Portable Grain Dryer Noise Suppression System
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Features:

Self supporting, galvanized and powder coat steel outer construction for long life

High tech noise absorption material provides for maximum noise reduction, reducing the perceived noise from our previous design by 50%

Designed and sized to not reduce air delivery by the fan to maintain rated capacities

Easy to install with minimal time and effort

Reduces decibels at 15' from 93dB to 82dB, lowering noise to less than 15% of the original level

Quieter than competitive dryers with centrifugal fans by 3dB, which is half the perceived noise

Retrofit-able to all previous GSI and Farm Fans axial fan dryers

Allows use of axial fans which are over 30% more efficient at delivering air than a centrifugal fan, while increasing motor life significantly by reducing the start up load and time

Open top and bottom allows for easy service and maintenance of the fans and motors. Does not interfere with any other dryer operations

Portable Grain Dryer Noise Suppression System

GSI’s standard low speed 1725 rpm blades make GSI axial fan dryers much quieter than in the past at a level that OSHA allows for continuous 6 hour exposure 15’ away. Though most situations do not require the Noise Suppression System those that want their dryer to be ultra quiet, even quieter than the competitive centrifugal fan models, the system will reduce the noise level at 15’ to one fourth the OSHA 8 hour exposure limit.

Simple Assembly and Installation
Noise Suppression System assembly only takes about 1.5 hours of installation time per fan. Minimal bolted connections.

Better Noise Reduction
Noise levels 3 dB's lower than previous suppression system at a distance of 15 feet. The dB scale is logorithmic. 3 dB's reflect a half reduction in noise level.

Noise Level Chart

125 dB:   Threshold of pain, pneumatic riveter at 4'
115 dB:   Loud rock music
100 dB:   Subway train, loud motorcycle
95 dB:   Level that sustained exposure may result in hearing loss
85 dB:   City traffic (inside car)
60-70 dB:   Normal conversation at 3-5'


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