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IAC Boët Stopson - Acoustic Solutions for Industrial Applications and the Power Sector

IAC Boët Stopson designs, manufactures and installs acoustic solutions for industrial applications and the power sector, in particular, world-wide. Thanks to continuous investment in research and development fields for on-going technological innovation, more than 70% of our products that are available at any one time have been developed over the previous five years.

Customer satisfaction and quality are priorities at IAC Boët Stopson. Our experts in acoustics, mechanics, aero- and thermodynamics provide service at a local level world-wide, while our systems for project management, design and manufacture all either meet or exceed the ISO 9001 Quality Assurance standard.

From individual dedicated noise control solutions to full turnkey packages, IAC Boët Stopson provides noise solutions that work. Our experience gained through several thousand installations makes IAC Boët Stopson your ideal partner for noise attenuation in the power arena.

Power generation

IAC Boët Stopson provides both turnkey and discrete noise control solutions for power projects.

Turnkey projects include solutions for:

  • Co-generation installations
  • Combined-cycle plants
  • Back-up installations

Discrete equipment supplied as noise solutions for:

  • Industrial and high-power gas turbines (up to 3,250MW)
  • Steam turbines
  • Diesel engines (up to 2MW)
  • Gas engines (up to 2MW)
  • Generators (25MW to 150MW)
  • Boilers and HRSG
  • Hot and cold chimneys and by-pass stacks

IAC Boët Stopson's approach to this market focuses on providing an acoustic response to requirements that delivers both value for money and functionality.

Our enclosure installations offer the following user benefits:

  • Reduction in noise pollution
  • Safety of personnel
  • Air cooling of items of equipment
  • Easy maintenance
  • Easy access

Admission and discharge benefits:

  • Admission of air for combustion
  • Filtration of air
  • Discharge of exhaust gases
  • Intake and discharge of ventilation air

Gas turbines

IAC Boët Stopson provides full turbine packages, which include:

  • Turbine enclosures
  • A complete inlet system including filtration
  • A complete exhaust line including primary silencer and/or by-pass silencer and HRSG silencer

A dedicated IAC Boët Stopson design team develops the most cost-effective and reliable solution for each project, whether comprising one element of the above or a whole solution.

Main and associated functions:

  • Noise reduction
  • Filtered, cooled or heated GT intake
  • Turbine cooling/enclosure ventilation
  • Full exhaust system
  • Safety system
  • Active parts protection
  • Heavy-duty maintenance
  • Easy access for operators
  • Pipe-work, cables and fire network integration
  • Interface with machine
  • Resistance to environmental conditions (wind, explosions etc)

IAC Boët Stopson excels in:

  • Filtration, ventilation, aerodynamics, noise – all with mechanical & life guarantees
  • Low pressure loss, cooling/anti-icing of induced air for GT efficiency
  • Large range of insertion loss (up to 50dB)
  • Low pressure drop exhaust systems
  • Material and thermal insulation at high temperatures (550°C to 600°C)
  • On-base and off-base design enclosures
  • Gas turbine interfacing

Diesel and gas engines

These installations are equipped with:


  • Large range of standard exhaust silencers available from stock (15dBA, 25dBA, 30dBA, 40dBA and 50dBA)
  • Specific ranges for CHP and container applications
  • Circular or rectangular design
  • Radial, axial and twin intakes
  • Stand alone and integrated catalysts
  • Stand alone and integrated spark-arrestors
  • All types of materials
  • All types of accessories available on request

ISO containers and enclosures:

  • Noise reduction (up to 50dBA)
  • Vibration isolated, noise controlled, shock resistant systems
  • Air inlet drive for combustion (filtered air optional)
  • Ventilation and air cooling for engine mechanics
  • Exhaust gas removal
  • Easy access for operators and maintenance
  • Accommodation of environmental requirements (e.g retention tank)
  • Engine and personnel protection
  • Fire protection
  • Lighting
  • Fuel tank connected to the engine
  • Electrical power cabinet connected to the generator

Auxiliary enclosures

IAC Boët Stopson enclosures offer the following features:

  • Noise reduction
  • Ventilation
  • Air filtration
  • Fire protection
  • Easy access for operators
  • Heavy-duty maintenance
  • Integrated lifting devices
  • Lighting
  • Integration of cables/pipe-works
  • Machine packing for shipment
  • Machine-base interfacing
  • Resistance to environmental conditions

Why use IAC Boet Stopson?

  • Turnkey solutions
  • On-base and off-base designs
  • Function integration
  • Logistics management (especially integration into customer's supply chain)
  • Mechanical, noise, and ventilation life guarantees
  • Project management


IAC Boët Stopson has extensive experience and technical know-how on a wide range of silencers for all type of applications, including:

  • Discharge to the atmosphere of pressurised fluid (steam, gas etc.) from outlet of starting valves, vent valves or similar
  • In-line treatment under pressure of compressed gas networks
  • Treatment of inlets and outlets of large industrial fans
  • Treatment of inlets and exhaust lines of gas turbines
  • Treatment of inlets and exhaust lines of engines
  • Treatment of inlets and outlets of suppressors and compressors
  • A team of skilled engineers optimises solutions according to customer requirements

IAC Boët Stopson

Stéphane Thronel
Tel: +33 (0) 3 2005 8393
Fax: +33 (0) 3 2005 8899
E-mail: stephane.thronel@boet-stopson.com