Variants
Construction
Parts and characteristics
Classification
Useful additions
Construction features
Air terminal units from H = 400 mm as double version (2 dampers with separate setting scales)
Materials and surfaces
Galvanised sheet steel constructionMaintenance
① Damper blade
② Bellows
③ Bellows inlet
④ Scale sticker
⑤ Connection for equipotential bonding
⑥ Visual display of the damper blade position
⑦ Rotary knob
Functional description
The air terminal unit is a mechanical self-powered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces so that the set volume flow rate is kept constant within the differential pressure range. The aerodynamic forces of the airflow create a closing torque on the damper blade. An inflating bellows amplifies this force and at the same time acts as a damping element. The closing torque is countered by a leaf spring that unrolls over a cam plate. The cam plate is adapted in such a way that the damper blade moves when the differential pressure changes. As a result, the volume flow rate remains constant within narrowEfficient commissioning
Using the rotary knob, the desired volume flow setpoint can be set quickly on the external scale, no prior measurement required. The advantage over conventional flow adjustment dampers is that no repeated measurements or adjustments during commissioning are required. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered air terminal units. The air terminal unit reacts immediately and keeps the set air volume constant.
Nominal sizes | 200 × 100 – 600 × 600 mm |
Volume flow rate range | 39 – 3500 l/s or 140 – 12600 m³/h |
Volume flow rate control range | Approx. 25 to 100 % of the nominal volume flow rate |
Scale accuracy | ± 4 % |
Minimum differential pressure | 50 Pa |
Maximum differential pressure | 1000 Pa |
Operating temperature | 10 to 50 °C |
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.
Specification text
Air terminal units in rectangular design for constant air volume systems, mechanically self-powered, without external power supply, for supply or extract air, in 19 nominal sizes.Setting of the volume flow setpoint from the outside by rotary knob
Powder-coated construction (P1)
Variant with acoustic cladding (-D)
Mineral wool
Acc. to EN 13501, fire rating class A1, non-combustible
Air-regenerated noise
Case-radiated noise
1 Type
2 Acoustic cladding
No entry: none
D With acoustic cladding
3 Material
No entry: galvanised sheet steel
P1 Powder-coated RAL 7001, silver grey
4 Nominal size [mm]
Specify size width × height
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Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265