HVAC Actuators | McMaster-Carr

	Voltage Voltage

24V AC

24V DC

	For Maximum Damper Shaft Height For Maximum Damper Shaft Height

3/8"

1/2"

3/4"

	Material Material

Aluminum

Plastic

	Maximum Control Signal Maximum Control Signal

10V DC

20mA

	For Maximum Damper Shaft Diameter For Maximum Damper Shaft Diameter

1/2"

3/4"

1 1/16"

	Torque Torque

	For Damper Shaft Shape For Damper Shaft Shape

Round

Square

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Current Current

0.1A

0.7A

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Maximum Damper Shaft Width For Maximum Damper Shaft Width

3/8"

1/2"

3/4"

	Maximum Rotation Maximum Rotation

90°

95°

	Minimum Rotation Minimum Rotation

0°

30°

35°

	Overall Depth Overall Depth

	Overall Height Overall Height

	Overall Width Overall Width

2 3/4"

3 1/4"

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

	Return Type Return Type

With Spring

Without Spring

	Minimum Control Signal Minimum Control Signal

0V DC

0mA

	Direction of Operation Direction of Operation

6 Products

Proportional HVAC Damper Actuators

This actuator provides better control than incremental actuators because it is constantly being positioned in response to duct airflow requirements. Use to automatically adjust dampers to regulate airflow. It attaches to the damper shaft to rotate it open and closed when signaled by a controller (not included). Actuator can be set to return the damper to an open or closed position if the power fails. Use the crank for precise adjustments.

					For Max. Damper Shaft						Overall
Torque, in.-lbs.	Voltage	Current, A	Control Signal	Electrical Connection Type	Dia.	Ht.	Wd.	Material	Direction of Operation	Rotation Range	Ht.	Wd.	Dp.		Each
With Spring Return
177	24V AC/24V DC	0.7	0-10V DC/0-20mA	Hardwire	3/4"	1/2"	1/2"	Aluminum	Clockwise, Counterclockwise	30°-90°	10 3/8"	4"	3 1/4"	0000000	0000000

Incremental HVAC Damper Actuators

Without Spring Return

With Spring Return

When duct airflow varies from the setpoint, these actuators open and close until the system requirement is restored. Use to automatically adjust dampers to regulate airflow. Actuators attach to the damper shaft to rotate it open and closed when signaled by a controller (not included).

Actuator with spring return can be set to return the damper to an open or closed position if the power fails. Use the crank for precise adjustments.

				For Max. Damper Shaft						Overall
Torque, in.-lbs.	Voltage	Current, A	Electrical Connection Type	Dia.	Ht.	Wd.	Material	Direction of Operation	Rotation Range	Ht.	Wd.	Dp.		Each
Without Spring Return
35	24V AC	0.1	Hardwire	1/2"	3/8"	3/8"	Plastic	Clockwise, Counterclockwise	0°-90°	5 1/8"	2 3/4"	2 1/4"	0000000	0000000
With Spring Return
177	24V AC/24V DC	0.7	Hardwire	3/4"	1/2"	1/2"	Aluminum	Clockwise, Counterclockwise	30°-90°	10 3/8"	4"	3 1/4"	0000000	000000

Incremental and Proportional HVAC Damper Actuators

Actuators automatically switch between incremental and proportional control to adjust dampers to regulate airflow. Actuators attach to the damper shaft to rotate it open and closed when signaled by a controller (not included).

				For Max. Damper Shaft						Overall
Torque, in.-lbs.	Voltage	Current, A	Electrical Connection Type	Dia.	Ht.	Wd.	Material	Direction of Operation	Rotation Range	Ht.	Wd.	Dp.		Each
Without Spring Return
90	24V AC/24V DC	0.02	Hardwire	1 1/16"	3/4"	3/4"	Plastic	Clockwise, Counterclockwise	35°-95°	6 5/8"	3 1/4"	2 1/2"	0000000	0000000
180	24V AC/24V DC	0.02	Hardwire	1 1/16"	3/4"	3/4"	Plastic	Clockwise, Counterclockwise	35°-95°	7 7/8"	4"	2 5/8"	0000000	000000
310	24V AC/24V DC	0.02	Hardwire	1 1/16"	3/4"	3/4"	Plastic	Clockwise, Counterclockwise	35°-95°	7 7/8"	4"	2 5/8"	0000000	000000