Brochure

4
#1: Assess damper physical properties
Assessing the damper’s physical properties and checking the
damper specification is critical in finding the torque needed.
Understanding other application requirements and mounting
needs comes with determining a more specific part number.
Most of the time, you can find out the damper's physical
properties by simply looking at it. You can see whether the
damper is an opposed blade, or parallel blade damper; or if
there are seals on it and so forth. However, if the damper is
already installed and you can’t see inside, then the easiest
way to determine the damper’s physical properties is by
looking for the damper product label. A damper product label
will have most of the information that is needed. Sometimes,
the label may also include the required torque, or a specific
actuator listed.
Finding the label and the damper part number:
If the label and the damper part number can't be found, then
visit the specific manufacturer's website. Search the damper
part number, and link to a torque requirement table that
shows a torque factor.
2
Selecting the
right actuator
Actuator Selection Checklist
1. Assess damper physical properties

2. Check the specifications
3. Understand application requirements
4. Adjust for mounting or accessories
After creating a checklist, follow this path:
Create
Checklist
Check
Damper Label
Visit
Manufacturer’s
Website
Multiply
Damper Area
by Torque
Factor
Determine
Torque Factor
Evaluate
Torque
Requirement
Table
Required
Torque
BEFORE GETTING STARTED:
To determine what actuator is needed
for the application use a checklist like the
one in the example shown to the right.
Information that can be
found on a label:
– Square Footage
– Required Torque
– Max Pressure Ratings
– Damper Part Number
– Max Air Velocity or CFM
– Temp. Ratings
– Seal Type or Material
– Blade Length
– Blade Action