent all actuator pressure.
2. Remove the cover or plug (key 2).
WARNING
To avoid personal injury and equipment damage from moving parts, keep fingers and tools clear while stroking the
actuator with the cover removed.

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3. Loosen the cap screw (key 15).
4. Separate the actuator from the valve body by removing the cap screws and nuts which secure the valve to the
mounting yoke (key 27). Proceed to step 5.
If the actuator is not mounted on a valve body ensure the up and down travel stops (see figure 3) are adjusted
correctly to achieve the desired actuator rotation. Use the travel indicator (key 21) and travel scale (key 19) as
reference.
Note
Once each travel stop is properly positioned, adequately tighten the hex nut (key 24) to lock the travel stop in place.
5. Refer to figure 2 and table 4 for available mounting styles and positions. The actuator is normally positioned
vertically with the valve in a horizontal pipeline.
6. Determine whether the actuator mounting yoke (key 27) will be mounted on the end plate assembly (key 3) side or
on the actuator housing boss side of the actuator. If the desired mounting position and style require moving the
mounting yoke (key 27) and travel indicator components to opposite sides of the actuator, remove the machine
screws (keys 20 and 22), the travel indicator scale (key 19), and the travel indicator (key 21). Remove the cap screws
(key 28) and the mounting yoke (key 27). Install the mounting yoke in the desired position (on the end plate
assembly or on the actuator housing boss). Tighten the mounting cap screws to the torque specified in table 6.
Install the travel indicator components on the opposite side of the actuator.
WARNING
To avoid personal injury or property damage, ensure the travel indicator is installed correctly to coincide with the desired
actuator action. Refer to figure 3 for more information.
Figure 3. Fisher 2052 Actuator Travel Stops and Travel Indication
TRAVEL INDICATOR
SCALE
UP
TRAVEL
STOP
DOWN
TRAVEL
STOP
KEY 22
KEY 20 TRAVEL
INDICATOR
INDICATOR
ORIENTATION
FOR PDTC
INDICATOR
ORIENTATION
FOR PDTO
VIEW A
VIEW A

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7. Before sliding the valve shaft into the lever, position the valve ball or disk as follows:
For push‐down‐to‐close action, the valve ball or disk should be in the fully open position.
For push‐down‐to‐open action, the valve ball or disk should be in the fully closed position (see the valve body
instruction manual).
8. Make sure that the index markings on the valve shaft are properly aligned with either the markings on the lever or
the travel indicator scale mounting holes. Slide the valve shaft into the lever. (See figure 4 for one possible
orientation.) Install the valve mounting cap screws and nuts. Tighten to the torque value given in the appropriate
valve body instruction manual.
9. Ensure all end play in the valve shaft is removed by directing the valve shaft and control element toward the
actuator as much as possible.
10. Tighten the socket head cap screw (key 15) which compresses the splined lever connection to the valve shaft (see
table 6). Install the cover or plug (key 2) into the access hole in the housing.
CAUTION
When adjusting the travel stop for the closed position of the valve ball or disk, refer to the appropriate valve instruction
manual for detailed procedures. Undertravel or overtravel at the closed position may result in poor valve performance
and/or damage to the equipment.
Over-rotation of the lever could result in the diaphragm stroking to the point where the diaphragm seals off against the air
signal connection. This could prevent an air signal from being able to stroke the valve.
11. Adjust the up travel stop (see figure 3) so that the valve ball or disk is in the desired position. When adjusting the
up travel stop, ensure the stop is not backed out too far, causing the lever to over-rotate. Over-rotation of the lever
may cause damage to valve components. Avoid over-rotation by adjusting the up travel stop so that the travel
indicator screws (key 22) align with the travel scale screws (key 20). See figure 3.
12. Stroke the actuator and adjust the down travel stop so that the valve ball or disk is in the desired position.
Note
Once each travel stop is properly positioned, adequately tighten the hex nut (key 24) to lock the travel stop in place.
13. Make sure that the travel indicator pointer matches the ball or disk position. Remove and install in the proper
position if necessary.
14. Refer to the table of contents for accessory installation procedures.
Maintenance
Actuator parts are subject to normal wear and must be inspected and replaced as necessary. The frequency of
inspection and replacement depends upon the severity of service conditions. Instructions are given below for
disassembly and assembly of parts. Key numbers referenced in the following steps are shown in figure 7 for the 2052,
except as listed below or otherwise specified in the procedures.
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.

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D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations.
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 Safely vent the power actuator loading pressure.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any hazards that may be present from exposure to process media.
Replacing Diaphragm
Isolate the valve body from the process. Release process pressure and vent all actuator pressure.
Disassembly
1. Remove the supply tubing or pipe from the top casing assembly (key 5).
WARNING
To avoid personal injury from precompressed spring force suddenly thrusting parts away from the actuator, spring
compression must first be relieved. Closely follow the instructions below.
Figure 4. Orientation of the Fisher 2052 Actuator Lever into the Housing and Aligning the Actuator to the Valve Shaft
Markings
UP TRAVEL STOP
2. Loosen, but do not remove, all casing cap screws and hex nuts (keys 8 and 9). Ensure there is no spring force to the
top casing assembly (key 5). If spring force is detected against the top casing assembly, ensure the up travel stop
cap screw (key 23) is adjusted correctly to prevent over-rotation of the lever (key 14). Refer to figure 3. The travel
indicator screws (key 22) in the end of the lever should be in alignment with the travel scale screws (key 20). If the
up travel stop is confirmed to be adjusted correctly and force is still detected against the top casing assembly,
contact your local Emerson Automation Solutions Instrument and Valves Service Center. Alternatively, replace two
oppositely located casing cap screws (key 8) with 100 mm (4 inch) long fully threaded M10 cap screws of ISO 898-1

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Property Class 8.8 material or equivalent. Loosen the nuts (key 9) on the two fasteners in an equivalent manner to
relieve spring force.
3. Carefully remove all cap screws and hex nuts (keys 8 and 9) from the top casing assembly. The spring forces are
retained by the diaphragm rod assembly (key 10), allowing quick removal of the pressure retaining components.
4. Remove the top casing assembly and the diaphragm (key 11).
5. Inspect the diaphragm plate (key 6). If the diaphragm plate is damaged or if further disassembly of the actuator is
required, proceed to the Replacing Diaphragm Plate, Diaphragm Rod Assembly, and Spring(s) procedure.
6. Inspect the diaphragm and replace if necessary.
Assembly
1. Place the diaphragm (key 11) on the diaphragm plate (key 6), making certain that it is properly centered.
2. Observe the correct position of the loading connection fitting and install the top casing assembly (key 5). Replace
the cap screws and nuts (keys 8 and 9) which secure the top casing assembly to the actuator housing. Tighten the
nuts in an alternating fashion (see table 6).
3. Install the inlet piping to the top casing assembly.
Replacing Diaphragm Plate, Diaphragm Rod Assembly, and Spring(s)
Isolate the valve body from the process. Release process pressure and vent all actuator pressure.
Disassembly
1. Remove the supply tubing or pipe from the top casing assembly (key 5).
WARNING
To avoid personal injury from precompressed spring force suddenly thrusting parts away from the actuator, spring
compression must first be relieved. Closely follow the instructions below.
2. Loosen, but do not remove, all casing cap screws and hex nuts (keys 8 and 9). Ensure there is no spring force to the
top casing assembly (key 5). If spring force is detected against the top casing assembly, ensure the up travel stop
cap screw (key 23) is adjusted correctly to prevent over-rotation of the lever (key 14). Refer to figure 3. The travel
indicator screws (key 22) in the end of the lever should be in alignment with the travel scale screws (key 20). If the
up travel stop is confirmed to be adjusted correctly and force is still detected against the top casing assembly,
contact your local Emerson Instrument and Valves Service Center. Alternatively, replace two oppositely located
casing cap screws (key 8) with 100 mm (4 inch) long fully threaded M10 cap screws of ISO 898-1 Property Class 8.8
material or equivalent. Loosen the nuts (key 9) on the two fasteners in an equivalent manner to relieve spring force.
3. Carefully remove all cap screws and hex nuts (keys 8 and 9) from the top casing assembly. The spring forces are
retained by the diaphragm rod assembly (key 10), allowing quick removal of the pressure retaining components.
4. Remove the top casing assembly and the diaphragm (key 11).
5. Inspect the diaphragm plate (key 6).
a. To relieve spring compression, using a hex wrench, unscrew and remove the socket head cap screw (key 7) which
secures the diaphragm plate (key 6) to the diaphragm rod assembly (key 10). Remove the diaphragm plate.
6. Remove the spring (key 13) or springs (keys 12 and 13).

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7. The guide assembly (key 48) may be removed for inspection (size 3 only).
Note
At this stage of disassembly, it may be determined that further disassembly is not necessary. If separation of the diaphragm rod
assembly from the lever is not warranted, proceed to the Assembly portion within this section of the procedure.
8. To gain access to the cap screw (key 16) which secures the diaphragm rod assembly to the lever, the end plate
assembly (key 3) must be removed. Before the end plate assembly can be removed, one of the following
procedures must be performed. Proceed as appropriate:
D For actuators with valve bodies mounted on the end plate assembly (key 3) side of the actuator, the actuator must
be separated from the valve body. Perform steps 1 through 4 of the Actuator Mounting section, remove the
mounting yoke (key 27), and then return to step 9 of this section.
D For actuators with valve bodies mounted on the actuator housing boss side of the actuator [opposite of the
endplate (key 3)], remove the travel indicator pointer (key 21). Proceed to step 9.
9. Remove the socket head cap screws (key 4) and the end plate assembly (key 3).
10. Remove the cap screw (key 16) and nut (key 17) if applicable (size 3 only), that secures the actuator lever (key 14)
to the diaphragm rod assembly (key 10). Remove the diaphragm rod assembly.
11. Inspect all parts and replace if necessary.
12. If total disassembly of the actuator is required, or if the actuator will be assembled for use with a valve body with a
different valve shaft diameter, proceed to the Changing or Replacing Actuator Lever procedure.
Assembly
1. Fasten the diaphragm rod assembly (key 10) to the lever using the cap screw (key 16) and nut (key 17) if applicable.
Tighten per table 6.
2. Install the housing end plate (key 3).
3. Adjust the travel stop bolts to the correct position so that the travel indicator screws (key 22) align with the travel
scale screws (key 20). See figure 3.
4. Install the guide assembly (key 48 - size 3 only).
5. Install the spring(s). The outer (larger diameter) spring is standard for the single spring size 1 & 2 constructions. The
inner spring is standard for the single spring size 3 construction.
6. Place the diaphragm plate (key 6) onto the spring(s). It is important that the springs be properly seated in their
respective counterbores on the bottom side of the plate. If necessary, push or pull the diaphragm plate toward
center to ensure the springs are engaged into their respective seats.
7. Lubricate the socket head capscrew (key 7) and tighten per table 6.
8. Place the diaphragm (key 11) on the diaphragm plate (key 6), making certain that it is properly centered.
9. Observe the correct position of the loading connection fitting and install the top casing assembly (key 5). Replace
the cap screws and nuts (keys 8 and 9) which secure the top casing assembly to the actuator housing. Tighten the
nuts in an alternating fashion (see table 6).
10. Install the inlet piping to the top casing assembly.
11. Install the travel indicator (key 19) if removed.
12. If the actuator was removed from the valve body, refer to the appropriate section in the Actuator Mounting
procedure and proceed as applicable.

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Changing or Replacing Actuator Lever
WARNING
Avoid personal injury or property damage. The end plate assembly (key 3) and lever (key 14) may only be removed after the
actuator spring compression forces are safely relieved. Refer to the instructions below.
Disassembly
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.
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 Safely vent the power actuator loading pressure.
D Use lock‐out procedures to be sure that the above measures stay in effect while you work on the equipment.
D Check with your process or safety engineer for any other hazards that may be present from exposure to process media.
1. Isolate the valve body from the process. Release process pressure and vent all actuator pressure.
2. Remove the cover or plug (key 2).
WARNING
To avoid personal injury and equipment damage from moving parts, keep fingers and tools clear while stroking the
actuator with the cover removed.
3. Loosen the cap screw (key 15).
4. Follow steps 2 through 10 in the Replacing Diaphragm Plate, Diaphragm Rod Assembly, and Spring(s) section.
5. Remove and inspect the lever (key 14). If the lever is worn or damaged, or if the actuator will be mounted to a valve
body requiring a different size lever, replace the lever.
6. Inspect the bushings located in the end plate (key 3) and housing (key 1) assemblies. If bushings are excessively
worn or damaged, remove them with a press. Press in new bushings so that they are flush with the exterior surfaces
of the actuator housing and the end plate assembly.
Assembly
1. Refer to figure 4 for the correct orientation of the lever during assembly.
2. If a cam‐operated positioner is used, install the cam to the lever with the parts provided by the appropriate
instrument mounting kit. Be sure to observe the orientation shown in figure 4 and follow all procedures given in the
positioner instruction manual.
3. Insert the lever into the bushing in the actuator housing.
4. Fasten the rod end bearing diaphragm rod assembly to the lever using the cap screw (key 16) and nut (key 17) if
applicable. Tighten per table 6.

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5. Install the end plate assembly (key 3).
6. Adjust the travel stop bolts to the correct position so that the travel indicator screws (key 22) align with the travel
scale screws (key 20). See figure 3.
7. Install the guide assembly (key 48) size 3 only.
8. Install the spring(s). The outer (larger diameter) spring is standard for the single spring size 1 & 2 constructions. The
inner spring is standard for the single spring size 3 construction.
9. Place the diaphragm plate (key 6) onto the spring(s). It is important that the springs be properly seated in their
respective counterbores on the bottom side of the plate. If necessary, push or pull the diaphragm plate toward
center to ensure the springs are engaged into their respective seats.
10. Lubricate the socket head capscrew (key 7) and tighten per table 6.
11. Place the diaphragm (key 11) on the diaphragm plate (key 6), making certain it is properly centered.
12. Observe the correct position of the loading connection fitting and install the top casing assembly (key 5). Replace
the cap screws and nuts (keys 8 and 9) which secure the top casing assembly to the actuator housing. Tighten the
nuts in an alternating fashion (see table 6).
13. Install the inlet piping to the top casing assembly.
14. Refer to the Actuator Mounting procedure and proceed as applicable.
Positioner Mounting (3610, DVC6020, or DVC6200)
1. Before installing the positioner, the positioner cam must be installed on the lever.
2. Refer to assembly step 2 in the previous section on Changing or Replacing Actuator Lever.
3. Refer to the positioner instruction manual for setup and calibration procedures.
Top‐Mounted Handwheel (Size 1 and 2)
Key numbers used in this procedure are shown in figure 9 except where indicated.
The optional top‐mounted handwheel can be used as a manual actuator for intermittent service. It is not to be used as
an adjustable travel stop. This is built into the housing.
The handwheel assembly is welded to a special top casing assembly (key 5, figure 9). A hex nut (key 43) locks the
handwheel in position. For field installation of a handwheel, the special upper diaphragm casing is supplied with the
handwheel.
Turning the handwheel (key 32) clockwise into the upper casing forces the pusher plate (key 36) against the
diaphragm and diaphragm plate (keys 11 and 6, figure 7) to compress the inner and outer springs (keys 12 and 13,
figure 7) and move the diaphragm rod assembly downward. Turning the handwheel counter‐clockwise allows the
actuator spring(s) to move the diaphragm rod assembly upward.
CAUTION
Damage to the handwheel screw can occur if the handwheel is over-rotated in the counter-clockwise direction. The
handwheel should not continue to be rotated once the actuator reaches the up stop and resistance to turning the
handwheel significantly drops.
Instructions are given below for complete disassembly and assembly required for inspection and parts replacement.

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Disassembly
WARNING
To avoid personal injury from the precompressed spring force thrusting the upper diaphragm casing away from the
actuator, fully turn the handwheel counterclockwise.
1. Perform steps 1 through 6 of the Replacing Diaphragm procedure.
2. Remove the cotter pin, hex nut, handwheel, and locknut (keys 34, 33, 32, and 43). Unscrew the stem (key 35) out
through the actuator end of the handwheel body (key 5).
3. Check the condition of the O‐ring (key 44); replace if necessary.
4. If it is necessary to remove the pusher plate or spacer (key 36 or 42), drive out the groove pin (key 37).
Assembly
1. Before assembling, lubricate the thread of the stem (key 35) with anti‐seize lubricant. Lubricate the bearing
surfaces of the stem and rounded end with lithium grease.
2. If the pusher plate or spacer was removed, attach them to the stem and drive in a new groove pin (key 37).
3. With the O‐ring (key 44) in place, thread the stem into the handwheel assembly.
4. Install the locknut, handwheel, hex nut, and cotter pin (keys 43, 32, 33, and 34).
Note
Be sure to install the handwheel so that the arrow of operation on the top side coincides with the action of the actuator, as stated
on the nameplate. (The arrow should point clockwise for PDTO. The arrow should point counter-clockwise for PDTC.)
5. Install the top casing assembly, making certain the warning tag is in place on the casing flange.
Locking Mechanism
Refer to figures 5 or 6 for the appropriate size locking mechanism when installing or planning to operate the device.
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.
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 Safely vent the power actuator loading pressure.
D Check with your process or safety engineer for any hazards that may be present from exposure to process media.

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Installing the Size 1 Locking Mechanism
To add the locking mechanism (figure 5) to an existing actuator, purchase the required kit from Emerson Automation
Solutions.
1. Ensure the diaphragm rod assembly (key 10) is in the upward position and the lever (key 14) is against the up travel
stop (spring fail position).
2. Thread the supplied jam nut (key 40) all the way onto the threaded bolt portion of the mounting plate assembly.
3. Loosen the down travel stop hex nut (key 24) and remove the travel stop cap screw (key 23).
4. Remove the vent screen (key 47) from the threaded hole in the bottom of the actuator housing.
5. Secure the locking plate (key 39) to the bottom of the housing assembly by reinstalling the down travel stop (key
23) and hex nut (key 24). Ensure the clearance hole in the locking plate is aligned with the threaded hole in the
bottom of the housing.
6. Ensure the down travel stop is adjusted correctly to achieve the desired actuator rotational output.
7. Install the mounting plate assembly (key 38) by inserting it through the clearance hole in the locking plate and
threading it into the hole in the actuator housing.
GE51941_A
Figure 5. Size 1 Locking Mechanism
LOCKING PLATE
(KEY 39)
MOUNTING PLATE ASSEMBLY
(KEY 38)
JAM NUT
(KEY 40)
CUSTOMER-SUPPLIED
LOCKING DEVICE
Operating the Locking Mechanism (Size 1)
To Lock the Actuator
1. Screw the mounting plate assembly into the housing until it contacts the actuator lever.
2. Align the hole in the locking plate (key 39) with one of the holes in the disk of the mounting plate assembly.
3. Tighten the jam nut (key 40) against the locking plate.

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4. Insert a padlock (not furnished by Emerson Automation Solutions) to prevent the mounting plate assembly from
rotating.
To Unlock the Actuator
1. Remove the padlock. Loosen the jam nut (key 40), and unscrew the threaded bolt until it no longer protrudes inside
the housing.
Note
Ensure the mounting plate assembly bolt is unthreaded far enough that the actuator lever will not contact the bolt during normal
actuator operation.
2. If the mounting plate assembly is to be left partially threaded into the housing, lock it with the jam nut (key 40) so
that it cannot be screwed further into the housing and interfere with normal actuator operation.
Figure 6. Size 2 and 3 Locking Mechanism
PART ORIENTATION FOR SIZE 3 END-MOUNT INSTRUMENT
CUSTOMER SUPPLIED
LOCKING DEVICE SIZE 3

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Installing the Size 2 and 3 Locking Mechanism
To add the locking mechanism (figure 6) to an existing actuator, purchase the required kit from Emerson Automation
Solutions.
1. The actuator should be mounted to the valve body and both travel stops (key 23) properly positioned prior to
installing the locking mechanism.
2. Ensure the actuator lever (key 14) is in the spring-fail position (against the up travel stop).
3. Assemble the lockout kit by positioning the locking shaft (key 50) within the center through-hole of the mounting
plate (key 51), as shown in figure 6. Insert the locking pin (key 52) through the center pinhole of the mounting plate
and through the pin hole in the locking shaft. Install the hairpin cotter pin (key 54) for retention.
4. If installing the lockout kit on an existing actuator, remove the travel indicator (key 21) and travel indicator scale
(key 19) from the actuator by loosening the appropriate screws.
5. Position the lockout kit against the actuator outboard end. The locking shaft will insert and engage the lever end
geometry.
Size 2 actuator: The standard size 2 lockout kit orientation shown in figure 6 will accommodate the use of
window-mount and end-mount digital valve controllers, positioners, and accessories. This orientation requires
removal of the locking pin in the direction of the bottom side of the actuator.
Size 3 actuator: For the window mounted DVC6200 digital valve controller, the size 3 lockout kit should be oriented
such that locking pin removal is in the direction of the bottom side of the actuator. This mounting plate position
provides necessary clearance with the integral supply pressure regulator. For the end-mount digital valve controller or
accessory option, the size 3 lockout kit should be oriented as shown in the inset picture of figure 6.
6. Loosely install the four flanged cap screws (key 53). Prior to tightening the fasteners, ensure the through-hole in the
mounting plate is centered around the outside diameter of the locking shaft (key 50). Rotate the assembly by hand
in the appropriate direction opposite of anticipated lever rotation to eliminate initial clearance among parts.
7. Tighten the cap screws (key 53) per the recommended torque values in table 6.
8. Install the travel indicator (key 21) and travel indicator scale (key 19) to the lockout parts as illustrated in figure 6.
WARNING
To avoid personal injury or property damage, ensure the travel indicator is installed correctly to coincide with the desired
actuator action. Refer to figure 3 for more information.
9. For normal actuator operation, remove the hairpin cotter pin (key 54) and locking pin (key 52) from the center
pinhole of the mounting plate and reinstall these parts in the second pinhole for storage.
Operating the Locking Mechanism (Size 2 & 3)
To Lock the Actuator
1. With the actuator lever (key 14) against the up travel stop (spring-fail position), insert the locking pin (key 52)
through the center pinhole of the mounting plate and through the pin hole in the locking shaft. Install the hairpin
cotter pin (key 54) for retention.
2. Install the customer-supplied locking device to further prevent removal of the locking pin.
To Unlock the Actuator
1. Remove the customer-supplied locking device.
2. Remove the hairpin cotter pin (key 54) and locking pin (key 52) from the center pinhole of the mounting plate and
reinstall these parts in the second pinhole for storage.

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WARNING
To avoid personal injury or property damage, be aware the travel indicator scale (key 19) retains the locking shaft (key 50)
during normal actuator operation. Removal of the travel indicator scale could allow the locking shaft to fall out in certain
actuator orientations.
Parts Ordering
When corresponding with your Emerson sales office or Local Business Partner about this equipment, refer to the serial
number found on the actuator nameplate.
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 List
Note
Contact your Emerson sales office or Local Business Partner for Part
Ordering information.
Key Description
1 Housing Assembly
1a* Bushing
2 Cover or Plug
3 End Plate Assembly
3a* Bushing
4 Cap Screw
5 Top Casing Assembly
6 Diaphragm Plate
7 Cap Screw
8 Cap Screw
9 Hex Nut
10 Diaphragm Rod Assembly
11* Diaphragm
Molded nitrile/nylon
Standard Construction
Molded silicone/polyester
Standard Construction
12 Spring, Inner
13 Spring, Outer
14 Lever
15 Cap Screw
16 Cap Screw
Key Description
17 Hex Nut
18 Insert
19 Travel Indicator Scale
20 Self Tapping Screw
21 Travel Indicator
22 Machine Screw
23 Cap Screw
24 Hex Nut
25 Cover Plate
26 Cap Screw
27 Mounting Yoke
28 Cap Screw
29 Label
30 Nameplate
31 Drive Screw
32 Handwheel
33 Slotted Hex Nut
34 Cotter Pin
35 Screw
36 Pusher Assembly
37 Groove Pin
41 Warning Label
42 Washer
43 Hex Nut
44* O‐Ring
45 Lubricant
46 Lubricant
47 Vent Screen
48* Guide Assembly
49 Lockout Kit
Kits for Actuator Locking Mechanisms are available to keep the actuator in a locked position, the same as spring-fail,
during maintenance. (Padlock is customer supplied). Not compatible with the declutchable handwheel on size 2 and 3
actuators.
Kits
Description Part Number
Size 1 GE51941X012
Size 2 GE52968X012
Size 3 GE52968X022
*Recommended spare parts

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Figure 7. Fisher 2052 Actuator Assembly
GE42779-C
APPLY LUB/SEALANT
PARTS NOT SHOWN: 2, 18
SIZE 3 ONLY
SIZE 3 ONLY

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Figure 8. Fisher 2052 Size 3 Actuator Assembly
GE52013-A
APPLY LUB/SEALANT
SIZE 3 ONLY

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Figure 9. Fisher 2052 Size 1 Handwheel Assembly
GE33241_A
APPLY LUBRICANT
Emerson Automation Solutions
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.
E2009, 2017 Fisher Controls International LLC. All rights reserved.
Fisher, Control-Disk, and GO Switch 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.
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of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.