Instruction Manual
D101329X012
1078 Actuator
June 2017
2
Table 1. Specifications
Available Configurations
Direct and reverse acting; see Handwheel Rotation
in
this specification table
Actuator Sizes
See tables 2, 3, and 4
Acceptable Coupling Shaft Diameters
See tables 2, 3, and 4
Power Actuator Compatibility
See tables 2, 3, and 4
Output Torque
See tables 2, 3, and 4
Wheel‐Rim Force
See tables 2, 3, and 4
Handwheel Turns Required For Full Rotation
See tables 2, 3, and 4
Handwheel Rotation
Direct Acting Construction:
Clockwise handwheel
rotation closes the valve (produces clockwise valve
shaft rotation)
Reverse Acting Construction:
Clockwise handwheel
rotation closes the valve (produces counterclockwise
valve shaft rotation)
Decide whether Direct or Reverse Action is required
by referring to the appropriate valve or power
actuator instruction manual and determining valve
rotation.
Maximum Output Rotation
90 degrees; limited by travel stops in the power
actuator
Standard Mounting Positions
1052 (size 70)
(1)
:
handwheel down (std) or
handwheel right‐hand or left‐hand mount (optional)
1061 (sizes 30, 40, 60, 68, 80, and 100)
(1)
:
handwheel down (std) or handwheel right‐hand or
left‐hand mount (optional)
2052 (sizes 1, 2, and 3)
(1)
:
handwheel down (std) or
handwheel right-hand or left-hand mount (optional)
Approximate Weights without Handwheel
Size AAA:
2.7 kg (6 lb)
Size AA:
6.8 kg (15 lb)
Size A:
9.5 kg (21 lb)
Size 2A:
13.6 kg (30 lb)
Size 1A:
15.9 kg (35 lb)
Size B:
23.1 kg (51 lb)
Size C:
29.9 kg (66 lb)
Size D:
63.5 kg (140 lb)
Size
II
‐FA:
81.6 kg (180 lb)
Handwheel Weight
6‐inch:
1.8 kg (4 lb)
8‐inch:
2.3 kg (5 lb)
12‐inch:
3.2 kg (7 lb)
16‐inch:
6.8 kg (15 lb)
24‐inch:
5.4 kg (12 lb)
30‐inch:
6.4 kg (14 lb)
36‐inch:
7.3 kg (16 lb)
1. If a positioner is used, the right‐hand or left‐hand mounting option will be limited to the side away from the positioner.
Description
The 1078 manual actuator, shown in figures 1 and 2, is a declutchable unit for manual operation of control valves and
equipment that use power actuators. The 1078 manual actuator mounts directly to Fisher 1052 size 70; 1061 sizes 30,
40, 60, 68, 80, and 100; and to all sizes of 2052 actuators. The 1078 manual actuator can be engaged to allow manual
operation of the valve when the power actuator is not in use. It can be disengaged to allow automatic operation of the
valve by the power actuator. The mechanism used allows manual actuator engagement at any point of power actuator
rotation.
