Rotary Actuator Reduces Valve/Actuator Dimensions
Emerson Process Management introduces the Fisher 2052 spring-and-diaphragm rotary actuator. The compact actuator reduces valve/actuator envelope dimensions to provide greater valve installation versatility for both skids and tight processing lines where space is at a premium, according to the company.
The new Fisher 2052 actuator can be installed on rotary-shaft valve bodies for throttling or on-off applications. The actuator linkage features a clamped shaft lever and a single pivot point to reduce lost motion between the actuator and the valve. The result is 0.5% or less typical variability for a Fisher rotary control valve assembly.
In addition to its small size, the Fisher 2052 delivers several operations and maintenance advantages. It has an inherent failsafe position on loss of operating air. In contrast to piston style actuators that rely on O-ring seals, the double-sided diaphragm in the 2052 provides a longer service life.