Perforated Diffuser
Instruction Manual
Description
PCS is a circular diffuser wan with an integrated box for visible installation. The diffuser has a perforated face plate and can be used for both supply and extract air. The diffuser has a built-in damper and a measuring device for adjustment. PCS is equipped with an M8 threaded rod at the top for suspending the diffuser. The diffuser is suitable for the horizontal supply of cooled air.
- Can be used for both supplies and extracting air.
- Can be connected regardless of straight ducting before the diffuser.
- Supplied with integrated M8 rivet nut for suspension.
- Detachable damper for cleaning of duct.
Maintenance
The face plate can be detached and the damper removed to enable cleaning of the internal parts or the duct. The visible parts of the diffuser can be wiped with a damp cloth. Order cod
Dimensions
| Size[mm] | ØD [mm] | Ød1 [mm] | L[mm] | H[mm] | Weight ]kg] |
| 125 | 240 | 125 | 340 | 215 | 4,6 |
| 160 | 300 | 160 | 360 | 260 | 6,9 |
| 200 | 360 | 200 | 390 | 300 | 9,6 |
| 250 | 460 | 250 | 420 | 350 | 11,4 |
| 315 | 540 | 315 | 460 | 420 | 11,4 |
Materials and finish
| Material: | Galvanised |
| Standard finish: | Powder-coated |
| Standard color: | White, RAL 9003 or 9010, loss 30 |
The diffuser is available in other colors or unpainted. Please contact Lindab’s sales department for further information.
Perforated diffuser
Technical data
Capacity
Volume flow qv [l/s] and [m 3 /h], total pressure Δpt [Pa], throw l0.2 [m] and sound power level LWA [dB(A)] can be seen in the diagrams.
The frequency-related sound effect level
The sound effect level in the frequency band is defined as LWA + Kok Kok values are given in charts beneath the diagrams on the following pages.
Quick selection
Supply air
| Minimum Pi=5 Pa | pt=50 Pa LWA=30dB(A) | pt=50 Pa LWA=35dB(A) | ||||
| Size | l/s | m3 /h | l/s | m3 /h | l/s | m3 /h |
| 125 | 20 | 73 | 30 | 106 | 36 | 131 |
| 160 | 34 | 122 | 48 | 173 | 59 | 212 |
| 200 | 53 | 190 | 65 | 235 | 81 | 292 |
| 250 | 79 | 286 | 109 | 393 | 135 | 484 |
| 315 | 121 | 437 | – | – | 188 | 675 |
Extract
| Minimum Pi=5 Pa | pt=50 Pa LWA=30dB(A) | pt=50 Pa LWA=35dB(A) | ||||
| Size | l/s | m3 /h | l/s | m3 /h | l/s | m3 /h |
| 125 | 20 | 73 | 30 | 104 | 43 | 156 |
| 160 | 34 | 122 | 48 | 117 | 62 | 222 |
| 200 | 53 | 190 | 65 | 225 | 104 | 376 |
| 250 | 79 | 286 | 109 | 391 | 146 | 525 |
| 315 | 121 | 437 | – | – | 191 | 687 |
Throw l0.2
The throw is specified at a terminal velocity of 0.2 m/s.
Sound attenuation
Sound attenuation of the diffusers ΔL from duct to room, including end reflection, see table below.
| Center frequency Hz | ||||||||
| Size | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| 125 | 21 | 16 | 6 | 19 | 14 | 12 | 11 | 17 |
| 160 | 15 | 11 | 9 | 21 | 15 | 12 | 13 | 16 |
| 200 | 12 | 8 | 6 | 15 | 15 | 9 | 11 | 14 |
| 250 | 19 | 15 | 12 | 17 | 12 | 9 | 11 | 14 |
| 315 | 16 | 13 | 11 | 14 | 12 | 9 | 12 | 13 |
Balancing
Balancing data is contained in a separate brochure.
Technical data
Supply air
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 6 | 3 | 1 | -4 | -5 | -10 | -15 | -17 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 6 | 3 | -1 | -4 | -5 | -9 | -16 | -17 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 3 | 0 | -2 | -3 | -4 | -9 | -17 | -19 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 6 | 3 | 2 | -3 | -6 | -10 | -13 | -16 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 5 | 2 | 0 | -6 | -5 | -8 | -13 | -18 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 7 | 4 | -1 | -3 | -4 | -9 | -15 | -19 |
Supply air
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 4 | 1 | -3 | -3 | -4 | -9 | -17 | -18 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 5 | 2 | -2 | -1 | -5 | -11 | -17 | -16 |
Extract air
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 8 | 5 | -2 | -3 | -5 | -9 | -14 | -16 |
| Hz | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
| Kok | 6 | 3 | -4 | -3 | -4 | -8 | -16 | -22 |
Lindab reserves the right to make changes without prior notice
2020-12-16
