CKA Square Perforated Diffuser
Instruction Manual
Description
Comdif CKA is a square perforated displacement diffuser for installation against a wall or column. Behind the perforated front plate, CKA is equipped with individually adjustable nozzles, making it possible to alter the geometry of the near zone. The diffuser can be turned and has a circular duct connection (MF measure), so the diffuser can be connected at the top or bottom. The diffuser is suitable for the supply of large volumes of moderately cooled air.
- The diffuser is suitable for the supply of large volumes of air.
- The geometry of the near zone can be adjusted using adjustable nozzles.
- Plinths can be supplied as accessories.
Maintenance
The front plate can be removed from the diffuser, making it possible to clean the nozzles. The visible parts of the diffuser can be wiped with a damp cloth.
Ordering example
Order – accessories
Plinth: CKAZ – 2 – size
Dimension
| Size | A [mm] |
OD [mm] |
H [mm] |
Weight [kg] |
| 2010 | 300 | 200 | 980 | 11.0 |
| 2510 | 400 | 250 | 980 | 20.0 |
| 3110 | 500 | 315 | 980 | 30.0 |
| 4015 | 500 | 400 | 1500 | 45.0 |
| 5020 | 800 | 500 | 2020 | 150 |
| 6320 | 800 | 630 | 2020 | 150 |
Accessories
Can be supplied with plinth.
Materials and finish
| Diffuser: | Galvanised steel |
| Nozzles: | Black plastic |
| Front plate: | 1 mm galvanised steel |
| Standard finish: | Powder-coated |
| Standard colour: | RAL 9003 or RAL 9010 – white, gloss 30 |
The diffuser is available in other colours. Please contact Lindab’s sales department for further information.
Perforated diffuser – square
Technical data
Recommended maximum volume flow.
The near zone is given at an under-temperature of -3 K to a maximum terminal velocity of 0.20 m/s.
Conversion to other terminal velocities – see table 1, correction of the near zone for -3 K and -6 K respectively.
Sound effect level
Sound effect level LW [dB] = LWA + Kok
Centre frequency Hz
| Size | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| 2010 | 10 | 0 | 4 | 0 | -8 | -18 | -29 | -43 |
| 2510 | 11 | 1 | 4 | -1 | -8 | -19 | -30 | -42 |
| 3110 | 14 | 3 | 4 | -1 | -10 | -18 | -30 | -32 |
| 4015 | 10 | 1 | 2 | 0 | -8 | -17 | -27 | -42 |
| 5020 | 7 | 3 | 2 | 0 | -6 | -16 | -19 | -17 |
| 6320 | 7 | 3 | 2 | 0 | -6 | -16 | -19 | -17 |
Sound attenuation
Sound attenuation ΔL [dB] including end reflection.
Centre frequency Hz
| Size | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| 2010 | 12 | 8 | 4 | 2 | 1 | 1 | 1 | 1 |
| 2510 | 10 | 6 | 6 | 4 | 2 | 2 | 4 | 3 |
| 3110 | 10 | 7 | 3 | 1 | 2 | 1 | 2 | 1 |
| 4015 | 9 | 6 | 1 | 1 | 1 | 1 | 1 | 1 |
| 5020 | 6 | 4 | 1 | 1 | 1 | 1 | 1 | 1 |
| 6320 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 1 |
Nearline
Table 1
Correction of the near zone (a0.2, b0.2)
| Under temperature Ti – Tr |
Maximum velocity m/s |
Mean velocity m/s |
Correction factor |
| -K3 | 0.20 0.25 0.3 0.35 0.40 |
0.10 0.12 0.15 0.17 0.20 |
1,00 0.80 0.70 0.60 0.50 |
| -6K | 0.20 0.25 0.30 0.35 0.40 |
0.10 0.12 0.15 0.17 0.20 |
1.20 1,00 0.80 0.70 0.60 |
Lindab reserves the right to make changes without prior notice
2022-08-17
Documents / Resources
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Lindab CKA Square Perforated Diffuser [pdf] Instruction Manual CKA, Square Perforated Diffuser, CKA Square Perforated Diffuser, Perforated Diffuser, Diffuser |
