Emerson Fisher 1079 Data Sheet

Product Bulletin

1079 Manual Actuator

D500209X012

22.2:1079

January 2013

Fisherr 1079 Declutchable Manual Actuator

The 1079 manual actuator is a declutchable unit for
manual operation of keyed or square shaft control
valves and equipment that use a Hytork actuator. The
1079 manual actuator mounts directly on the Hytork
actuator and can be engaged to allow manual
operation of the valve when the power actuator is not
in use or disengaged to allow automatic operation of
the valve by the power actuator. The mechanism used
allows manual actuator engagement at any point of
poweractuatorrotation.

W6214

Fisher 1079 Manual Actuator Mounted on a

Hytork Actuator and A41 Valve

Features

 Direct Attachment to the Power Actuator-- Direct

mounting to the actuator housing simplifies
installation and eliminates the need for yokes and
other brackets.

 Engage Manual Actuator At Any Point of Rotation--

A lever-operated eccentricbearingsupportonthe
input shaft allows engagement of the worm gear
with the sector at any point of rotation.

 Positive Operation-- The disengagement lever is

held in both the engaged and disengaged positions
by a spring-loaded pin, which must be released
before the lever can be moved. This reduces the
possibility of inadvertent or accidental operation. In
addition, stop-pins at the fully engaged and fully
disengaged positions provide positive limits for
lever travel.

www.Fisher.com

Product Bulletin

22.2:1079
January 2013

Specifications

1079 Manual Actuator

D500209X012

Available Configurations

Direct acting; see Handwheel Rotation

Manual Actuator Sizes

See tables 1, 2, and 3

PowerActuatorCompatibility

Compatible with all sizes of Hytork actuator; see
tables 1, 2, and 3

Maximum Torque Output

See tables 1, 2, and 3

Wheel-Rim Force

See tables 1, 2, and 3

Handwheel Rotation

Clockwise handwheel rotation closes valve (produces
clockwise valve shaft rotation, as viewed from the
actuator end of the shaft)

Construction Materials

Housing and Cover: Cast iron
Drive Sleeve/Gear (Sector): Low-carbon steel/bronze
Worm Gear: Heat-treated steel

Input Shaft and Eccentric: Low-carbon steel
Pin Detent: 300 Series stainless steel
Shaft Bearings: Bronze

Standard Mounting Positions (see figure 1)

J Standard mounting is with the input shaft

perpendicular to the Hytork piston travel, with the
handwheel opposite the actuator supply c onnections;

J Optional mounting is with the handwheel on the

same side as the Hytork actuator supply connections

Approximate Weight without Handwheel

Size AAA: 7.3 kg (16 lb)
Size AA: 10 kg (22 lb)
Size A: 14 kg (31 lb)
Size B: 16 kg (35 lb)
Size C: 24 kg (52 lb)
Size D: 33 kg (72 lb)

Handwheel Weight

6-inch: 1.0 kg (2.25 lb)
8-inch: 2.0 kg (4.50 lb)
12-inch: 4.0 kg (8.75 lb)
24-inch: 5.4 kg (12.00 lb)
30-inch: 6.7 kg (14.75 lb)
36-inch: 7.8 kg (17.25 lb)

Figure 1. Fisher 1079 Actuator Mounting Positions

STANDARD
MOUNTING
POSITION

HYTORK ACTUATOR
SUPPLY CONNECTIONS

OPTIONAL MOUNTING
POSITION

A6186

SEAL RETAINER
SIDE OF VALVE

2

Product Bulletin

1079 Manual Actuator

D500209X012

Table1.ActuatorSizeSelectionandSpecifications for Keyed Shaft Valves (Fisher A31A)

MAXIMUM

ALLOWABLE

TORQUE

245
271

129
245

542
542
542
542
542

129
245
671
834
926
926
926

671
834

927
1171
1233
1582
1582
1582
1582

671

834

927
1171
1233
2203

2530
2568
2712

927
1171
1233
2203

2530
2568

4067
4067

(2)

2165

2400

1145
2165

4800
4800
4800
4800
4800

1145
2165
5941

7383
8200
8200
8200

5941

7383

8205
10,360
10,911

14,000
14,000
14,000
14,000

5941

7383

8205
10,360
10,911
19,494

22,396
22,728

24,000

8205
10,360
10,911
19,494

22,396
22,728

36,000
36,000

WHEEL-RIM FORCE FOR

(3)

(3)
(3)
(3)
(3)
(3)

(3)
(3)
(3)

(3)
(3)
(3)
(3)

(3)

(3)
(3)

ACTUATOR

SIZE

HYTORK

ACTUATOR

SIZE

GEAR

RATIO

HANDWHEEL

DIAMETER

mm Inches mm Inches NSm lbfSin N lbf

VALVE SHAFT

DIAMETER

(1)

203 8 14.3 0.5625 129 1145 214 48

AAA 70 thru280 24:1

305 12

203 8

AA 70 thru280 24:1

305 12

A 680A 40:1 610 24

B 1125 40:1 610 24

610 24

C 1370 54:1

762 30

610 24

D 2585 & 4580 64:1

762 30

914 36

1. Shaft diameter at the keyway.

2. Unless otherwisenoted, torque is limited by S17400 stainless steel (17-4PH H1025) shaft material at 38_C (100_F). For other shaftmaterials, consult your Emerson Process Management
sales office.

3. Maximum manual actuator output.

4. NPS 12 CL150 A31A and NPS 8 CL300 A31A.

17.5

23.8

14.3

17.5

23.8

28.6

30.2

31.8

41.3

14.3

17.5

23.8

28.6

30.2

31.8

41.3

23.8

28.6

31.8

30.2

31.8

38.1

41.3

44.5

47.6

23.8

28.6

31.8

30.2

31.8

38.1

41.3

44.5

47.6

31.8

30.2

31.8

38.1

41.3

44.5

47.6

57.2

0.6875

0.9375

0.5625

0.6875

0.9375

1.125

1.1875

1.25

1.625

0.5625

0.6875

0.9375

1.125

1.1875

1.25

1.625

0.9375

1.125

1.25

1.1875

1.25

1.5

1.625

1.75

1.875

0.9375

1.125

1.25

1.1875

1.25

1.5

1.625

1.75

1.875

1.25

1.1875

1.25

1.5

1.625

1.75

1.875

2.25

(4)

(4)(5)

(4)

(5)

(4)

(5)

(4)

(5)

22.2:1079

January 2013

MAXIMUM TORQUE

267
298

151
298

418
418
418
418
418

44

80
222
276
302
302
302

182
227
254
320
338
431
431
431
431

138
169
187
236
249
445

409
418
440

160
200
209
378

347
351

463
463

60
67

34
64

94
94
94
94
94

10
18
50
62
68
68
68

41
51
57
72
76
97
97
97
97

31
38
42
53
56

100

92
94
99

36
45
47
85

78
79

104
104

3