MSA4 Model

MAXIM SILENCER APPLICATIONS

Size A B C N O P Est. Wt.
Min. Max.
4" 18 64 4 6 31 12 61 1/4 200
5" 22 72 5 6 35 14 69 1/4 285
6" 26 85 6 9 41 1/2 16 82 1/2 370
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 1295
14" 40 145 14 16 56 23 1/2 142 1450
16" 45 164 16 18 63 26 161 1/4 2030
18" 50 188 18 20 74 29 185 2520
20" 54 217 20 21 84 31 214 3090
22" 60 230 22 23 92 34 227 3930
24" 64 258 24 25 105 36 255 1/4 4550
26" 68 283 26 26 115 38 280 1/4 6380
28" 72 315 28 28 128 40 312 1/4 7560
30" 78 326 30 30 133 43 323 1/2 8760
Note: Dimensions are in inches, weights are in pounds.

Typical Applications: Features: Optional Accessories:
• Internal combustion engine
exhausts
• High efficient spark arresting
capability
• 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 MSA4 for best noise control for highest degree applications requiring spark arresting capability. 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:

MSA4 – Best Chamber Type Spark
Arresting– Expected Attenuation is 28 to
32dBA

Use a model MSA4 for the highest degree of “critical”
grade silencing for areas requiring “hospital quiet”
noise reductions and spark arresting feature.

The MSA4 is presently the top-of-the-line silencer
without resorting to multiple silencers in series or
custom designed silencers.

MSA3 – Excellent Chamber Type Spark
Arresting– Expected Attenuation is 24 to 28
dBA

Use a model MSA3 for quiet residential areas where
background noise is relatively low and “critical” grade
silencing with spark arresting feature 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.

MSA2 – Better Chamber Type Spark
Arresting– Expected Attenuation is 21 to 24
dBA

Use a model MSA2 in residential areas where
background noise is present but not objectionable and
spark arresting feature is desired. In these areas,
installation of an MSA2 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.

MSA1 – Good Chamber Type Spark Arresting– Expected Attenuation is 17 to 20 dBA

Use a model MSA1 in residential and light industrial
areas for spark arresting capability 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 MSA1 can keep engine exhaust noise
within existing noise levels.