Effox-Flextor designs and manufactures guillotine/slide gate, louver, diverter, stack isolation, butterfly/wafer, poppet, and radial vane-type dampers. Depending on type the dampers are used for precise flow control, cement plant, power plant, power boiler isolation, turbine, reverse gas flow, outlet flow, bypass flow, and fan inlet control applications.

Fox Equipment engineers louver dampers, slide gate dampers, wafer/butterfly dampers, diverter/flap dampers, radial vane/VIV/IVC dampers, stack isolation dampers, and poppet dampers. The louver damper are available as parallel, opposed, and double types. The slide dampers are available as low leak and zero leak models; with the wafer/butterfly dampers used in round duct applications. The diverters/flap dampers are used in gas turbine applications, and the radial dampers provide flow control for fan inlets.

Joiner Systems Inc.engineers damper types including: louver, butterfly, guillotine, slide gate, diverting, stack cap and flap isolator, and poppet. All the dampers are designed to withstand high pressures, temperatures, and corrosive gases found in processing systems.

Mader Dampers - a division of Mader Machine Inc. - specializes in manufacturing butterfly dampers, louver dampers, inlet vane dampers, tee dampers, poppet dampers, guillotine dampers, slide gate dampers, and specialty dampers.