Trevithick was the first to successfully use high-pressure steam (then known as "strong" steam). Until ca. 1800, the weakness of existing boilers coupled with the influence of James Watt had generally restricted steam boilers to very low pressures or "weak" steam.
High Pressure steam generators deliver up to 3 times more steam that penetrates into the very heart of the fabrics. Water is stored in a large water tank, separated from the iron, and sent to a high pressure boiler. A heating element heats the water and transforms it into steam. This steam is then sent from the high pressure boiler to the iron