Lindab KVAPL Circular Straight Low-Built Silencer Instructions

June 4, 2024
Lindab

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Circular straight low-built silencer KVAPL

Lindab KVAPL Circular Straight Low Built Silencer

Description

KVAPL is a rectangular attenuator with circular connections and a low installation height.
Attenuation material is mineral wool covered with the textile to prevent fibers from coming out. The KVAPLs are made from galvanized steel sheets. The attenuator can be cleaned by rotating nylon brushes, a vacuum cleaner, or a damp cloth.
The openable model; can be used as a cleaning door and possibly to replace the acoustic infill.
Fulfills tightness class C.
Tested according to ISO 7235 standard.
Perforated sheet on top of the acoustic material, special materials, sizes, and flanges on request. Please contact Lindab sales.
The KVAPL comes in two different designs.

Model:
3.= Attenuator with mineral wool attenuation material.
4.= Openable Attenuator with mineral wool attenuation material.
To select the appropriate attenuator and optimize connection size and length for the best performance, please use our online tool Lindquist Visit www.lindQST.com to find out more.

Order code

Lindab KVAPL Circular Straight Low Built Silencer -
fig5

Example: KVAPL 200 – 1000 – 3

Dimensions and sound data

KVAPL model 3 & 4

Lindab KVAPL Circular Straight Low Built Silencer -
fig4

Insertion loss [dB] for centre frequency [Hz] Model
Ød l
[nom] [mm]
100 300
100 600
100 1000
125 300
125 600
125 1000
160 300
160 600
160 1000
200 300
200 600
200 1000
250 600
250 1000
315 600
315 1000
400 600
400 1250
500 600
500 1250
630 600
630 1250

Model 3 and 4
Pressure loss and sound generation for 300 mm long attenuators

Lindab KVAPL Circular Straight Low Built Silencer -
fig3

Model 3 and 4
Pressure loss and sound generation for 600 mm long attenuators

Lindab KVAPL Circular Straight Low Built Silencer -
fig1

Model 3 and 4
Pressure loss and sound generation for 1000 and 1250 mm long attenuators (Ød1 400 – 630 → (l) = 1250 mm)

Lindab KVAPL Circular Straight Low Built Silencer -
fig2

Kwoct correction tables model 3 and 4.

Ød1 Correction, Kwoct (dB) for center frequency [Hz]
[mm] 63

8k
63| 1| 5| 1| -2| -5| -14| -20| -31
80| 0| 3| 2| -1| -7| -12| -17| -28
100| 2| 5| -1| 1| -9| -19| -24| -42
125| 7| 6| 2| 0| -9| -15| -21| -41
160| 8| 3| 1| 0| -8| -14| -19| -37
200| 4| 4| 4| -1| -9| -13| -20| -31
250| 5| 3| 1| -2| -5| -10| -16| -28
315| 7| 5| 2| -3| -5| -11| -17| -30
400| 10| 6| 2| -2| -6| -13| -21| -27
500| 6| 6| 2| -2| -6| -14| -22| -39
630| 7| 7| 2| -2| -6| -15| -22| -40
Tol.+/-| 3| 3| 2| 3| 3| 4| 4| 5

Sound power levels per octave band Lwoct is calculated by adding the octave band corrections Koch to the total power level Lwa from the graphs.
Lwoct = LwA + Koct

Lindab logoLindab reserves the right to make changes without prior notice
2022-03-04

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