Rotary diaphragm actuators are often used for lower air pressure applications or when actuation by other inert gases or non-compressible fluids such as water and oil is preferred. Constructed with a ductile iron or carbon steel cast housing, a UV resistant polyester powder coat is applied to protect the actuator in most environments. Rotary diaphragm actuators can be operated at extreme temperatures, as low as -40ºF and as high as 392ºF.
The rolling Buna-N diaphragm style used has a special layered design including polyamine fabric to maximize longevity. The low friction UMW polyethylene bearing provides very smooth actuation. Double travel stops enable fully opened or closed adjustment.
Features and Options:
ISO 5211 flanged
133 - 7049 in-lbs torque
Can be easily field adjusted for fail closed or fail open