Economically it makes sense to recover heat from a hot product stream and to pass it to an incoming cold stream.  Although there are many methods of recovering heat from non-particulate fluids, those containing particulates such as pulpy juice from fruit and vegetables pose a problem.

The Regenerator (or Triple Tube) efficiently re-uses heat by providing two opposing fluid paths which are wider than in conventional annular or wide gap heat exchangers, minimising blockages with difficult products.

The tubes are sealed into the special headers with the use of two o-ring seals.  An external weep detection port is present between these two o-rings allowing for the detection of a seal failure.