TT KG was founded in 2009. Sanitation systems for railway operations are TT KG's business sector and core competence. Especially in Asian market

The company was restructured in 2013. As a result, EVAC covers  the entire market for vacuum sanitary systems in Asia.

In 2014, TTKG’s Chinese subsidiary, Shanghai Yicheng Vacuum Technology Co., Ltd., took over EVAC’s Asian distribution subsidiary.