300 LEVEL EXHAUST SILENCERS

flange “F” Mounting Flange:
Standard in sizes 4” to 22”. Drilling matches 125/150# ASA standard.
pipe-threads “P” Male Pipe Threads:
NPT ends offered in sizes 3/4″ through 4”.

Companion flanges available for 4” to 22”.

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Application:
These silencers are recommended where ambient noise is low and a high degree of silencing is necessary.

Construction:
Aluminized Steel: Nelson Silencers through 26” O.D. are fabricated of aluminized steel as standard materials. This material has a maximum operating temperature of 1250°F.

Mild Steel/Aluminized Steel: Nelson Silencers 30” O.D. and larger are fabricated of mild steel and aluminized steel. All silencers 30” O.D. and larger have aluminized steel bodies with all other components fabricated from mild steel.

Silicone Aluminum Paint: Nelson Silencers through 26” O.D. are given a coat of high heat resistant silicone aluminum paint.

Primer/Silicone Aluminum Paint: Nelson Silencers 30” O.D. and larger are given a coat of high heat, rust inhibiting primer and then a top coat of high heat resistant silicone aluminum paint. Physical properties are maintained up to 900°F* on aluminized steel and 1100°F* on mild steel.

line-chart
Note: When figuring pressure drop for side inlet add 3″ H2O to back pressure shown on above curve.  *Estimated

Description

Part Number

A

Nominal Inlet Diameter

B

Body Dia. O.D.

C

Body Length

D

Overall Length

E

Offset To C/L

F

Offset To C/L

G

Inlet Length

41307

0.75

4.2

21.3

23.8

0

0.0

1.3

41310*

1.00

5.0

23.4

27.0

0.75

0.7

1.8

41313

1.25

6.1

27.5

31.2

0

0

1.8

41315

1.50

8.1

30.7

34.6

0

0

1.9

41320

2.00

9.0

40.8

44.0

0

0

1.6

41325

2.50

10.1

47.2

52.0

0

0

2.4

41330

3.00

11.1

49.5

55.6

0

0

3.1

41335

3.50

12.1

51.3

57.0

0

0

2.3

41340*

4.00

12.1

58.3

64.0

1.82

1.80

2.9

41350*

5.00

14.1

63.5

71.4

2.6

2.56

4.0

41360*

6.00

16.1

72.0

80.8

2.00

2.00

4.4

41380

8.00

22.1

78.7

86.0

0

0

3.7

41382

10.00

26.2

79.7

87.0

0

0

3.7

41384

12.00

30.2

104.8

112.0

0

0

3.6

41386

14.00

42.2

108.2

115.0

0

0

3.4

41388

16.00

42.2

156.2

163.0

0

0

3.4

41389

18.00

48.2

133.9

139.9

0

0

3.1

41321

20.00

54.3

159.6

165.5

0

0

3.3

41322

22.00

60.3

161.3

166.8

0

0

2.8

Data on larger sizes available on request.

 

Part Number

A

Nominal Inlet Diameter

B

Body Dia. O.D.

C

Body Length

D

Overall Length

E

Offset To C/L

F

Offset To C/L

G

Inlet Length

H

Outlet Length

43320

2.0

9

40.8

42.4

3.9

0

2.0

1.6

43325

2.5

10.1

46.6

49.3

3.8

0

2.5

2.7

43330

3.0

11.1

50

52.8

4.5

0

3.0

2.8

43335

3.5

12.1

51.4

54.2

5.2

0

3.0

2.8

43340

4.0

12.1

58.4

61.2

5.7

1.8

3.0

2.8

43350

5.0

14.1

63.5

67.4

5.8

2.6

4.0

3.9

43360

6.0

16.1

72

76.4

6.5

3.1

4.0

4.4

43380

8.0

22.1

78.7

82.3

11.3

0

4.0

3.6

43382

10.0

26.2

79.9

83.4

12.9

0

4.0

3.5

43384

12.0

30.2

104.8

108.4

14.4

0

4.0

3.6

43386

14.0

42.2

108.2

111.6

16.1

0

4.0

3.4

43388

16.0

42.2

156.2

159.6

16.1

0

4.0

3.4

43399

18.0

48.2

134

137.0

19.9

0

4.0

3.0

43321

20.0

54.3

159.7

162.9

22.1

0

4.0

3.2

43322

22.0

60.3

161.3

164.1

22.6

0

4.0

2.8

Part Number

A

Nominal Inlet Diameter

B

Body Dia. O.D.

C

Body Length

D

Overall Length

E

Offset To C/L

F

Offset To C/L

G

Inlet Length

H

Outlet Length

44740

4.0

12.1

58.4

61.2

29.2

1.8

3.0

2.8

44750

5.0

14.1

63.6

67.5

31.8

2.6

4.0

3.9

44760

6.0

16.1

72.0

76.4

36

3.1

4.0

4.4

44780

8.0

22.1

78.7

82.3

39.3

0

4.0

3.6

44782

10.0

26.2

79.9

83.4

39.9

0

4.0

3.5

44784

12.0

30.2

104.8

108.4

52.4

0

4.0

3.6

44786

14.0

42.2

108.2

111.5

54.1

0

4.0

3.3

*Inlet and outlet offset from centerline of silencer as shown in dimension E and F.

Drains are standard on all silencers with a 9” body diameter or larger.

Note: Specifications are subject to change without notice.
Note: All dimensions are in inches.

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