Fisher 1052 spring-return diaphragm rotary actuators operate splined shaft rotary valves and are suitable for on/off or throttling service. Designed for easy installation of a broad range of options: limit switches, position indicating switches, positioners, and manual over-rides.
Available with fail-open or fail-close construction and can be mounted in any of four actuator/valve mounting positions. These actuators can be mounted on a broad range of Fisher valves or used with other equipment.
Single joint linkage with splined and clamped lever minimizes lost motion and improves control accuracy.
Rugged construction provides stability, corrosion resistance, and protection from deformation should over-pressurization occur.
Includes an externally accessible spring adjuster to relieve spring compression. Actuator/valve linkage is completely enclosed, yet the valve packing adjustment remains accessible without removing any parts.