M51 Model

MAXIM SILENCER APPLICATIONS

Sizes 11/2“ to 31/2“ have MNPT connections.
Sizes 11/2“ through 10” are two chambered.
Sizes 12” and larger have three chambers.

Size A B C N O P Est. Wt.
Min. Max.
1 1/2" 7 26 1 1/2 3 11 6 1/2 24 19
2" 10 1/4 25 2 3 1/2 10 1/2 8 23 27
2 1/2" 12 36 2 1/2 4 1/2 15 1/2 9 33 1/4 45
3 14 45 3 5 1/4 21 1/4 10 42 1/2 80
3 1/2" 16 53 3 1/2 6 25 11 50 1/4 95
4" 18 64 4 6 1/2 31 12 61 1/4 200
5" 22 72 5 8 35 14 69 1/4 285
6" 26 85 6 9 41 1/2 16 82 1/2 390
8" 30 103 8 10 1/2 50 18 1/2 100 585
10" 36 118 10 12 1/2 59 21 1/2 115 860
12" 36 146 12 13 58 21 1/2 143 1250
14" 40 145 14 16 1/2 56 23 1/2 142 1525
16" 45 164 16 18 63 26 161 1/4 2150
18" 50 188 18 20 74 29 185 3450
20" 54 217 20 21 84 31 214 4075
22" 60 230 22 23 92 34 227 5050
24" 64 258 24 25 105 36 255 1/4 6075
26" 68 283 26 26 115 38 280 1/4 7325
28" 72 315 28 28 128 40 312 1/4 8225
30" 78 326 30 30 133 43 323 1/2 9250
Note: Dimensions are in inches, weights are in pounds.

Typical Applications: Features: Optional Accessories:

• Internal combustion engine
 intakes and exhausts

• Blower intakes and
 discharges

• Vacuum pump discharges

• Advanced acoustical design

• Heavy duty, all welded
 construction and long
 service life

• Easily installed in any
 position

• Prime coated exterior finish

• Backfire relief covers

• Flexible connectors

• Companion flanges

• Cleanout openings

• Side inlets

• Horizontal or vertical
 support arrangements

• Special painting

Sample Specification:
The silencer shall be a MAXIM Model M51 for best noise control for highest degree of
applications. The construction shall be heavy wall, all welded, carbon steel construction and
protected by a single coat of shop primer. The design of the silencer shall be suitable for
mounting in any position and shall be complete with the following available options:
M51 – Best Chamber Type Silencer –
Expected Attenuation is 28 to 32 dBA

Use a model M51 for the highest degree of “critical”
grade silencing for areas requiring “hospital quiet”
noise reductions. The M51 is presently the top-of
the-line silencer without resorting to multiple
silencers in series or custom designed silencers.

Use a model M41 for quiet residential areas where
background noise is relatively low and “critical”
grade silencing is required.

Example: For truly quiet residential areas where
ambient noise levels are very low and the sounds
of birds singing and the soft hum of air conditioning
 units may be the noticeable noise features.

Use a model M31 in residential areas where
background noise is present but not objectionable.
In these areas, installation of an M31 on an engine
exhaust is intended to bring the noise level down to
match the ambient noise levels.

Example: In a quieter residential areas off the
main traffic areas and away from constant noise
sources.

Use a model M21 in residential and light industrial
areas where background noise is relatively high
and constant and the need for higher degrees of
silencing is minimal.

Example: In residential neighborhoods having high
traffic or light industry with relatively constant
background noise. Residents in these areas are
typically accustomed to the noise or make some
efforts to shield themselves from the ever present
background noise . Use of an M21 can keep engine
exhaust noise within existing noise levels.