Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,706 pages of information and 232,164 images on early companies, their products and the people who designed and built them.
Makers of control valves, including chokes for oil/gas wells.
1967 company founded by Edward Singleton, who had had 18 years experience with a British/American control valve company
1974 the Kent Group was acquired by Brown, Boveri and Co of Switzerland
1985 Brown Boveri was merged with ASEA to form ABB
2000 ABB transferred Introl from the Kent Group to the Vetco division of ABB specialising in sub-sea wellheads and associated equipment.
2005 Introl was purchased from Vetco by Koso of Japan