Siemens OpenAir GEB 1 Series Technical Basics page 19

Sizing diagram
Example
Determining the actuator
type
Notes
Siemens
Building Technologies
The following diagram (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 diagram.
Determine your type of actuator from the table below:
Ζ ∴
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 non-definable
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 30 Nm, two actuators of type series GIB...1 can
mechanically be connected and mounted on the damper shaft.
(See data sheets N4625, N4635, and N4699).
Technische Grundlagen: Drehantriebe GEB...1
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
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CM2Z4621en
2017-05-26