After so-called velvet revolution in 1989 the Sigma concern was split up to separated companies which were privatized or restored. The Sigma Česká Třebová was privatized and became an joint-stock company. Nevertheless the company was brought to bankruptcy in1995 by problematic decision of its management.
LDM bought it in 1996 and became the continuator of more than 100-years of valves manufacturing tradition in Česká Třebová.
LDM at the time of its foundation in 1991 started in let premises with main activity of buying and selling control valves SRV series from the contemporary company Sigma Česká Třebová. Parallely has been intensively worked on development of new products that should create the basis of the future production range.
In the following year – 1992, LDM for the first time introduced itself to profesional public at International trade fair in Brno and at the autumn´s Pragotherm in Prague. Here a new series of three-way, threaded valves RV 102 made of brass along with pressure-balanced valves, that arose the basic parts of SRV valves, premiered. In connection with electrohydraulic actuator, these valves were delivered as fail-safe action valves and they very soon became truly the most known product of LDM for next several years.
At the beginning of 1993, was completed PN16 line with flanged valves RV 103 made of grey cast iron. Significant step towards of the company future stability was buying its own premises, their reconstruction, changing into production lines and facilities and moving into them.
This year is marked with a completion of development and subsequent launching on the market a brand new series RV 210 – RV 215 of control valves PN 40. The valves practically at once became the top production range of the company. Up to the present day this valve line is the best-known product of the company probably and huge appreciation of their quality is that also they have been an still are manufactured under the marks of other producers (so-called OEM execution).