Fisher™ 1078 Declutchable Manual Actuator
The Fisher™ 1078 Declutchable Manual Actuator, developed by Emerson, is a rugged and reliable manual override device designed to provide precise manual control of rotary valves and actuators in critical process applications. It allows operators to manually position the valve when pneumatic, hydraulic, or electric power is unavailable — ensuring safe and continuous system operation during maintenance, emergencies, or power loss.
Featuring a declutchable mechanism, the 1078 actuator enables seamless switching between manual and automatic operation without affecting valve alignment or performance. The declutch lever disengages the gear drive from the power actuator, allowing smooth and direct manual operation through the handwheel or lever.
Built for industrial durability, the Fisher 1078 actuator incorporates corrosion-resistant materials, compact design, and high-torque manual gearing for easy operation under demanding field conditions. It’s compatible with a wide range of Fisher rotary actuators, including models in the 1052, 2052, and 1061 series, making it ideal for both new installations and retrofit applications.
The Fisher 1078 Declutchable Manual Actuator provides dependable manual backup capability, ensuring maximum operational safety, flexibility, and control in every environment.
Technical Specification of Fisher™ 1078 Declutchable Manual Actuator
- Actuation
- Rotary, Manual
- Certifications
- PED, CUTR, ATEX
- Control Type
- On/Off, Positioning, Positioning
- Power Source
- Manual
- Valve Type
- Ball Valve, Butterfly Valve, Eccentric Plug Valve, Triple Offset Valve
- Other Configurations
- Contact your local Emerson business partner or sales office to learn about additional specifications or options for this product.
Feature of Fisher™ 1078 Declutchable Manual Actuator
- Direct mounting to the actuator housing simplifies installation and eliminates the need for yokes and other brackets.
- A lever-operated eccentric bearing support on the input shaft allows engagement of the worm gear with the sector at any point of rotation. Because the travel indicator components are mounted on a through shaft, accurate travel indication is maintaine
- The disengagement lever is locked in both the engaged and disengaged positions by a detent mechanism, which must be released before the lever can be moved. This provision reduces the possibility of inadvertent or accidental operation. In addition, stop&#