Previously introduced low pressure vacuum carburizing systems have focused only on the capability to perform the vacuum carburizing process. Multiple chamber systems were designed with this capability in mind. A significant financial investment was required for this technology, but the system lacks flexibility if alterations in product mix took place. A new Cloverleaf Vacuum Carburizing system has been recently introduced that can perform various processes in different heat treating chambers at the same time. This system allows for the flexibility of high vacuum hardening, annealing, carburizing, carbonitriding and other similar processes along with the possibility of oil quenching or high pressure gas quenching. Details of the furnace construction including the vacuum tight inner door design, inner chamber construction, radiant tube gas fired heating and other points will be reviewed. Typical cycles will also be reviewed showing the wide variation of processes which can be performed. Commercial heat treaters that are looking to install low pressure carburizing technology, but do not feel confident about their ability to fully load the chambers should plan on attending this talk.