Application
Special characteristics
Nominal sizes
Variants
Connection
Parts and characteristics
Accessories
Useful additions
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
Functional description
Ceiling 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. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.
Type VD ceiling swirl diffusers have adjustable air control blades. Different air patterns allow for cooling or heating mode, or for the adjustment to varying loads. Horizontal air discharge is omni directional. Vertical air discharge is possible in heating mode. The supply air to room air temperature difference may range from –12 to +15 K.
An actuator (optional) adjusts the blades based on demand.
Nominal sizes | 425, 600, 775, 1050 mm |
Minimum volume flow rate | 95 – 675 l/s or 342 – 2430 m³/h |
Maximum volume flow rate, with LWA ≅ 50 dB(A) | 280 – 1490 l/s or 1008 – 5364 m³/h |
Supply air to room air temperature difference | –12 to +15 K |
Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.
The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°.
Exact values for all parameters can be determined with our Easy Product Finder design programme.
VD-H, sound power level and total differential pressure
425 | 95 | 342 | 6 | 21 |
425 | 150 | 540 | 15 | 32 |
425 | 215 | 774 | 31 | 42 |
425 | 280 | 1008 | 52 | 50 |
600 | 210 | 756 | 9 | 28 |
600 | 310 | 1116 | 20 | 37 |
600 | 410 | 1476 | 35 | 44 |
600 | 510 | 1836 | 54 | 50 |
775 | 375 | 1350 | 8 | 26 |
775 | 510 | 1836 | 14 | 34 |
775 | 660 | 2376 | 23 | 41 |
775 | 885 | 3186 | 42 | 50 |
1050 | 675 | 2430 | 13 | 36 |
1050 | 825 | 2970 | 19 | 41 |
1050 | 975 | 3510 | 27 | 46 |
1050 | 1120 | 4032 | 35 | 50 |
VD-V, sound power level and total differential pressure
425 | 95 | 342 | 6 | 17 |
425 | 175 | 630 | 19 | 31 |
425 | 260 | 936 | 41 | 41 |
425 | 340 | 1224 | 70 | 50 |
600 | 210 | 756 | 7 | 19 |
600 | 355 | 1278 | 21 | 32 |
600 | 410 | 1476 | 28 | 36 |
600 | 660 | 2376 | 75 | 50 |
775 | 375 | 1350 | 6 | 22 |
775 | 545 | 1962 | 14 | 32 |
775 | 715 | 2574 | 24 | 42 |
775 | 885 | 3186 | 38 | 50 |
1050 | 675 | 2430 | 11 | 30 |
1050 | 950 | 3420 | 22 | 38 |
1050 | 1225 | 4410 | 37 | 44 |
1050 | 1490 | 5364 | 55 | 50 |
Ceiling swirl diffusers with square diffuser face for high rooms in comfort and industrial zones. For supply air only. Blades in diagonally opposed sections can be adjusted for air discharge from horizontal (0°) to vertical (90°). Horizontal air discharge with high induction. For freely suspended installation or for suspended ceilings of all types.
Ready-to-install component which consists of the diffuser face with four equal blade arrays, a cross bar for fixing the actuator, a plenum box with side entry or top entry spigot, and suspension holes.
The diffuser face is fixed to the plenum box with a screw.
Spigot suitable for ducts to EN 1506 or EN 13180.
Sound power level of the air-regenerated noise measured according to EN ISO 5135.
Special characteristics
Materials and surfaces
Technical data
Sizing data
Air-regenerated noise
Order example: VD–V–E1–K/600/P1-RAL 9016
Connection | Vertical |
Adjustment | Electric actuator 230 V AC |
Attachment | Extended border |
Nominal size | 600 mm |
Exposed surface of diffuser face | RAL 9016, traffic white, gloss level 70 % |
VD-H
Variant
Nominal sizes
Parts and characteristics
Construction features
VD-V
Variant
Nominal sizes
Parts and characteristics
Construction features
VD-*-K
Accessories
Nominal sizes
Parts and characteristics
VD-*-S
Accessories
Nominal sizes
Parts and characteristics
VD-H
mm | mm | mm | mm | mm | mm | kg | |
Weights apply to the variant with actuator
VD-V
mm | mm | mm | mm | mm | kg | |
Weights apply to the variant with actuator
VD
mm | m² | m² | |
Installation and commissioning
Installation information
These are only schematic diagrams to illustrate installation details.
Principal dimensions
ØD [mm]
Outer diameter of the spigot
ØD₁ [mm]
Outer diameter of a circular diffuser face
ØD₂ [mm]
Diameter of a circular diffuser face style
ØD₃ [mm]
Diameter of a circular plenum box
□Q₁ [mm]
Outer diameter of a square diffuser face
□Q₂ [mm]
Dimensions of a square diffuser face style
□Q₃ [mm]
Dimensions of a square plenum box
H₁ [mm]
Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face
H₂ [mm]
Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot
H₃ [mm]
Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot
A [mm]
Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling
C [mm]
Length of the spigot
m [kg]
Weight
Nomenclature
LWA [dB(A)]
A-weighted sound power level of air-regenerated noise
V [m³/h] and [l/s]
Volume flow rate
Δtz [K]
Supply air to room air temperature difference, i.e. supply air temperature minus room temperature
Δpt [Pa]
Total differential pressure
Aeff [m²]
Effective air discharge area
All sound power levels are based on 1 pW.
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Tu smo za vas
Molimo Vas da navedete sadržinu poruke i vrstu zahteva
Tel.: +381 11 2622 543 | Fax: +49 (0)2845/202-265
Kontakt
Zahvaljujemo na vašoj poruci!
Vaša poruka je poslata i biće uskoro obrađena.
Naše odeljenje za servisnu podršku će Vas kontaktirati u najkraćem roku.
Za opšta pitanja u vezi proizvoda ili usluga možete takoše da pozovete:
Tel.: +381 11 2622 543 | Fax: +381 11 2624 150