Industrial fan inlet silencers are part of an intake fan system and are designed to attenuate noise developed from the fan inlet. Air filters, inlet boxes, screens, and dampers may be included as part of the complete package. The silencer may be mounted on the fan or blower inlet or a supply air duct or along a wall. Intake silencers may be tubular shaped and identified as a circular or round silencer or rectangular as determined by the inlet flange geometry. Low-pressure loss through the silencer, with expected attenuation, is the design goal and essential to keep the fan horsepower requirement as low as possible. Final silencer selection is determined based on airflow and fan sound levels, along with airstream/environmental air constituents a critical consideration.
Inlet silencers are designed and constructed to meet the exhaust system pressures and performance requirements. Many construction options are available and include:
- Metal gauges to 3/8” steel plate
- Carbon steel, stainless steels, or FRP
- Paints & coatings
- Removable baffles
- Horizontal or vertical configurations
- Inlet elbows
- Weather hoods
Integrated industrial ventilation systems, where industrial exhauster or blower noise is a contributor to overall plant noise or impacts adjoining communities, typically incorporate an intake silencer system on the fan or blower inlet. Modifications to both axial and centrifugal fan designs to meet these application requirements and noise criteria are typical design configurations offered by SysTech.