In case of Process-Phoenix during installation a specially (for the project) designed and manufactured liner impregnated with resin is inverted into the host pipe. Polymerization and curing of the resin is ensured by introducing steam or hot water into the system. 

The cardinal question of Process-Phoenix technology is the inversion drum. The amount of the liner that can be wound up into the drum is determined by the size of the inversion drum.  This means that the length of the pipe sections to be rehabilitated in one step, therefore the number of trenches to be dug out is determined by the size of the inversion drum.

It has already happened that the host pipe could have been rehabilitated with less and longer sections if they could have used a much bigger inversion drum or an equipment capable of limitless inversion of the liner.

The longer sections require less trenches, therefore the whole project needs less earth work, needs less time and has much less costs. All these formulated the demand for the development of such an inversion equipment that is able to invert an impregnated liner regardless of its diameter and length.

After the detailed analysis of the problems occurred and adding the more than twenty years of experience in the field of No Dig constructions, and collecting all pieces of information on the new demands the new inversion equipment ULTRAGUN capable of inverting impregnated liners regardless of length.