Silencers

To reduce noise at the inlet or outlet of the fan, ACOVENT offers both rectangular silencers with sound-absorbing baffles and cylindrical silencers. Depending on the customer's construction requirements, the silencers can be made of carbon steel, galvanized steel, or stainless steel.

RECTANGULAR SILENCERS

The RS rectangular silencers are designed to reduce the noise of centrifugal fans and can be installed both on the intake and discharge sides. The standard construction includes:

  • Silencer casing in galvanized sheet metal of appropriate thickness, complete with connection flanges
  • Fixing of the baffles with screws or rivets
  • 200 mm thick sound-absorbing baffles, consisting of a mineral wool panel covered with a black glass veil and a galvanized expanded mesh
  • The space between the baffles can be 100 mm (RS-A), 150 mm (RS-B), or 200 mm (RS-C)
  • Lengths ranging from 500 to 3000 mm
  • The maximum allowable fluid speed through the baffles is 20 m/s, while the recommended speed is 15 m/s
  • The maximum fluid temperature is 100°C

The RS series silencers can be supplied with the casing in painted black sheet metal with special surface treatments, stainless steel, and aluminum. Connection fittings are available for connecting the silencers to the fan inlets.

CYLINDRICAL SILENCERS

The CS cylindrical silencers are designed to reduce the noise of both centrifugal and axial fans and can be installed both on the intake and discharge sides. The silencers are provided with the same DN (Nominal Diameter) in three lengths L, called 10, 15, and 20, which represent the ratios (L/DN = 1; L/DN = 1.5; L/DN = 2). The silencers are available with diameters ranging from 250 mm to 1600 mm. They can be supplied in two versions: CSNP (without central ogive) and CSWP (with central ogive). The standard version of the CS silencers is composed of:

  • Frame in galvanized steel thickness 0.8 mm up to diameter 1250 and 1.2 mm for the remaining sizes
  • Mounting flange with threaded inserts
  • Flange drilling in accordance with EUROVENT standards
  • Sound-absorbing material in rock wool density 70 kg/m3 coated against disintegration with black glass veil, fire resistance class M0, and micro-perforated mesh for air speeds up to 20 m/s
  • Insulation thickness from 70 to 100 mm depending on size
  • Operating temperature up to 150°C

The CS series silencers can be supplied with the casing in painted black sheet metal with special surface treatments, stainless steel, and aluminum. Connection fittings are available for connecting the silencers to the fan inlets.