Our 400 series expansion joints are highly flexible expansion joints which have become indispensable structural elements in the areas of power generation (coal, oil-fired and nuclear power stations, gas turbine power plants), ore processing (blast furnaces and sinter plants), the cement industry, air conditioning and conveying technology (fans and blowers, in pneumatic and vibrating conveying systems, shipbuilding, apparatus and engine construction and numerous other branches of industry. They compensate thermal expansion on all planes and absorb mechanical and acoustic vibrations.