A: There are a wide variety of actuators types, operating modes, fail
positions, and accessories offered, the most common used for commercial dampers are identified
herein. Contact your local Ruskin representative for a selection specific to your application. a.
Types: (1) Electric (motor-operated) 24Vac/Vdc to 230Vac (2) Pneumatic (air-operated) 25psi to
120psi (3) Manual hand quadrants b. Operating modes: (1) Manual (2) 2-Position (3) Modulating c.
Fail position: (1) Non fail-safe (fail in place) (2) Fail-safe (fail open or closed) d. Ratings: (1)
Low temperature (2) NEMA 2,4,4x,7, or 9. e. Options and accessories: (1) Position feedback (4-20mA,
3-15psi, or switches) (2) Pressure regulators (3) Manual overrides Representative Locator
LINK Actuators and Damper Accessories LINK