EMERSON
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Fisher™ WhisperFlo™ Aerodynamic Noise Attenuation Trim

Fisher WhisperFlo trim represents state-of-the-art solutions for applications that demand noise attenuation. Control valves with WhisperFlo trim provide additional attenuation for aerodynamic noise in very demanding vapor or gas applications with high pressure drops. A WhisperFlo cage with an appropriately sized valve body is designed to reduce the noise level up to -40 dBA. For special applications, -50 dBA attenuation can be achieved

Key Features

  • Use of WhisperFlo trim provides excellent noise attenuation for very demanding applications. It should be considered for those applications that more conventional solutions cannot reach.
  • Quick change trim allows fast and easy inspection of the cage without taking the valve body out of the line. WhisperFlo trim is interchangeable with standard control valve trim.
  • Hardened materials or a unique wear surface construction are standard to provide excellent wear resistance. The three dimensional flow path, pressure-staging, and special passage shapes uniquely combine to equalize energy dissipation.
  • WhisperFlo trim has higher capacity at conventional valve travels and port sizes than tortuous path designs.
  • Standardized port sizes provide capability to retrofit existing valves.
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