1907: Founded as "Brons" diesel engine manufacturer
1989: Acquired by Dresser - production of "Waukesha" gas engines
2003: Started machining of valve components for Control Seal
2005: Full manufacturing and assembly on Control Seal Valves
2005: Acquired by Cooper Cameron
2006: Acquired by private investors as Control Seal B.V.

1985: Tolboom Valve and LT Engineering founded Control Seal B.V.
1998: Acquired by Entech Industries Co. Huston, USA
2001: Acquired by Dresser, a USA Company
2006: Acquired & merged with Appingedam into Control Seal B.V.