| System Components > Sound Abatement
Sound levels must
be maintained at safe levels to avoid employee hearing losses.
Pneumatic conveying systems use fans and/or blowers to generate the air
for the systems to operate, creating noise. In addition, systems using
choppers or cutters contribute to sound pollution. The dBA or sound
level of these components is considered when designing systems and you
are given the option of adding sound abatement to the system.
Silencers
are fabricated with a solid outer shell and acoustical insulation to
reduce the sound level. Fans and choppers/cutters typically have an in-line silencer positioned both at their inlet and outlet points. Pressure blowers use a capped silencer positioned at the air inlet point.
Acoustical jackets
muffle the sound of choppers/cutters, fans and blowers. Made of 2”
thick acoustical composite material it typically reduces sound levels
10-12 dBA at 3 feet.
Sound enclosures position the
chopper/cutters, fans, or blowers in a room constructed of heavy duty
sound suppression materials. Ideal for multiple prime movers located
close together (whose sound levels can actually exponentially increase
due to their close proximity) these sound enclosures typically reduce
the sound levels 15-20 dBA at 5 feet.
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| This sound enclosure room houses the fans, keeping the sound level at a minimum. Notice in the photo below-left, both the inlet and outlet of each fan has a silencer added in the duct run. Louvers in the sidewall of the room prevent heat build-up. |
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