www.Fisher.com
D100320X012
Types 1051 and 1052 Sizes 40, 60 and 70
Styles H and J Rotary Actuators
Contents
Introduction 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 3. . . . . . . . . . . . . . . . . . . . . . . . .
Description 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 4. . . . . . . . . . . . . . . . . . . . .
Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Mounting 4. . . . . . . . . . . . . . . . . . . . . . . .
Loading Connections 11. . . . . . . . . . . . . . . . . . . . .
Adjustment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Type 1051 and 1052 Turnbuckle Adjustment 11
Type 1052 Spring Adjustment 12. . . . . . . . . . . . .
Initial Compression 12. . . . . . . . . . . . . . . . . . . . .
Stroking Range 13. . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing Actuator Mounting 18. . . . . . . . . . . . . . .
Changing Styles 18. . . . . . . . . . . . . . . . . . . . . . . . .
Changing Positions 19. . . . . . . . . . . . . . . . . . . . . .
Top-Mounted Handwheels and
Adjustable Travel Stops 21. . . . . . . . . . . . . . . . .
Handwheel and Travel Stop Operations 21. . . .
Handwheel and Travel Stop Maintenance 22. . .
For Top-Mounted Handwheels and Adjustable
Up Travel Stops 22. . . . . . . . . . . . . . . . . . . . . . .
For Adjustable Down Travel Stops 23. . . . . . . . .
Parts Ordering 23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note
Neither Emerson, Emerson Process
Management, nor any of their affiliated
entities assumes responsibility for the
selection, use and maintenance of any
product. Responsibility for the
selection, use, and maintenance of any
product remains with the purchaser
and end-user.
Figure 1. Type 1051 Actuator with H Mounting Adaptation
and Type 3610J Positioner
Figure 2. Type 1052 Actuator with J Mounting Adaptation
W4252 / IL
W4139-1 / IL
Instruction Manual
Form 5587
November 2006
1051 & 1052 H & J
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
2
Table 1. Type 1051 and 1052 Actuator Specifications
Operation
Direct Acting: Increasing loading pressure
extends the diaphragm rod out of the spring barrel
Service:
Type 1051: For on-off or throttling service with
positioner
Type 1052: For on-off or throttling service with or
without a positioner
Actuator Sizes
Type 1051: 40, and 60
Type 1052: 40, 60, and 70
Maximum Diaphragm Sizing Pressure
(2)(3)
Size 40: 4.5 bar (65 psig)
Size 60: 2.8 bar (40 psig)
Size 70: 3.8 bar (55 psig)
Maximum Diaphragm Casing Pressure
(2)(3)
Size 40: 5.2 bar (75 psig)
Size 60: 3.4 bar (50 psig)
Size 70: 4.5 bar (65 psig)
Maximum Valve Shaft Rotation
90, 75, or 60 deg with optional stops
Torque Limits (mm)
(4)
Limited by maximum diaphragm sizing pressure
or tables 2 and 3, whichever is less
Stroking Time
Dependent on actuator size, rotation, spring rate,
initial spring compression, and supply pressure. If
stroking time is critical, consult your Emerson
Process Managementt sales office
Material Temperature Capabilities
(3)
Nitrile Diaphragm or O-Rings
(1)
: –40 to 82_C
(–40 to 180_F)
Silicone Diaphragm: –40 to 149_C (–40 to
300_F)
Travel Indication
Graduated disc and pointer combination located
on actuator end of valve shaft
Pressure Connections
1/4 in. NPT female
Mounting Positions
See figure 10
Approximate Weights
See table 7
Additional Specifications
For casing pressure ranges and for material
identification of the parts, see the Parts List
1. Nitrile O-rings are used in optional top-mounted handwheel, adjustable down travel stop, and adjustable up travel stop assemblies.
2. Use this value to determine the maximum torque output allowed.
3. The pressure / temperature limits in this manual and any applicable standard or code limitation for valve should not be exceeded.
4. Exceeding any torque requirements could damage the actuator and impair safe operation.
Table 2. Output Shaft Diameters and Torque Limits for Actuators With H Mounting
ACTUATOR SIZE
OUTPUT SHAFT DIAMETER
TORQUE LIMIT FOR
H MOUNTING
ACTUATOR SIZE
mm Inches
NDm
Inch-Pounds
40
22.2
28.6
38.1
7/8
1-1/8
1-1/2
240
468
1110
2120
4140
9815
60
28.6
38.1
1-1/8
1-1/2
468
1210
4140
10,680
70
(1)
38.1 1-1/2 1210 10,680
1. Type 1052 actuator only.
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
3
Table 3. Acceptable Shaft Diameters and Torque Limits for Actuators With J Mounting
ACTUATOR SIZE
COUPLING AVAILABILITY BY KEYED SHAFT
DIAMETER
TORQUE LIMIT FOR J MOUNTING
ACTUATOR SIZE
mm Inches
NDm
Inch-Pounds
40
9.5
12.7
15.9
19.1
25.4
3/8
1/2
5/8
3/4
1
52
69
114
207
468
460
610
1010
1830
4140
60
19.1
25.4
31.8
38.1
50.8
3/4
1
1-1/4
1-1/2
2
207
468
1030
1360
2650
1830
4140
9110
12,000
23,430
70
(1)
31.8
38.1
50.8
1-1/4
1-1/2
2
(2)
1030
1360
2650
9110
12,000
23,430
1. Type 1052 actuator only.
2. Coupling supplied for mating with either 44.5 or 50.8 mm (1-3/4 or 2-inch) keyed shaft.
Introduction
Scope of Manual
This manual provides installation, adjustment,
operation, maintenance, and parts ordering
information for the Type 1051 (sizes 40 and 60) and
Type 1052 (sizes 40, 60, and 70) diaphragm rotary
actuators with H and J mounting adaptations (see
figures 1 and 2). Also, this instruction manual
provides information for the optional top-mounted
handwheel, and both the optional up and down
travel stops. Instructions for the control valve body,
the positioner, accessories, and other sizes or
constructions of this actuator are covered in
separate manuals.
Do not install, operate, or maintain a Type 1051 or
1052 actuator without first D being fully trained and
qualified in valve, actuator, and accessory
installation, operation, and maintenance, and D
carefully reading and understanding the contents of
this manual. If you have any questions about these
instructions, contact your Emerson Process
Management sales office before proceeding.
Description
The Type 1051 and 1052 diaphragm rotary actuators
are pneumatic spring-return actuators for use with
rotary-control valves and other equipment. The Type
1051 actuator can be used for on-off service, or it
can be used for throttling service when equipped
with a valve positioner. The Type 1052 actuator can
be used for on-off service, or it can be used for
throttling service when equipped with or without a
valve positioner. The Type 1052 actuator spring is
adjustable.
The H mounting adaptation permits the actuator to
be used with equipment other than Fisherr valve
bodies. The mounting brackets and couplings for
rotary actuation are user-provided. This mounting
adaptation includes a flat-surface mounting plate
that is drilled and tapped for attaching the
user-provided bracket. Cap screws for attaching the
bracket are provided. H mounting also includes an
output shaft (with milled flats) to provide the Double
D rotary output either directly or through a
user-provided coupling. Output shaft diameters and
torque limits are listed in table 2. Dimensional
information for the mounting plate and output shaft
are shown in figures 4, 5, and 6.
The J mounting adaptation permits the actuator to
be used for rotary actuation of Fisher keyed-shaft
butterfly valve bodies and other keyed-shaft
equipment. This mounting adaptation uses the
standard butterfly valve mounting bracket and
provides an output shaft with an attached coupling
for keyed equipment shafts. Coupling sizes and
torque limits are listed in table 3. Dimensional
information for the mounting bracket and stub shaft
coupling is shown in figures 4, 5, and 7.
Additionally, a top-mounted handwheel can be
applied for infrequent service as a manual
handwheel actuator. For more frequent manual
operation, a side-mounted handwheel actuator is
available. Also, an adjustable up travel stop can be
added to limit the actuator stroke in the upward
direction, or an adjustable down travel stop can be
added to limit actuator stroke in the downward
direction.
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
4
Specifications
Specifications are shown in table 1 for Type 1051
and 1052 actuators. Specifications for a given Type
1051 or 1052 actuator as it originally comes from the
factory are stamped on a nameplate attached to the
actuator.
Principle of Operation
The diaphragm rod moves down as loading pressure
is increased on top of the diaphragm. As the loading
pressure is decreased, the spring forces the
diaphragm rod upward.
The spring and diaphragm have been selected to
meet the requirements of the application and, in
service, the actuator should produce full travel of the
valve or other operated equipment with the
diaphragm pressure as indicated on the nameplate.
Consult the separate positioner instruction manual
for actuator principle of operation with positioner.
Installation
WARNING
Always wear protective gloves,
clothing, and eyewear when
performing any maintenance
operations to avoid personal injury.
To avoid personal injury or property
damage caused by bursting of
pressure retaining parts, be certain the
service conditions do not exceed the
limits given in table 1. Use pressure
limiting or pressure relieving devices
to prevent the diaphragm sizing
pressure from exceeding the maximum
allowable diaphragm sizing pressure.
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.
Top Mounted Handwheel
ACTUATOR
H
C
J
C
ACTUATOR
SIZE
mm Inch mm Inch
40 281 11.06 356 14.00
60 359 14.12 432 17.00
70
(1)
335 13.62 356 14.00
1. Size 70 available in Type 1052 only.
Figure 3. Top Mounted Handwheel
WARNING
To avoid personal injury or parts
damage, do not use an operating
pressure that exceeds the Maximum
Diaphragm Casing Pressure (table 1)
or produces a torque greater than the
Maximum Allowable Valve Shaft
Torque (see Catalog 14). Use
pressure-limiting or pressure-relieving
devices to prevent the diaphragm
casing pressure from exceeding its
limit.
Actuator Mounting
Use the following steps to connect the actuator to a
valve body or other equipment. Unless otherwise
specified, key numbers are shown in figures 12
and 13. Mounting dimensions are shown in figures 4,
5, 6, and 7.
Note
For an actuator with an H mounting
adaptation and a 22.2 through 38.1 mm
(7/8 through 1-1/2 inch) output shaft,
find dimensions and center of gravity
information in figures 3, 4, 5, 6, and 9,
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
5
and approximate weights in table 7.
This information is required for proper
fabrication of the user-provided
bracket and coupling.
1. For an actuator with an H mounting adaptation,
attach an appropriate mounting bracket (not
provided) to the mounting plate (key 22) with the cap
screws (key 78). See figures 4, 5, and 6 for
mounting dimensions on the mounting plate. Tighten
the cap screws to the bolt torques listed in table 10.
2. Consult figure 10 for available mounting styles
and positions. The actuator is normally positioned
vertically with the valve body or other equipment in a
horizontal pipeline.
Note
If the milled flats or the coupling on
the end of the actuator output shaft
(key 87) are oriented such that the
output shaft cannot accommodate the
operated equipment shaft, refer to the
Changing Positions portion of the
Changing Actuator Mounting section.
This procedure describes how the
output shaft can be repositioned to
accommodate the operated equipment
shaft.
3. If using an actuator with a J mounting adaptation,
note that the valve shaft coupling (key 90) is
furnished with two keyways lettered A and B as
shown in figure 8 and 12 (letters C and D on the
coupling are not used and can be disregarded).
Align the appropriate keyway with the keyway in the
operated equipment shaft. If using a Fisher butterfly
valve, align the appropriate keyway on the coupling
with the valve shaft keyway indicated in table 8.
Then install the woodruff key (key 91) in the shaft
keyseat, and slide the coupling onto the shaft. It is
helpful to apply a light coat of grease to the inside of
the coupling before sliding it onto the shaft.
4. For an actuator with an H mounting adaptation,
slide the actuator (with the user-provided mounting
bracket attached) into the user-provided coupling on
the operated shaft. Then, secure the actuator to the
operated equipment in the desired mounting position
with the appropriate fasteners, such as mounting
cap screws. See figures 4, 5 and 6 for output shaft
dimensions.
5. For an actuator with a J mounting adaptation,
secure the mounting bracket (key 22) to the valve
body with the cap screws (key 78, not shown).
Tighten the cap screws to the bolt torques in
table 10. For 31.8 and 38.1 mm (1-1/4 and 1-1/2
inch) valve shafts, also place the two spacers
(key 92, not shown) between the mounting bracket
and valve body during this step.
6. For an actuator with a J mounting adaptation
and a 50.8 mm (2-inch) output shaft (key 87,
figure 14), note that the valve shaft coupling (key 90,
figure 14) is furnished with two keyways lettered A
and B as shown in figure 8 (letters C and D on the
coupling are not used and can be disregarded).
Align the appropriate keyway with the keyway in the
operated equipment shaft. Then, install the woodruff
key (key 91, not shown in figure 14) in the shaft
keyseat, and slide the coupling onto the shaft using
the appropriate coupling keyway (see table 8 and
figure 8). It is helpful to apply a light coat of grease
to the inside of the coupling before sliding it onto the
shaft. Secure the actuator (user-provided mounting
bracket) to the operated equipment in the desired
mounting position with the appropriate fasteners,
such as mounting cap screws.
7. Follow the instructions given in the Turnbuckle
Adjustment section before proceeding to the Loading
Connection portion of this section.
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
6
Table 4. Style H or J Mounting Dimensions
E
ACTUATOR SIZE C
Type 1051 Type 1052
F H P Y
mm
40 333 505 607 54 114 175 73
60 473 749 876 64 121 186 76
70
(1)
536 – – – 849 64 121 186 76
Inch
40 13.12 19.88 23.88 2.12 4.50 6.88 2.88
60 18.62 29.50 34.50 2.50 4.75 7.31 3.00
70
(1)
21.12 – – – 33.44 2.50 4.75 7.31 3.00
1. Size 70 available in Type 1052 only.
1/4-INCH NPT
Figure 4. Type 1051 Mounting Dimensions (refer to table 4)
19A1465-C
C0577-3 / IL
NOTE:
SEE PARTS LIST FOR WOODRUFF KEY NUMBERS
1
1
1/4-INCH NPT
C (DIA)
E
E
H
Y
F
P
H
Y
TYPE 1051 TYPE 1051 STYLE H
MOUNTING ADAPTATION
WOODRUFF KEY
TYPE 1051 STYLE J
MOUNTING ADAPTATION
19A1459-B
19A1459-B
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
7
Figure 5. Type 1052 Mounting Dimensions (refer to table 4)
C0676-3 / IL
NOTE:
SEE PARTS LIST FOR WOODRUFF KEY NUMBERS
1
19A1467-E /
1
1/4-INCH NPT
C (DIA)
E
H
Y
F
P
TYPE 1052
WOODRUFF KEY
TYPE 1052 STYLE J ADAPTATION
9.5 THRU 38.1 mm (3/8 THRU 1Ć1/2ĆINCH)
OUTPUT SHAFTS
19A1461-D
19A1461-G
1/4-INCH NPT
E
H
Y
TYPE 1052 STYLE J MOUNTING ADAPTATION
FOR 44.5 AND 50.8 mm (1Ć3/4 AND 2ĆINCH)
KEYED EQUIPMENT SHAFT
19A1461-D
TYPE 1052 STYLE H ADAPTATION
12.7 THRU 38.1 mm (1/2 THRU 1Ć1/2ĆINCH)
OUTPUT SHAFTS
E
H
Y
S (DIA)
M
K
N
Sj
L
V
K
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
8
Table 5. Style H Mounting Dimensions
ACTUATO
R SIZE
1051
ACTUATO
R SIZE
1052
S
ACTUATOR
OUTPUT SHAFT
DIAMETER
V L K
(1)
T U
W
1051
1052
mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch
40 40 22.2 7/8 26.2 1.03 19.1 0.75
15.75
15.62
0.620
0.615
57.2 2.25 28.4 1.12
5/16-18
UNC
40 & 60 28.6 1-1/8 26.2 1.03 19.1 0.75
22.10
21.97
0.870
0.865
76.2 3.00 38.1 1.50
3/8-16
UNC
40 & 60
40, 60 &
70
38.1 1-1/2 28.4 1.50 28.4 1.12
28.45
28.32
1.120
1.115
88.9 3.50 44.5 1.75
1/2-13
UNC
1. Tolerance for the K dimension is indicated by showing maximum and minimum dimensions.
Figure 6. Type 1051 and 1052 Style H Mounting Dimensions (refer to table 5)
22.2 THRU 38.1 mm
(7/8 THRU 1Ć1/2 INCH)
OUTPUT SHAFTS WITH
STYLE H MOUNTING
22.2 THRU 38.1 mm
(7/8 THRU 1Ć1/2 INCH)
OUTPUT SHAFTS WITH
STYLE H MOUNTING
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
9
Table 6. Style J Mounting Dimensions
ACTUATOR
SIZE 1051 &
VALVE SHAFT
DIAMETER
COUPLING
(1)
INNER
DIAMETER
V L
(2)
K T U W
1052
mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch
9.5 3/8
9.53
9.58
0.375
0.377
137 5.38 39.6 1.56 15.7 0.62 117 4.62 - - - - - - 11.2 0.44
40
12.7 1/2
12.70
12.75
0.500
0.502
137 5.38 39.6 1.56 15.7 0.62 117 4.62 - - - - - - 11.2 0.44
15.9 5/8
15.90
15.95
0.626
0.628
160 6.31 49.3 1.94 25.4 1.00 146 5.75 31.8 1.25 11.2 0.44
19.1 3/4
19.05
19.10
0.750
0.752
160 6.31 47.8 1.88 20.6 0.81 146 5.75 31.8 1.25 11.2 0.44
40 & 60
25.4 1
25.43
25.48
1.0010
1.0025
160 6.31 47.8 1.88 17.5 0.69 146 5.75 31.8 1.25 11.2 0.44
31.8 1-1/4
31.75
31.80
1.250
1.252
148 5.81 68.3 2.69 30.2 1.19 210 8.25 50.8 2.00 17.5 0.69
60 & 70
(3)
38.1 1-1/2
38.13
38.18
1.501
1.503
148 5.81 68.3 2.69 23.9 0.94 210 8.25 50.8 2.00 17.5 0.69
50.8
1-3/4
& 2
44.45
44.50
1.750
1.752
123 4.84 69.9 2.75 - - - - - - 88.9 3.50 44.5 1.75
1/2-13
UNC
1/2-13
UNC
60 & 70
(3)
50.8 2
50.83
50.90
2.001
2.004
123 4.84 69.9 2.75 - - - - - - 88.9 3.50 44.5 1.75
1/2-13
UNC
1/2-13
UNC
1. Tolerance for the Coupling Inner diameter is indicated by showing maximum and minimum dimensions.
2. The L dimension is the matchline to the end of the actuator shaft.
3. Size 70 is only available for the Type 1052.
Figure 7. Type 1051 and 1052 Style J Mounting Dimensions (refer to table 6)
Y
Sj
L
V
K
19A1461-G
STYLE J MOUNTING
44.5 AND 50.8 mm (1Ć3/4 AND 2ĆINCH)
9.5 AND 38.1 mm (5/8 AND 1Ć1/2ĆINCH)
44.5 AND 50.8 mm (1Ć3/4 AND 2ĆINCH)
KEYED EQUIPMENT SHAFTS WITH
STYLE J MOUNTING
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
10
Table 7. Approximate Actuator Weights
TYPE 1051 TYPE 1052 TOP-MOUNTED HANDWHEEL
SIZE
Kg Lb Kg Lb Kg Lb
40
60
70
43
89
–––
94
197
–––
45
92
123
99
203
272
7.3
11
21.3
16
24
47
Table 8. Keyway Alignment Information
(1)
DESIRED
VALVE SHAFT KEYWAY TO USE FOR FISHTAILR DISC VALVE
BODIES
(2)
(SEE FIGURE 10)
DESIRED
ACTUATOR
DESIRED
SHAFT
ROTATION,
ACTUATOR
MOUNTING
COUPLING
KEYWAY TO
(3)
Clockwise to
Close Valve Action
(4)
Counterclockwise to
Close Valve Action
(4)
ACTION
OO,
DEGREES
POSITION
USE
(3)
Flow Left to
Right
(4)
Flow Right to
Left
(4)
Flow Left to
Right
(4)
Flow Right to
Left
(4)
1 B Nose Tail Tail Nose
Push Down to
2 A Tail Nose Nose Tail
Push Down to
Open (PDTO)
60 or 90
3 B Tail Nose Nose Tail
p( )
4 A Nose Tail Tail Nose
1 A Tail Nose Tail Nose
Push Down to
2 B Tail Nose Tail Nose
Push Down to
Close (PDTC)
60
(5)
or 90
3 A Nose Tail Nose Tail
()
4 B Nose Tail Nose Tail
1. For actuators with J mounting.
2. For conventional disc valve bodies, use either valve shaft keyway.
3. See figure 10 for reference coupling orientation to use with this table.
4. When viewed from actuator side of valve body.
5. For 60-degree rotation with PDTC action, the coupling and actuator output shaft assembly will be offset 30 degrees clockwise (for actuator housing construction style B) or
counterclockwise (for actuator housing construction Style A) in the lever when viewed from the splined end of the actuator shaft. 30 degrees is one spline tooth for 9.5, 12.7, and 15.9
mm (3/8, 1/2, and 5/8-inch) valve shafts and two spline teeth for 19.1 through 38.1 mm (3/4 through 1-1/2 inch) valve shafts.
Figure 8. Valve Shaft Coupling
EXPLODED VIEW OF VALVE SHAFT
AND COUPLING
REFERENCE COUPLING ORIENTATION
FOR TABLE 8
NOTE:
FOR USE WITH J MOUNTING ADAPTATION (UP TO 50.8 mm (2-INCH)
KEYED SHAFT DIAMETERS.
1
1
A3253-1
FULL KEYWAY
LOCATED ON
NOSE AND TAIL
SIDE OF VALVE SHAFT
VALVE SHAFT
COUPLING
PARTIAL KEYWAY
FOR DETERMINING
DISC POSITION
USE APPROPRIATE LETTERED
KEYWAY AS INDICATED IN
TABLE 8
USE APPROPRIATE
VALVE SHAFT
KEYWAY AS
INDICATED
IN TABLE 8
KEYWAY A
KEYWAY B
ABOVE
KEYWAY A
19B1465-B
1051 & 1052 H & J
Instruction Manual
Form 5587
November 2006
11
Center of Gravity Dimensions
ACTUATOR ACTUATOR
X Y
ACTUATOR
TYPE
ACTUATOR
SIZE
mm Inch mm Inch
40 15 0.6 191 7.5
1051
60 10 0.4 361 14.2
40 15 0.6 241 9.5
1052
60 10 0.4 432 17.0
1052
70 23 0.9 488 19.2
Figure 9. Center of Gravity Dimensions
Loading Connection
1. Connect the loading pressure piping to the
pressure connection in the top of the diaphragm
casing.
For size 40 through 60 actuators, run either 1/4-inch
pipe or 3/8-inch tubing between the 1/4-inch
pressure connection and the positioner or automatic
controller.
For size 70 actuators, run either pipe or tubing
between the pressure connection and the positioner
or automatic controller. If necessary, remove
the 1/4-inch bushing in the pressure connection to
increase connection size.
2. Keep the length of pipe or tubing as short as
possible to avoid transmission lag in the control
signal. If an accessory (such as a volume booster or
a positioner) is used, be sure that the accessory is
properly connected to the actuator. If a positioner is
part of the assembly, the pressure connection to the
actuator will normally be made at the factory.
3. When the actuator is completely installed and
connected to the instrument, check for correct action
(air-to-open or air-to-close) to match the controlling
instrument. For successful operation, the actuator
stem and operating shaft must move freely in
response to the loading pressure change on the
diaphragm.
Adjustment
WARNING
Before performing any adjustment
steps, follow the steps in the
WARNING at the beginning of the
Maintenance section.
Type 1051 and 1052 Turnbuckle
Adjustment
Correct turnbuckle adjustment ensures that the valve
body or other operated equipment is correctly closed
when the actuator is against its travel stops. The
turnbuckle adjustment is the only adjustment
necessary on the Type 1051 actuator. Key numbers
used in this procedure are shown in figure 12 for
Type 1051 actuators and in figure 13 for Type 1052
actuators.
For accurate adjustment, remove the valve body or
other operated equipment from the pipeline.
A regulated air supply will be required to stroke the
actuator. Consult table 9 for the sizes of the three
open end wrenches required for this procedure.
1. Remove the access plate (key 59). Also remove
the machine screws (key 60), if present.
Note
For the most accurate adjustment of
the actuator, do not remove the cover
(key 33) during this procedure.
2. Loosen the lower locknut (key 16).
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