Application
Special characteristics
Nominal sizes
Variants
Parts and characteristics
Attachments
Construction features
Material and surfaces
Standards and guidelines
Maintenance
Staircase swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Staircase swirl diffusers supply the air directly to the occupied zone and even to individual room occupants. The result is mixed flow ventilation for comfort zones and an excellent air quality in the occupied zone.
Type SD staircase swirl diffusers have fixed blades. Different attachments are available to influence the air pattern and adapt it to local requirements. A spigot can be used to achieve air discharge parallel to the installation surface, while a cross bar can be used to achieve angled air discharge. The air pattern should be such that the air does not blow onto the feet of people sitting near the diffuser. If staircase swirl diffusers are placed underneath seats or vertically in the steps between seats, angled air discharge is recommended. If diffusers are placed in the steps below the seats, parallel air discharge is recommended. The supply air to room air temperature difference may range from –6 to +6 K.
Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures..
SD-Q-LQ-S (supply air), sound power level and total differential pressure
NG | qv [l/s] | qv [m³/h] | Δpt [Pa] | LWA [dB(A)] |
---|---|---|---|---|
180 | 10 | 36 | 8 | <15 |
15 | 54 | 18 | 24 | |
20 | 72 | 33 | 32 | |
25 | 90 | 51 | 39 |
SD-Q-LQ-T (supply air), sound power level and total differential pressure
NG | qv [l/s] | qv [m³/h] | Δpt [Pa] | LWA [dB(A)] |
---|---|---|---|---|
180 | 10 | 36 | 3 | <15 |
15 | 54 | 7 | 21 | |
20 | 72 | 12 | 32 | |
25 | 90 | 19 | 40 |
SD-Q-LR-S, SD-R-LR-S (supply air), sound power level and total differential pressure
NG | qv [l/s] | qv [m³/h] | Δpt [Pa] | LWA [dB(A)] |
---|---|---|---|---|
180 | 10 | 36 | 9 | <15 |
15 | 54 | 21 | 25 | |
20 | 72 | 38 | 34 | |
25 | 90 | 59 | 41 |
SD-Q-LR-T, SD-R-LR-T (supply air), sound power level and total differential pressure
NG | qv [l/s] | qv [m³/h] | Δpt [Pa] | LWA [dB(A)] |
---|---|---|---|---|
180 | 10 | 36 | 4 | <15 |
15 | 54 | 10 | 25 | |
20 | 72 | 18 | 35 | |
25 | 90 | 27 | 43 |
Staircase swirl diffusers with square or circular diffuser face and fixed air control blades for swirling supply air discharge creating high induction levels. For supply air only, for comfort zones. Installation into the vertical parts of steps, or into horizontal or sloping floor areas which do not carry foot traffic
Special characteristics
Material and surfaces
Technical data
Sizing data
SD | – | Q | – | LQ | – | S | / | 180 | / | P1 - RAL 9006 |
| | | | | | | | | | | | |||||
1 | 2 | 3 | 4 | 5 | 6 |
Type | SD |
Construction style | Square diffuser face |
Perforation pattern | square |
Fixing | with spigot |
Nominal size [mm] | 180 |
Exposed surface | powder-coated, RAL 9006 (white aluminium) |
Installation and commissioning
The schematic diagrams are provided to illustrate installation details.
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Kontakt
Sme tu pre vás
Uveďte prosím vašu správu a druh otázky
Tel.: +420 283 880 380 | Fax: +420 286 881 870
Kontakt
Ďakujeme vám za správu!
Vaša správa je odoslaná a čoskoro bude spracovaná.
Naše servisné oddelenie sa s vami čo najrýchlejšie spojí Pre obecné informácie o výrobkoch alebo službách môžete tiež zavolať:
Tel.: +420 283 880 380 | Fax: +420 286 881 870