to Hunt Thermal Technologies. Corac Group plc was renamed as TP Group plc in 2015 and Hunt Thermal Technologies has since been renamed as TPG Engineering. Wellman Thermal Services This makes industrial furnaces. A division of the company, Wellman Process Engineering, makes evaporators and crystallisers. The company makes boilers for combined heat and power schemes. Wellman-Robey boilers are made at Oldbury. Wellman Defence This started as the research division of John Brown Engineers and Constructors Ltd in 1957. It became part of Wellman Group in 1996. Its main significance is that it developed the equipment for purified air that allows the Royal Navys nuclear submarines to be submerged for months at a time – Submarine Atmosphere Control. This uses an electrolyser. Carbon dioxide from the submarine reacts with hydrogen from the electrolyser and is removed. It also supplies oxygen generation equipment to other countries such as France for the new Barracuda-class submarine. Wellman Defence was acquired by Corac Group plc in 2012 and renamed to Atmosphere Control International. Corac Group plc was renamed as TP Group plc in 2015 and Atmosphere Control International has since been renamed as TPG Maritime Products Boilers – 100 kW to 35MW Steam boilers Water heat recovery boilers Furnaces – now part of the Almor Group (www.wellman-furnaces.com] Combined heat and power schemes Heat exchangers Air purifiers for nuclear submarines Installations North British Distillery, Edinburgh References External links Wellman Defence Wellman Hunt Graham Wellman Robey Boilers EPCB Boiler Website Graces Guide Profile Companies based in the West Midlands (county) Boilers Industrial furnaces Heat exchangers Heating, ventilation, and air conditioning companies Defence companies of the United Kingdom Engineering companies of the United Kingdom Conglomerate companies established in 1919 1919 establishments in England Manufacturing companies established in 1919 See also