Fisher® 1051 and 1052 spring-return diaphragm rotary actuators operate splined shaft rotary valves, such as eccentric disc (Fisher 8510B and 8560), 8532 and 9500, CV500 and V500 and Vee-Ball™ (V150, V200 and V300) valves. 1051 and 1052 actuators are both suitable for on-off service or for throttling service. The primary difference between these actuators is that the 1052 actuator has a spring adjuster which means it may be used with or without a positioner, depending on service requirements. The 1051 actuator, in throttling service, is normally equipped with a valve positioner.
Features & Benefits
Application Flexibility—1051 and 1052 rotary actuators are 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 (style F or G mounting), or used with other equipment (style H or J mounting).
Minimal Dead Band—Single joint linkage with splined and clamped lever minimizes lost motion and improves control accuracy.
Long Service Life—Rugged construction provides stability, corrosion resistance, and protection from deformation should over-pressurization occur.
Safety—Actuator-valve linkage is completely enclosed, yet the valve packing adjustment remains accessible without removing any parts. For safety during disassembly, spring compression is controlled on the Type 1051 actuator. The Type 1052 actuator has an externally accessible spring adjuster to relieve spring compression.
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