Application
Special features
Nominal sizes
Variants
Parts and characteristics
Accessories
Construction features
Materials and surfaces
Mineral wool
Standards and guidelines
Maintenance
Nominal sizes | 125 – 400 mm |
Operating pressure | 1000 Pa |
Operating temperature | 100 °C max. |
The stated differential pressures for circular silencers correspond to the values for smooth pipes. Deviations, if any, are of no practical relevance.
For ductwork calculation, if the length of a circular silencer is included in the total length of the ductwork, no extra length must be added.
CAK, insertion loss
125 | 500 | 1 | 6 | 7 | 14 | 25 | 23 | 14 | 12 |
125 | 1000 | 2 | 9 | 13 | 22 | 34 | 35 | 24 | 16 |
125 | 1500 | 3 | 12 | 19 | 31 | 42 | 43 | 33 | 20 |
160 | 500 | 0 | 3 | 5 | 11 | 22 | 21 | 12 | 10 |
160 | 1000 | 1 | 4 | 9 | 18 | 30 | 31 | 19 | 13 |
160 | 1500 | 2 | 7 | 13 | 25 | 38 | 41 | 27 | 17 |
200 | 500 | 0 | 2 | 4 | 10 | 21 | 17 | 10 | 8 |
200 | 1000 | 1 | 4 | 9 | 15 | 29 | 25 | 16 | 11 |
200 | 1500 | 1 | 6 | 12 | 21 | 36 | 33 | 20 | 14 |
250 | 500 | 0 | 2 | 4 | 9 | 19 | 13 | 9 | 8 |
250 | 1000 | 0 | 4 | 8 | 14 | 26 | 22 | 15 | 11 |
250 | 1500 | 1 | 6 | 11 | 20 | 35 | 30 | 20 | 15 |
315 | 500 | 0 | 2 | 3 | 8 | 18 | 12 | 7 | 6 |
315 | 1000 | 0 | 4 | 6 | 14 | 26 | 17 | 11 | 8 |
315 | 1500 | 1 | 6 | 9 | 19 | 34 | 23 | 15 | 10 |
400 | 500 | 0 | 2 | 3 | 6 | 14 | 8 | 6 | 4 |
400 | 1000 | 0 | 3 | 6 | 11 | 25 | 13 | 10 | 7 |
400 | 1500 | 1 | 4 | 8 | 16 | 29 | 15 | 11 | 8 |
CAK, differential pressure
125 | 50 | 180 | 2 | 2 | 4 |
125 | 95 | 342 | 4 | 6 | 10 |
125 | 120 | 432 | 6 | 10 | 14 |
125 | 145 | 522 | 6 | 14 | 20 |
160 | 80 | 288 | 2 | 2 | 2 |
160 | 155 | 558 | 2 | 6 | 8 |
160 | 195 | 702 | 4 | 8 | 10 |
160 | 235 | 846 | 6 | 10 | 14 |
200 | 125 | 450 | 2 | 2 | 2 |
200 | 245 | 882 | 2 | 4 | 6 |
200 | 310 | 1116 | 4 | 6 | 8 |
200 | 370 | 1332 | 4 | 8 | 10 |
250 | 195 | 702 | <2 | <2 | <2 |
250 | 385 | 1386 | <2 | 4 | 4 |
250 | 485 | 1746 | 2 | 4 | 6 |
250 | 580 | 2088 | 4 | 6 | 8 |
315 | 310 | 1116 | <2 | <2 | <2 |
315 | 615 | 2214 | <2 | 2 | 4 |
315 | 770 | 2772 | <2 | 4 | 4 |
315 | 925 | 3330 | 2 | 4 | 6 |
400 | 500 | 1800 | <2 | <2 | <2 |
400 | 995 | 3582 | <2 | <2 | 2 |
400 | 1245 | 4482 | <2 | 2 | 4 |
400 | 1495 | 5382 | <2 | 4 | 4 |
Plastic circular silencers for use in extract air systems subject to aggressive media; they reduce the air-regenerated noise in plastic ducts (absorption principle).
Insertion loss measured according to ISO 7235.
Absorption material is mineral wool with RAL quality mark RAL-GZ 388.
Spigot, suitable for ducts according to DIN 8077.
Casing air leakage to EN 15727, class D.
Special features
Materials and surfaces
Mineral wool
Technical data
Sizing data
Order example: CAK/200×1000
Nominal size | 200 mm |
Length | 1000 mm |
Type of connection | Spigot |
Installation and commissioning
Principal dimensions
ØD [mm]
Outer diameter of the spigot
ØD₃ [mm]
Outer diameter of circular silencers
L [mm]
Length of attenuator/silencer including spigot (in airflow direction)
L₁ [mm]
Length of acoustic cladding and acoustically effective length
B [mm]
Attenuator width and duct width (upright splitters)
H [mm]
Attenuator height and duct height (upright splitters)
T [mm]
Splitter thickness
S [mm]
Airway width
n [ ]
Number of flange screw holes
m [kg]
Weight
Nomenclature
fm [Hz]
Octave band centre frequency
LWA [dB(A)]
A-weighted sound power level of air-regenerated noise
De [dB]
Insertion loss
V [m³/h] and [l/s]
Volume flow rate
Δpst [Pa]
Static differential pressure
All sound power levels are based on 1 pW.
All values were measured in a TROX lab and to EN ISO 7235. Intermediate values may be achieved by interpolation.
Lab measurements exceeding 50 dB are indicated as 50 dB, in line with common practice.
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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
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