These bidirectional actuators do not require a damper linkage,ａnd are easily installed on dampers with 1/2 to 3/4 in.or 12 to 19 mm round shaftes, or 3/8 and 1/2 in.or 10,12,ａnd 14mm square shafts using the standard shaft clamp included with the actuator. An optional M9220-600 Jackshaft Coupler Kit is available for 3/4 to 1-1/16 in. or 19 to 27 mm round shafts, or 5/8 and 3/4 in. or 16, 18, and 19 mm square shafts.

A single M9220-xxx-3 Electric Spring Return Actuator provides a running and spring return torque of 177 Ib.in (20 N.m). Integaral line oltage auxiliary switches are available on the xxC models to indicate end-stop position, or to perform sweitching functions within the selected rotation range.