SQM40/41…
Technical Instructions
Document No. 7817US
October 6, 2010
Actuators for air and gas dampers
Description
SQM40/41… actuators are used for the positioning of flow control valves, butterfly
valves, dampers or any application requiring rotary motion. The SQM40/41… actuators
accommodate control input signals of 4 to 20 mA, 0 to 135 Ω, 2 to10 Vdc, position
proportional and floating control. SQM4… actuators are available with up to six internal,
easily adjustable switches.
The actuators are used primarily for precise flow control of gas, oil or combustion air.
The NEMA 4 SQM40/41… actuator may be mounted in any position. A selection of
mounting brackets and shaft options provides installation flexibility and allows for the
simple replacement of most competitive actuators.
Features
45 or 90 in-lb
Clockwise and counterclockwise versions
Running times of 12 or 25 seconds
Various drive shaft options
Drive shaft disengagement clutch
C-UL-US, CE approved
NEMA 4 weatherproof enclosure
Internal position indication
Mounting brackets available to replace competitive actuators
Modulating version accepts 4 to 20 mA, 0 to 135 Ω or 2 to10 Vdc
Zero and span adjustment
Application
SQM40/41… actuators are suited for both industrial and commercial applications. On
burner applications requiring high turndown and reliable ignition, the auxiliary switches
can be applied to create separate positions for burner ignition and low fire.
The shaft disengagement clutch allows for quick manual alignment of the actuator
shaft with a connected valve or linkage.
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