35

 

30

 

25

 

20

dB

15

 

10

 

5

31,5     63    125    250    500    1K        2K     4K     8K

Frequency (Hz)

Dimensions :

Text Box: B
Text Box: A

S.C. Hu-tec Engineering S.R.L.

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SILENCERS TYPE NRS

Specification:

 

NRS type silencers are reactive silencers and are in general used for attenuation in the lower frequencies, mainly in combination with the NAS type. This silencer is optionally available with an integrated spark arrester. These silencers can be mounted in both horizontal and vertical way. Recommended gas speed max. 60 m/s, maximum temperature 600 °C.

In general, the silencers are manufactured in mild steel (S 235 JR G2) and provided with a black heat resistant silicon coating. The silencers are optionally also available in other material such as  stainless steel 304, 316 and 321.

 

Attenuation silencer: (measured on a 6” system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The pressure drop of the silencer is depending of the exhaust flow (gas velocity) through the silencer.

With the help of below mentioned formula it is  easy to calculate the pressure drop.

If required we will give additional detailed information.

In case of strict noise level and/or limited dimensions, it is often not possible to work with a standard silencer. 

The know-how of acoustics and flow dynamics of our technical department, enables us to design a silencer for a specific sound-source, which results in a optimum noise reduction for that specific situation.

 

Pressure drop calculation:

Nominal Bore

050

065

080

100

125

150

200

250

300

350

400

450

500

A (mm)

60,3

76,1

88,9

114,3

139,7

168,3

219,1

273,0

323,9

355,6

406,4

457,2

508,0

B (mm)

250

300

300

400

400

480

600

700

800

950

950

1100

1200

C (mm)

750

750

1000

1250

1500

1500

1750

2250

2500

3000

3500

4000

4500

D (mm)

900

900

1250

1500

1750

1750

2000

2500

2750

3250

3750

4250

4750

Weight (± in kg)

25

35

40

80

90

130

200

300

400

625

800

1250

1500