HFM Plate Heat Exchangers, plate type heat exchangers (PHE), consist of a number of parallel flow channels, formed by adjacent metal plates that are either welded or separated by gasket material around the perimeter of each plate. The plates can be formed from a variety of metals, but typically are made of stainless steel. The minimum recommended construction material for all types of PHEs and welded PHEs is type 304 stainless steel.
All plate heat exchangers look similar from the outside. The differences lie inside, in the details of plate design and the sealing technologies used. PHEs are presently operating in such liquid-liquid services as heat recovery loops, chemical process coolers and heaters, oil platform applications, and seawater cooling. Partially welded PHEs make good applications in product coolers using cooling water.