The highly flexible RATO DS+ coupling has been specially designed for the use in installations requiring a high level of torsional flexibility and medium level of misalignment apacity. The ACOTEC Coupling of VULKAN Drive Tech has been developed to offer an applicationoriented coupling design especially for compressor drive systems. The development of the new RATO DS+ was primarily focused on the on the centrepiece of the coupling: the elastomer. Innovative research on compounds and highly specialised vulcanisation technology facilitated the development of an elastomer with considerably higher power density. The ACOTEC compound characterises itself in comparison to other conventionally used materials not only with the enhanced tensile strength and tear strength and increased ultimate elongation, but also with a high thermal resistance and lesser ageing effects.