Dyna-Flo DFR 026 Parts list manual

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-DFR1M0918A 1
Operation, Parts, and Instruction Manual
TABLE OF CONTENTS
General 2 Actuator Assembly 14
Scope 2 Bushing Installation 14
Principles of Operation 2 Mounting Yoke / Hub Assembly 14
Safety Caution 2 Spring / Adjuster / Seat Assembly 15
Specifications 3 Diaphragm Rod / Plate Assembly 15
Approximate Actuator Weights - Table 1 3 Lever Assembly & Installation 16
Unpacking 4 Diaphragm Casing Assembly 17
Installation 4 Access Plate Installation 17
Air Piping 4 Principles of Handwheel Operation 18
Actuator Mounting 5 Handwheel Maintenance 18
Spring Adjustment 7 O-Ring Replacement 18
Initial Set 7 Actuator Cross Section - Figure 26 20
Stroke Range 8 Mounting Bolt Torques - Table 3 21
Changing Actuator Style 8 DFR Torque Specifications - Table 4 21
Mounting Styles & Positions - Table 2 9 Parts 22
Mounting Orientations - Figure 10 10 Model Builder 24
Actuator Disassembly 11
Valve Removal 11
Casing Disassembly 11
Diaphragm Plate / Rod Removal / Disassembly 12
Spring / Adjuster / Seat Disassembly 13
Mounting Yoke / Hub Removal 13
Bushing Inspection / Removal 14
Figure 1 DFR 026
and 571 Control Valve

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model DFR 026 Rotary Actuator
P-DFR1M0918A 2
Operation, Parts, and Instruction Manual
NOTICE These instructions are meant to be used with the Dyna-Flo DFR Technical Sales Bulletin as they refer to
Figures and Tables therein. If you do not have the Technical Sales Bulletin, contact Dyna-Flo immediately,
or visit www.dynaflo.com.
Each control valve is factory checked. Check the calibration for the specific application, before a valve
or actuator is put into service.
It is the intention of this document to provide users with an accurate guide for safe installation and
maintenance of the DFR Actuator. Revisions and updates are available at above mentioned website.
GENERAL
The following instructions are to be thoroughly reviewed and understood prior to installing, operating or performing
maintenance on this equipment. Work on this equipment should be performed by experienced personnel. Throughout
the manual, safety and caution notes appear and must be strictly followed to prevent serious injury or equipment
malfunction.
SCOPE
The actuator configuration and construction materials were selected to meet particular pressure, temperature, operating medium,
and process fluid conditions. Some material combinations are limited in their pressure and temperature ranges. Do not apply any
other conditions to the actuator without first contacting your Dyna-Flo sales office.
This manual is written to be a practical and useful guide for maintaining the Dyna-Flo DFR Actuator.
SAFETY CAUTION
Only well trained experienced technicians should perform these procedures. Use safe work practices and lock out
procedures when isolating valves and actuators. It is also important to wear the proper protective equipment when
performing any installation or maintenance activity. Use only parts and materials rated for the process being used,
operating conditions, and environmental conditions products will be used in.
To avoid personal injury or installation damage as a result of the sudden release of process pressure or damage to
equipment, do not install the actuator assembly where service conditions could exceed the limits stated in this manual,
sales bulletin or on the equipment nameplates. Use government codes, accepted industry standards and good piping
practices, and select proper pressure-relieving equipment for protection of your installation. Always be aware of
flammable process and instrument gas.
Always be aware of the hazards of actuators, especially spring-loaded actuators. Be sure that the actuator is
de-energized or in the failed position before performing any maintenance procedure.
These actuators have dangerous pinch points. Never put your hands inside the valve or actuator unless you are certain
that the valve or actuator will not suddenly move.
PRINCIPLES OF OPERATION (For Top-Mounted Handwheel refer to Page 18)
The DFR actuator works by loading pressure on the top side of the diaphragm (Key 23), this loading pressure moves the diaphragm
rod (Key 16) downwards. As the loading pressure is decreased, the spring (Key 14) forces the diaphragm rod upwards.
The spring and diaphragm have been selected to meet a specific application requirement, and while in service the actuator should
produce full travel of the valve with the diaphragm pressure indicated on the nameplate (Key 33).
If there is no positioner being used with the control valve, a loading device (such as a 4-way switching valve) must be used. Loading
devices do not come equipped standard with the actuator. Refer to appropriate positioner instruction manual as required.

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-DFR1M0918A 3
Operation, Parts, and Instruction Manual
Table 1
Approximate Actuator Weights - lb. (Kg)
Actuator Size Standard Assembly With Top Mounted Handwheel
026 30 (14) 41 (19)
SPECIFICATIONS
Material Temperature Capabilities
Standard: -40 to 180 oF (-40 to 82 oC).
Construction Materials
See Parts list for construction materials.
Contact your Dyna-Flo sales office for more information and
other options.
Valve Shaft Compatibility, inches (mm)
Size 026: 1/2 (12.7) & 5/8”x1/2”
Actuator Dimensions
Refer to Figures 3 & 4 of Sales Bulletin.
Refer to Tables 2, 3, & 4 of Sales Bulletin.
Output Torque
Refer to Tables 5 & 6 of Sales Bulletin.
Actuator Mounting Orientation And Valve Applications
Refer to Figure 10.
Refer to Table 2.
Standard Tubing Connection Size
1/4 inch NPT.
Maximum Shaft Rotation
90 degrees.
Shaft Connection Types
The standard shaft connection is a splined shaft suitable for a
Dyna-Flo 570 control valve.
Options
•Manual override
•Reduced rotation output
•Increased tubing connection size
•Travel stops
Diaphragm Casing Volume
Refer to Table 7 of Sales Bulletin.
For more information and other options contact your Dyna-Flo
sales office.
Actuator Size Active Diaphragm
Area in2(cm2)Maximum Casing
Pressure Psig (kPa)
026 27 (174) 60 (414)

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 4
Operation, Parts, and Instruction Manual
UNPACKING VALVE FROM SHIPPING
CONTAINER
Special Tools Required:
• Properly Rated Lifting Straps (2 – 4 Straps) See Table 1 for
actuator weights.
• Lifting Device (Example: Crane)
Check the packing list, verify that the list includes all the
materials in the shipping container before unpacking. Valve
information can be found on the nameplate (Key 33). Refer to
Figure 3 for nameplate location.
When lifting the valve from shipping container, place properly
rated lifting straps around the neck of the actuator (See Figure
2) to lift the valve/actuator assembly. Straps should be placed
to avoid damage to tubing and other mounted accessories.
INSTALLATION
Before You Begin:
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Sudden movement of actuator can cause damage or injury.
It helps to have the actuator de-energized as long as the
valve installation will permit.
• Use safe work practices and lock out procedures before
placing valve in-line.
Actuators are typically shipped from factory as an assembly
already mounted to the valve. Follow the appropriate valve
installation instructions to install the actuator / valve assembly.
If the actuator was shipped separately, it will be necessary to
mount the actuator on the valve prior to installation, refer to
the Actuator Mounting section.
Operating medium must be controlled and directed, if a
positioner was not ordered or unavailable, use a loading
device such as a 4-way switching valve (not provided with the
actuator). For more information on positioner installation and
operation, refer to the appropriate positioner instruction
manual for your positioner type.
AIR PIPING
WARNING:
Property damage, environmental harm, and personal injury
can result from the use of supply gas other than clean,
non-corrosive, oil and moisture free air. Do not exceed the
supply pressure indicated on the nameplate (Key 33)
located on the actuator.
Before You Begin:
Note: Standard actuators accept 1/4” (6 mm) NPT connections.
Piping Installation Steps:
1Use 3/8” (10 mm) outside diameter SST tubing
(or equivalent) for air lines. Keep length of tubing as short
as possible to prevent transmission lag in the control
signal.
2Install the required line vents, valves, drains, seals, and
filters to the actuator.
Figure 2 Actuator Lifting Suggestions
LIFTING STRAP

Model DFR 026 Rotary Actuator
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P-DFR1M0918A 5
Operation, Parts, and Instruction Manual
ACTUATOR MOUNTING
Before You Begin:
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Use safe work practices and lock out procedures.
• Disconnect supply lines (air or gas), electric power, or control
signal to the actuator. Sudden movement of actuator can
cause damage or injury, make sure actuator will not operate.
• Vent any pneumatic actuator loading pressure.
• Relieve process pressure and drain the process fluid from up
and down stream of valve.
• Be aware of potentially hazardous process material that may
be present in-line and in-valve. Isolate the valve from
process pressure. Use a bypass or block valve if necessary,
or completely shut off the process. Relieve internal valve
pressure (refer to the appropriate valve instruction manual).
Lubricants Required:
• Fluid Film®(Key D)
1If the valve has been removed from the pipeline, secure
the valve assembly in place on a flat work surface
that will support the weight of the combined valve and
actuator assembly.
2Remove any positioners and/or instrumentation installed
on the actuator.
3Remove the access plate (Key 27) by removing the screws
(Key 28).
4Before placing the valve shaft (Key V) into the lever (Key
19), position the valve ball/disc as follows:
For push-down-to-close action (fail open):
Rotate the valve ball/disc into the fully open position.
For push-down-to-open action (fail closed):
Rotate the valve ball/disc into the fully closed position.
Note: Refer to the appropriate valve instruction manual.
5Loosen the lever clamp (Keys 19A & 19B). Refer to Figure 26.
6Apply Fluid Film®(Key E) to the teeth of the valve shaft
(Key V).
7Position the hub (Key 5) and travel indicator (Key 6) in
the desired position. Note: It may be necessary to pull the
valve shaft (Key V) back out of the hub after installation
should the hub and travel indicator sit in an undesired
position once the shaft is installed. Figure 3 Actuator Mounting
28
27
33
6
V
ALIGN THE MARK
ON THE VALVE
SHAFT (KEY V)
WITH THE MARK
ON THE LEVER
(KEY 19).
D
3TURN THE HUB
(KEY 5) TO
ALIGN THE
TRAVEL
INDICATOR
(KEY 6) WITH
THE DESIRED
ORIENTATION
ON THE
TRAVEL SCALE
(KEY 8).
THE POSITION OF THE VALVE BALL/DISC
SHOULD MATCH THE POSITION OF THE TRAVEL
INDICATOR (KEY 6).
8

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 6
Operation, Parts, and Instruction Manual
Figure 4 Actuator/Valve Body Bolting
ACTUATOR MOUNTING (Continued)
8Slide the actuator onto the valve shaft as shown in Figure
3. Refer to Figures 10 for actuator mounting positions and
orientations.
Note: The actuator is typically installed in a vertical
orientation. Should the actuator be installed in a horizontal
position, then it may be necessary to have external support
for the actuator in this position.
9Once the actuator is installed on the valve shaft in the
proper orientation, secure the actuator in place using the
mounting bolts (Key 30), lockwashers (Key 31), and hex
nuts (Key 32). Refer to Figure 4, and Table 3 for torque
values.
10 Center the lever (Key 19) and secure it by tightening the
lever clamp cap screw (Key 19A) and jam nut (Key 19B).
11 Loosen the jam nut (Key 21) on the up travel stop. Adjust
the up travel stop (Key 20) so that the valve ball/disc is
in the fully open or closed position as required. Lock the
travel stop in place by re-tightening the jam nut. Refer to
Figure 6. Figure 5 Mounting Adjustment for Push-Down-To-Open
30
3231
OPERATING PRESSURE
SUPPLY LINE -
WITH MAXIMUM
OPERATING
PRESSURE
APPLIED
TO ACTUATOR.
UP STOP
(KEYS 20
& 21)
6
VALVE BALL
NOT 100%
CLOSED.
VALVE BALL
100% CLOSED
TRAVEL INDICATOR (KEY 6)
SHOWS VALVE IS PROPERLY
CLOSED
UP STOP
ADJUSTED
TO CLOSE
VALVE

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
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P-DFR1M0918A 7
Operation, Parts, and Instruction Manual
ACTUATOR MOUNTING (Continued)
12 Slowly stroke the actuator until the maximum operating
pressure is reached as indicated on the nameplate (Key
33). Note: Use caution when stroking the actuator, avoid
dangerous pinch points and equipment damage by keeping
appendages and tools away from moving actuator parts.
13 With the maximum operating pressure applied to the
actuator, loosen the jam nut (Key 21) and adjust
the down travel stop (Key 20, Figure 5) until the valve
ball/disc is in the fully closed or open position as required.
Lock the travel stop in place by re-tightening the jam nut.
14 Relieve the operating pressure from the actuator casing.
15 Perform the SPRING ADJUSTMENT - Initial Set.
Figure 7 Access Plate Removal
• Vent any pneumatic actuator loading pressure.
• Relieve process pressure and drain the process fluid from up
and down stream of valve.
• Be aware of potentially hazardous process material that may
be present in-line and in-valve. Isolate the valve from
process pressure. Use a bypass or block valve if necessary,
or completely shut off the process. Relieve internal valve
pressure (refer to the appropriate valve instruction manual).
Special Tools Required:
• Flat-head screwdriver or flat-bladed tool.
INITIAL SET
Refer to the actuator nameplate (Key 33) for the Initial Set.
The initial setting is the casing pressure at which the diaphragm
(Key 23) begins to move the diaphragm plate (Key 17) and
diaphragm rod (Key 16) away from the up travel stop.
The initial setting was selected to meet a specific set of service
condition requirements. Proper initial setting will ensure that
once the actuator and valve are in service, the valve will seat
properly and full travel will be achieved within the specified
diaphragm casing pressure range.
Note: If the actuator has been disassembled and reassembled,
or if service requirements have changed, it will be necessary
to perform the following steps for Initial Setting. Refer to the
Actuator Mounting section (Page 5) before proceeding with the
spring adjustment.
Figure 6 Mounting Adjustment for Push-Down-To-Close
SPRING ADJUSTMENT
Before You Begin:
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Use safe work practices and lock out procedures.
• Disconnect supply lines (air or gas), electric power, or control
signal to the actuator. Sudden movement of actuator can
cause damage or injury, make sure actuator will not operate.
28
12
27
ADJUST DOWN STOP
(KEY 20 & 21)
TRAVEL
INDICATOR
(KEY 6)
SHOULD POINT
TO OPEN
19
32
31
30

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 8
Operation, Parts, and Instruction Manual
Figure 8 Spring Adjustment
SPRING ADJUSTMENT (Continued)
INITIAL SET (Continued)
1When performing spring adjustment on the DFR 026, it will
be necessary to have a valve shaft (Key V) inserted into
the actuator and to approximately pre-adjust the up travel
stop to its desired position. Note: Travel error will occur if
this step is not followed.
2Disconnect any instrumentation attached to the actuator.
3Remove the screws (Key 28) and the access plate (Key 27).
4Apply operating pressure to the diaphragm casing, when
the spring is properly adjusted, the diaphragm rod (Key
16) will start to move when the Initial Set pressure
(indicated on the nameplate (Key 33) or in Table 5) is
reached. Make note whether the diaphragm rod started to
move before or after the Initial Set value.
5Relieve actuator casing pressure.
6Using a flat-head screwdriver or a flat-bladed tool,
adjust the spring adjuster (Key 12) accordingly:
• To increase Initial Setting (increase spring compression)
– Turn the spring adjuster to the left (clockwise when
viewed from above).
• To decrease Initial Setting (decrease spring compression)
– Turn the spring adjuster to the right (counter-
clockwise when viewed from above).
7Repeat Steps 4 – 6 until the Initial Set pressure is reached.
8Re-install the access plate (Key 27) and screws (Key 28).
9Check the position of the travel indicator (Key 6), adjust if
necessary.
STROKE RANGE
Should the desired stroking range be unachievable during
normal operating conditions with the casing pressure used,
it may be possible to adjust the stroking range by making a
spring adjustment. A spring adjustment will shift the casing
pressure span and either increase or decrease the casing
pressure at which the actuator begins its stroke, this will
affect the pressure at which the actuator reaches full travel.
Refer to the Initial Set section and adjust the spring adjuster
(Key 12) as follows:
To shift the casing pressure span downward – rotate the
spring adjuster to the right (counter-clockwise when viewed
from above).
To shift the casing pressure span upward – rotate the
spring adjuster to the left (clockwise when viewed from above).
CHANGING ACTUATOR STYLE
Refer to the Before You Begin section of the Actuator Mounting
instructions (Page 5).
Mounting Styles A and D
Style A is right-hand mounted and Style D is left-hand
mounted, in all other ways Styles A and Dare identical.
Refer to Figure 10.
Mounting Styles B and C
Style B is right-hand mounted and Style C is left-hand
mounted, in all other ways Styles B and Care identical.
Refer to Figure 10.
Note: To convert a Style A or Dinto a Style B or Cactuator,
the actuator must first be separated from the control valve.
Refer to Steps 1-4 of the Disassembly Section and 1-2 of Valve
Removal Section (Page 11).
Refer to Figure 9.
1Remove the machine screws (Key 10) and travel scale/hub
assembly (Keys 5, 6, 7, 8, & 9).
2Remove the cap screws (Key 4) and mounting yoke (Key
3).
TURNING THE SPRING
ADJUSTER (KEY 12)
COUNTER-CLOCKWISE
(TO THE RIGHT) WILL
DECREASE THE INITIAL
SETTING.
TURNING THE SPRING
ADJUSTER (KEY 12)
CLOCKWISE (TO THE
LEFT) WILL INCREASE
THE INITIAL SETTING.

Model DFR 026 Rotary Actuator
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P-DFR1M0918A 9
Operation, Parts, and Instruction Manual
Table 2
Model DFR Mounting Styles and Positions
Mounting Action Model 570 Series Valves Model 660 Butterfly Valve
Right Hand Fail Open Style A Style B
Right Hand Fail Close Style B Style A
Left Hand Fail Open Style C Style C
Left Hand Fail Close Style D Style D
Figure 9 Changing Actuator Style
CHANGING ACTUATOR STYLE (Continued)
3Swap the position of the travel scale/hub assembly (Keys 5, 6, 7, 8, & 9) and mounting yoke (Key 3) as shown in
Figure 9. Install the travel scale/hub assembly on the opposite side of the actuator using the machine screws (Key 10).
4Place the mounting yoke (Key 3) in the desired orientation (refer to Table 2 and Figure 10 for Mounting Positions) on the
opposite side of the actuator. Secure the mounting yoke in place using the cap screws (Key 4), tighten the cap screws to the
torque specification listed in Table 4.
5Once an actuator has been converted to a different mounting style, the actuator must be re-adjusted. Refer to the Spring
Adjustment section of this manual.
STYLE B / CSTYLE A / D TO
4
3
10
5
9
8
10
65
1
8
7

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 10
Operation, Parts, and Instruction Manual
Flow Flow
Left Hand Mount
Right Hand Mount
STYLE A STYLE B STYLE D STYLE C
POSITION 1 POSITION 1 POSITION 1 POSITION 1
RIGHT-HAND MOUNTING LEFT-HAND MOUNTING
A
B
C
D
Figure 10 Mounting Orientation and Valve Applications

Model DFR 026 Rotary Actuator
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P-DFR1M0918A 11
Operation, Parts, and Instruction Manual
ACTUATOR DISASSEMBLY
Before You Begin:
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Use safe work practices and lock out procedures.
• Disconnect supply lines (air or gas), electric power, or control
signal to the actuator. Sudden movement of actuator can
cause damage or injury, make sure actuator will not operate.
• Vent any pneumatic actuator loading pressure.
• Relieve process pressure and drain the process fluid from up
and down stream of valve.
• Be aware of potentially hazardous process material that may
be present in-line and in-valve. Isolate the valve from
process pressure. Use a bypass or block valve if necessary,
or completely shut off the process. Relieve internal valve
pressure (refer to the appropriate valve instruction manual).
Special Tools Required:
• Soft tip felt marker.
• Flat-head screwdriver or flat-bladed tool.
• Split-ring pliers.
1If the actuator has been removed from the valve or the
actuator/valve assembly has been removed from the
pipeline, secure either assembly in place on a flat work
surface that will support the weight.
2Remove any instruments installed on the actuator.
3Observe the position of the travel indicator (Key 6). Using
a soft tip felt marker, mark the position of the travel
indicator on the travel scale (Key 8).
4Relieve all operating pressure and/or rotate the handwheel
counterclockwise to remove spring tension if a handwheel
is installed. For Handwheel Maintenance refer to Page 18.
VALVE REMOVAL
For complete actuator disassembly, it will be necessary to
separate the actuator from the control valve in order to remove
the lever (Key 19). If maintenance is being performed on the
diaphragm (Key 23) or handwheel, separating the actuator
from the valve will not be necessary.
1Remove the mounting hex nuts (Key 32), lockwashers (Key
31), and mounting bolts (Key 30).
2Separate the actuator from the valve and slide the actuator
off of the valve shaft (Key V).
CASING DISASSEMBLY
1For maintenance purposes: To replace the diaphragm
(Key 23), it will not be necessary to remove spring tension
when removing the upper casing (Key 24), the up travel
stop will hold the spring in place. Proceed to Step 4.
For complete actuator disassembly: Proceed as follows.
2Remove the screws (Key 28) and the access plate (Key
27). Refer to Figure 7.
3Using a flat-head screw driver or flat-bladed tool, remove
all spring tension by turning the spring adjuster (Key 12)
counter-clockwise (to the right) as shown in Figure 8.
4Remove the casing cap screws (Key 25) and hex nuts
(Key 26).
5Remove the upper casing (Key 24) and diaphragm (Key
23).
6Inspect all parts for damage or wear, replace or repair
parts as necessary. All soft parts such as diaphragm should
be replaced.
Figure 11 Valve Removal
30
31
32
V
3

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 12
Operation, Parts, and Instruction Manual
Figure 12 Diaphragm Casing Disassembly
ACTUATOR DISASSEMBLY (Continued)
DIAPHRAGM PLATE/ROD REMOVAL/DISASSEMBLY
1Remove the cap screw (Key 22) from the diaphragm rod
(Key 16) and lever (Key 19).
2Remove the lever (Key 19) from inside the actuator
housing (Key 1).
3Remove the diaphragm plate assembly (Keys 15, 16, 17, &
18) from the actuator housing (Key 1).
5Using a 5/16” socket bit, remove the socket head cap
screw (Key 18) from the diaphragm rod (Key 16) and
separate the diaphragm plate (Key 17) from the
diaphragm rod.
6If necessary, unscrew the rod end bearing (Key 15) from
the diaphragm rod (Key 16).
7Inspect and repair or replace parts as necessary.
Figure 13 Diaphragm Plate Assembly Removal
25
24
23
17
26
1
3
22 15
19
20
21
18
16
17
1
22
19 20 21
13
12
3
14

Model DFR 026 Rotary Actuator
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P-DFR1M0918A 13
Operation, Parts, and Instruction Manual
ACTUATOR DISASSEMBLY (Continued)
SPRING / ADJUSTER / SEAT DISASSEMBLY
1Remove the spring (Key 14) from the actuator housing
(Key 1).
2Remove the spring seat (Key 13) and spring adjuster (Key
12). Separate the spring seat from the spring adjuster if
necessary.
3Remove the thrust washer (Key 11).
4 Inspect all parts for damage or wear, replace or repair
parts as necessary.
MOUNTING YOKE / HUB REMOVAL
1Remove the cap screws (Key 4) and mounting yoke (Key
3).
2Remove the machine screws (Key 10) and slide the hub/
travel scale assembly (Keys 5, 6, 7, 8, & 9) out of
the actuator housing (Key 1).
Figure 14 Diaphragm/Rod Plate Disassembly
Figure 15 Spring / Adjuster / Seat Removal
3Using split-ring pliers, remove the retaining ring (Key 9)
from the hub (Key 5). Slide the travel scale (Key 8) off
the hub.
4Remove the machine screws (Key 7) from the hub (Key
5) and remove the travel indicator (Key 6).
BUSHING INSPECTION / REMOVAL
1Inspect the bushings (Key 2) in the actuator housing (Key
1).
2If the bushings look worn or damaged and need to be
replaced, carefully press the bushings out of the housing
from the inside pushing out.
18
17
16
15
14
13
12
11
1
3

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Model DFR 026 Rotary Actuator
P-DFR1M0918A 14
Operation, Parts, and Instruction Manual
Figure 16 Mounting Yoke Removal
Figure 17 Hub Removal
ACTUATOR ASSEMBLY
Before You Begin:
• The Assembly section of this manual assumes that the
actuator has been completely disassembled prior to
assembly.
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Use safe work practices and lock out procedures.
Special Tools Required:
• Flat-head screwdriver or flat-bladed tool.
• Regulated air supply (to stroke the actuator).
• Vise grips.
• Split-ring pliers.
• 5/16” socket bit.
Lubricants Required:
• Permatex®Nickel Anti-Seize or equivalent (Key A)
• Lubriplate®No. 105 Grease or equivalent (Key C)
• Fluid Film®(Key D)
• Loctite®242®(Key E)
Note: These assembly instructions assume that the control
valve is still installed in the pipeline. If the control valve has
been removed from the pipeline, make sure that the valve is
placed securely on a flat work surface or clamping device that
can support the combined weight of the control valve/actuator
assembly.
BUSHING INSTALLATION
1If the bushings (Key 2) have been removed from the
housing (Key 1) insert new bushings. Bushings may need
to be pressed into place.
MOUNTING YOKE / HUB ASSEMBLY
1Refer to Figure 10 and Table 2, determine the desired
mounting style and orientation. Install the mounting yoke
(Key 3) onto the actuator housing (Key 1) with the cap
screws (Key 4). Refer to Table 4 for cap screw torque
values.
2Install the travel indicator (Key 6) onto the hub (Key 5)
using the machine screws (Key 7).
293
1
2
4
2
9 10
85
6
7
1

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-DFR1M0918A 15
Operation, Parts, and Instruction Manual
Figure 18 Hub Installation
ACTUATOR ASSEMBLY (Continued)
MOUNTING YOKE / HUB ASSEMBLY (Continued)
3Slide the travel scale (Key 8) onto the hub (Key 5) and
secure it in place using the retaining ring (Key 9) and
split-ring pliers.
4Install the hub/travel scale assembly (Keys 5, 6, 7, 8, &
9) onto the actuator housing (Key 1) using the machine
screws. Note: The hub and travel indicator can be rotated
into the proper orientation at any time before the valve
shaft is installed.
SPRING / ADJUSTER / SEAT ASSEMBLY
1Lubricate the thrust washer (Key 11) with Lubriplate®No.
105 Grease (Key C) and install it into the actuator housing
(Key 1).
2Apply Permatex®Nickel Anti-Seize (Key A) to the threads
of the spring adjuster (Key 12). Thread the spring seat
(Key 13)all the way onto the spring adjuster.
3Install the spring adjuster/spring seat assembly (Keys 12 &
13) over top of the thrust washer (Key 11) inside the
actuator housing (Key 1).
4Install the spring (Key 14) onto the spring seat (Key 13)
inside the actuator housing (Key 1).
DIAPHRAGM ROD/PLATE ASSEMBLY
1If the rod end bearing (Key 15) was removed from the
diaphragm rod (Key 16), thread the diaphragm rod back
into the rod end bearing.
2Apply anti-seize compound (Key A) to the threads of the
socket-head cap screw (Key 18).
3Attach the diaphragm plate (Key 17) to the diaphragm
rod (Key 16) using the socket-head cap screw (Key 18)
and a 5/16” socket bit.
4Torque the socket-head cap screw (Key 18) to the value
listed in Table 4.
Figure 19 Spring / Adjuster / Seat Assembly
29
3
4
65
2
9 7
10
8
14
13
A
12
C
11
3
1
8
6

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model DFR 026 Rotary Actuator
P-DFR1M0918A 16
Operation, Parts, and Instruction Manual
ACTUATOR ASSEMBLY (Continued)
LEVER ASSEMBLY AND INSTALLATION
1If the set screws (Key 20) and jam nuts (Key 21) were
removed from the lever (Key 19), re-install them as shown
in Figure 21.
2Place the lever assembly (Keys 19, 20, & 21) inside the
actuator housing (Key 1) as shown in Figure 21.
3Place the diaphragm plate assembly (Keys 15, 16, 17, &
18) into the actuator housing (Key 1). Be aware of the
orientation of the rod end bearing (Key 15), the hole in the
rod end bearing should be in alignment with the hole in the
lever (Key 19). Refer to Figure 22.
4Apply Loctite®242®(Key E) to the threads of the cap
screw (Key 22). Using the cap screw, connect the rod end
bearing (Key 15) to the lever (Key 19). Torque the cap
screw to the torque value listed in Table 4.
Figure 20 Diaphragm Plate/Rod Assembly
Figure 21 Lever Assembly / Installation
Figure 22 Lever Installation
18
A17
16
15
19
20
21
8
6
22
E
15
19
21
20
18
14 17
29
3
1

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-DFR1M0918A 17
Operation, Parts, and Instruction Manual
ACTUATOR ASSEMBLY (Continued)
DIAPHRAGM CASING ASSEMBLY
1Place the diaphragm (Key 23) over the diaphragm plate
(Key 17), align the holes in the diaphragm with the holes in
the actuator housing (Key 1).
2Set the upper diaphragm casing (Key 24) on top of the
actuator housing (Key 1), align the holes. Note: If
a Top-Mounted Handwheel is being used, it is advised that
the position of the stem (Key 103) be adjusted so that the
device will place no downward pressure on the actuator
spring (Key 14).
3Install the cap screws (Key 25) through the diaphragm
casing (Keys 24).
4Install the hex nuts (Key 26) and tighten them evenly in
an alternating crisscross pattern to the torque specification
listed in Table 4.
5Mount the actuator to the valve before performing the
SPRING ADJUSTMENT - Initial Set (Page 7).
ACCESS PLATE INSTALLATION
1 Install the access plate (Key 27) using the machine screws
(Key 28).
Figure 23 Diaphragm Casing Assembly Figure 24 Access Plate Installation
25
24
23
17
26
3
1
19
8
6
28 27
3
1

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model DFR 026 Rotary Actuator
P-DFR1M0918A 18
Operation, Parts, and Instruction Manual
PRINCIPLES OF OPERATION AND
ADJUSTMENT – HANDWHEEL
TOP-MOUNTED HANDWHEEL
DFR Top-Mounted Handwheel assemblies are attached to a
modified upper diaphragm casing (Key 24A) using cap screws
(Key 109). To lock the handwheel in position, tighten the lock
nut (Key 104) into the body (Key 105) of the handwheel.
To compress the spring (Key 14) and move diaphragm
rod (Key 16) down:
Turning the handwheel (Key 102) clockwise into the upper
diaphragm casing (Key 24A) forces the pusher plate
(Key 112) onto the diaphragm (Key 23) and diaphragm
plate (Key 17) to compress the spring.
To decompress the spring (Key 14) and allow diaphragm
rob (Key 16) to move up:
Turning the handwheel (Key 102) counterclockwise away
from the upper diaphragm casing (Key 24A) allows the
actuator spring to decompress which moves the diaphragm
plate (Key 17) and diaphragm rod (Key 16) upward.
Note: If the valve is push-down-to-close, full valve opening can
be restricted by adjusting the handwheel to the desired
position.
If the valve is push-down-to-open, full valve closing can be
restricted by adjusting the handwheel to the desired position.
MAINTENANCE - TOP-MOUNTED
HANDWHEELS
Maintenance should be performed if actuator loading pressure
appears to be leaking from either the handwheel or travel stop.
It is possible that either of the o-rings (Keys 107 & 108) need
to be replaced.
Before disassembling the handwheel or travel stop to replace
o-rings, perform the following steps:
• Lubricate the threads of the stem (Key 103) with white
petroleum grease, stroke the device a couple times after
application.
Figure 25 DFR Top-Mounted Handwheel
MAINTENANCE - TOP-MOUNTED
HANDWHEELS O-RING REPLACEMENT
Before You Begin:
• Read the General and Scope section of this manual (Page 2).
• Read Safety Caution (Page 2).
• Use safe work practices and lock out procedures.
• Disconnect supply lines (air or gas), electric power, or control
signal to the actuator. Sudden movement of actuator can
cause damage or injury, make sure actuator will not operate.
• Vent any pneumatic actuator loading pressure.
• Relieve process pressure and drain the process fluid from up
and down stream of valve.
• Be aware of potentially hazardous process material that may
be present in-line and in-valve. Isolate the valve from
process pressure. Use a bypass or block valve if necessary,
or completely shut off the process. Relieve internal valve
pressure (refer to the appropriate valve instruction manual).
100 101
102
103
104
105
C
107B
108
B
24A
111 109
110113
112

Model DFR 026 Rotary Actuator
Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
P-DFR1M0918A 19
Operation, Parts, and Instruction Manual
Special Tools Required:
• Flat-head screwdriver or flat-bladed tool.
Lubricants Required:
• Dow Corning Molykote®111 or equivalent (Key B)
• Lubriplate®No. 105 Grease or equivalent (Key C)
1Rotate the handwheel counterclockwise and remove any
spring tension applied by the handwheel.
2Relieve any actuator spring (Key 14) compression by
turning the spring adjuster (Key 12) clockwise until it
stops turning. Refer to Step 2 & 3 of the Casing
Disassembly Section.
3Refer to the Actuator Disassembly – Casing Disassembly
Steps 1, 3 & 4 and remove the upper diaphragm casing
(Key 24A).
4Separate the handwheel assembly from the upper
diaphragm casing (Key 24A) by removing the cap screws
(Key 109).
5Loosen the lock nut (Key 104).
6Remove the hex nut (Key 100), flat washer (Key 101), and
handwheel (Key 102).
7Rotate the stem (Key 103) clockwise out of the body (Key
105).
8Remove and replace the o-rings (Keys 107 & 108).
Lubricate the new o-rings with sDow Corning Molykote®
111 (Key B).
9 Re-assemble the handwheel and diaphragm casing. Refer
to the Actuator Assembly section (Page 11).
10 Perform spring adjustment.

Dyna-Flo Control Valve Services Ltd.
Phone: 780 •469 •4000 Toll Free: 1 •866 •396 •2356 Fax: 780 •469 •4035 Website: www.dynaflo.com
Model DFR 026 Rotary Actuator
P-DFR1M0918A 20
Operation, Parts, and Instruction Manual
Figure 26 Actuator Cross Section
24
23
14
16
25
17 18
26
25
1817
1
14
13
12 28
27
21
20
15
11
19
12
22
4
2
19
3
20
2
15
13
11
29
10
5
8
7
6
920
21
21 20
19B
19A
19A
19B
19A
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