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Aerodynamic Noise Control

Aerodynamic Noise Control valve technologies used to reduce the noise (sound pressure level) of compressible flows either shifting frequencies, discrete pressure staging, trim passage shape and/or adequate expansion areas.

Aerodynamic Noise Control Valves

Fisher® FB & FBG Fabricated Angle and Globe Valves
Instruction Manual Product Bulletin
Fisher® FB and FBG fabricated angle and globe valves are used with compressible fluids on special applications requiring maximum noise attenuation capability and high capacity. Typical applications include main steam reducing valves and compressor bypass valves. FB and FBG valves are also commonly used for sour gas applications in petrochemical and gas processing plants.
Fisher® V260 Full Bore Pipeline Control Valve
Instruction Manual Product Bulletin
Fisher® V260 is a full bore pipeline control valve designed for optimized pressure and flow control for ANSI 300 and 600 applications. An integral drilled attenuator controls noise and vibration from high-pressure drop liquids and gases. The splined shaft connection to the actuator eliminates lost motion allowing for precise control. The V260A with Aerodome attenuator, V260B with Hydrodome, and V260C ball control valves combine the efficiency of a rotary valve with the energy-dissipating capability of a special trim to provide improved performance for demanding capabilities. The valve is available with single, dual or dual block-and-speed seal options. The V260 full-bore ball valve is available with composition or metal seals, and process type stem packing for improved life. The preferred actuator for V260 is the 1061. The Bettis™ Scotch Yoke actuator is used when spring return capability is needed.

Aerodynamic Noise Control Silencer

PULSCO Blowdown Vent Silencers & Line Silencers
PULSCO blowdown vent silencers and line silencers provide the solution to high intensity, broadband noise associated with pressure relief systems and gas/steam line turbulence. The PULSCO design reduces low frequency noise by converting it to high frequency waves through multiple expansions and contractions pressurized diffuser and plenum sections. High frequency noise is then easily absorbed by the acoustic packing in the tube module.

Aerodynamic Noise Control Trim

Fisher® Wisper TrimTM I Cage
Product Bulletin
Whisper Trim™I cage offers proven aerodynamic noise control that is effective for vapor, gas, or steam flow applications.

Typical Application: Hydrocarbon: Rich Amine Letdown, Vent to Flare, Regeneration Gas Compressor
  Power: LP Steam Vent
Fisher® Wisper TrimTM III
Instruction Manual Product Bulletin
Whisper Trim™III cages provide effective attenuation of aerodynamic noise in vapor, gas, or steam applications involving high pressure drops or high pressure drop ratios.

Typical Application: Hydrocarbon: Compressor Anti-Surge, OverHead Stripper Gas, Vent to Flare, Gas Pipeline Transmission
  Power: HP Steam Vent, Turbine Bypass, Sootblower
Fisher® WisperFloTM Trim
Product Bulletin
WhisperFlo™ trim represents state of the art solutions for applications that demand ultimate noise attenuation.

Typical Application: Hydrocarbon: Compressor Anti-surge, Steam Vent, Vent to Flare, Flare Header, Reactor Backpressure
  Power: HRH Turbine Bypass, LP Steam to Condenser, MR Compressor, IP Turbine Bypass

Aerodynamic Noise Control Vent Diffusers

Fisher® 6012 Vent Diffuser
Product Bulletin
The Fisher® 6012 Vent Diffuser offers proven noise attenuation in steam, gas, or vapor venting applications. A vent diffuser places back pressure on the control valve while venting process to the atmosphere.

The Fisher vent diffuser shares the total system pressure drop with the vent valve. The benefits are:
           1) the vent valve noise is reduced and
           2) the noise at the atmospheric vent point is reduced.

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