Circular silencer - no core

Round silencers or circular silencers are built from noise absorbing materials that reduce noise in round tube systems without significant pressure loss.

There are two types of circular silencers. With and without core.

HNA silencers were tested at 400C for two hours and found durable.

Silencers intended to run alongside bellows will be supplied with forge nuts to match custom deep flange holes in the blower

Model

D mm

B mm

SOUND ATTENUATION FOR L = 1D

 Vs. FREQUENCY (dB)

SOUND ATTENUATION FOR L = 2D

 Vs. FREQUENCY (dB)

8K

4K

2K

1K

500

250

125

63

8K

4K

2K

1K

500

250

125

63

RDS-NP-315

315

465

6

6

11

13

9

6

5

2

9

10

16

17

14

9

7

3

RDS-NP-400

400

550

6

6

11

13

9

6

5

2

9

10

16

17

14

9

7

3

RDS-NP-500

500

650

6

6

11

13

9

6

5

2

9

10

16

17

14

9

7

3

RDS-NP-560

560

710

6

6

11

13

9

6

5

2

9

10

16

17

14

9

7

3

RDS-NP-630

630

780

7

8

10

15

13

8

6

3

9

11

14

18

17

11

8

5

RDS-NP-710

710

860

7

8

10

15

13

8

6

3

9

11

14

18

17

11

8

5

RDS-NP-800

800

950

7

8

10

15

13

8

6

3

9

11

14

18

17

11

8

5

RDS-NP-900

900

1050

7

8

10

15

13

8

6

3

9

11

14

18

17

11

8

5

RDS-NP-1000

1000

1150

7

8

10

15

13

8

6

3

9

11

14

18

17

11

8

5