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Dampers and Expansion Joints

Effox-Flextor-Mader (EFM) is the international leader in the design and manufacture of dampers and expansion joints for use in flue gas and process air handling systems.

EFM dampers, fans, and expansion joints are being used in systems that clean polluting emissions and contribute to reducing greenhouse gases. Known for their commitment to quality, EFM offers engineered-to-order solutions that meet the most demanding specifications for the world’s most stringent customers.

  • Texas
  • Louisiana
  • Oklahoma

Adaptable fuel combustion and exhaust equipment

Effox Flextor Mader builds safe, durable, and reliable equipment demanded by the high temperatures and harsh environments found in solid fuel combustion.

Over the decades, EFM has established itself as a global leader in the industry by crafting and installing products that are unparalleled in value and reliability, and complies with the strictest regulations in the industry when needed. Their team includes a skilled staff of engineers, designers, fabricators, and field service personnel to ensure high quality engineered-to-order product.



With over 35 years of experience, EFM offers time tested robust dampers to achieve a 20+ year low maintenance design life. Constructed with carbon steel, stainless steel, alloy, and/or corrosion resistant materials EFM dampers are capable of withstanding temperatures up to 2400° F (1315° C) and the most chemically punishing environments.

Expansion Joints

EFM is the world leader in the design and supply of non-metallic expansion joints. They offer designs specifically engineered for every application and have supplied expansion joints in Boilers, Incinerators, Fans, Environmental Control Equipment such as SCRs, FGD, and Fabric Filters.

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