Suction Silencer

Suction silencers can be rectangular or cylindrical in construction. The circular silencer is made of concentric  annular  acoustic  cylinder  enclosed  in  a  robust  steel  casing  with  transition  cone  or dished end at both ends  with  inlet  and  outlet  nozzles. The  air/ gas  enters  the  silencer  and  passes through  the  annular  space  between  the  concentric  annular  acoustic  cylinders  where  the  sound energy  is  absorbed. The straight flow path through annular acoustic cylinder ensures minimum pressure drop. Either steel, galvanized  steel  or  stainless  steel  is  provided  for  internals  based  on  the customer’s choice.

The suction silencer is used to reduce the suction noise of the compressor/ blower. It is constructed in circular shape.

The fluid passes through the annular space of the acoustic packing where the sound energy is absorbed. The  straight  flow path through annular acoustic cylinder ensures minimum pressure drop.

The  following   data  are  required to  design  Suction  Silencer  :

  • Flow rate
  • Temperature
  • Inlet size
  • Allowable pressure drop
  • Silenced noise level requirements

When air or steam or any other medium is sucked into the compressor, it causes a lot of noise. Suction silencer is a type of vent silencer specifically used to reduce such noise at the suction side of the compressor. Depending on the pressure drop requirement of the customer, design of diffuser and muffler are optimized. Design of a suction silencer is very similar to that of a discharge silencer.