Siemens OpenAir GBB Series Technical Basics page 20

Sizing chart
Example
Determining the
actuator type
Notes
20/44
Siemens
Smart Infrastructure
The following chart (example EMCO) allows for determining the total torque for this air
damper type.
10
9
8
7
6
5
4
3
2
1
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Damper for blinds:
Width = 1200 mm
Height = 1005 mm
Total pressure = 2000 Pa
The total torque of about 10 Nm results from the chart.
Determine your type of actuator from the table below:
[ ]
total torque Nm
If
1
SF
£
15 Nm
£
25 Nm
£
30 Nm
£
35 Nm
£
70 Nm
1
Safety Factor SF:
When calculating the number of actuators, remember to include nondefinable
variables such as slight misalignment, damper age, etc., as a safety factor. We
recommend a total safety factor of 0.8.
Apply the same factor when calculating the actuator torque by the torque rating.
If the required actuator torque is greater than 15 Nm, you can use the following:
2
One actuator of type series GBB..1, or
3
Two actuators (tandem-mounted powerpack) of type series GEB13..1, GEB33..1, or
4 One actuator of type series GIB..1 .
5 If the actuator torque is greater than 35 Nm, two actuators of type series GIB..1 can
mechanically be connected and mounted on the damper shaft.
(See data sheets N4621, N4626, and N4699).
Rotary actuators without spring return GBB/GIB..1
Engineering notes
Damper width B [mm]
then use type
GEB..1 (15 Nm)
GBB..1 (25 Nm)
2 x GEB..1 (2 x 15 Nm)
GIB..1 (35 Nm)
2 x GIB..1 (2 x 35 Nm)
1600
10 20
1200
10 20
800
5 10 15
400
5 10 15
Total torque [Nm]
2
3
4
5
CE1Z4626en
2019-11-28