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Silencers

For many years Bevent Rasch has developed and manufactured silencers for ventilation systems. We have delivered products to most types of projects: offices, schools, hospitals, laboratories, industries, housing and thus have vast experience of different products for different applications. All silencers are manufactured in Sweden in our modern factory in Motala and can be customised by our design department. The insertion attenuation of our silencers is measured at SP Technical Research Institute of Sweden and KTH Royal Institute of Technology.


Step 1 – Sizing

Get suggestions for suitable products based on desired values or select a specific product.

Suggest suitable products

Select a specific product

MANDATORY (Fill in the air flow in l/s or m3/h and maximum pressure drop)::

Air flow

l/s
m3/h

Maximum pressure drop

Pa

OPTIONAL

Select the desired shape

Rectangular
Circular

NB: Rectangular can also be square. If no fixed width or height is selected, a square size will be suggested.

Size

Width mm
Height mm
Ø mm

Maximum length

mm

Sound power level (Lw) before the silencer

Octave band, Hz

63

125

250

500

1000

2000

4000

8000

Installation options

Before

After

LD

Air direction

Suggest suitable products

Select a specific product

LFAR

LFAR

Extensible baffles for good cleanability

LFIK

LFIK

Standard straight silencer with indented duct connection

LFIV

LFIV

Duct bend silencer with indented duct connection

LFAL

LFAL

Low build duct silencer for confined spaces

LFAC

LFAC

Circular duct silencer

LFAS

LFAS

Rectangular duct silencer with circular connection

LFAS-L

LFAS-L

Extremely low build for embedding in flat substrate or with a lack of space

MANDATORY (Fill in the air flow in l/s or m3/h and maximum pressure drop)::

Air flow

l/s
m3/h

Maximum pressure drop

Pa

OPTIONAL

NB: Rectangular can also be square. If no fixed width or height is selected, a square size will be suggested.

Size

Width mm
Height mm
Ø mm

Maximum length

mm

Sound power level (Lw) before the silencer

Octave band, Hz

63

125

250

500

1000

2000

4000

8000

Installation options

Before

After

LD

Air direction

Step 2 – Suitable products

The following products meet the values you have chosen. Select the product to complete your sizing.

Is within the selected maximum pressure drop

Is not within the selected maximum pressure drop

Unfortunately, no suitable products were found