Semi-welded heat exchanger

Semi-welded heat exchangers are used as evaporators and condensers or when one of the media can destroy the seal material during operation

Advantages of semi-welded heat exchangers:

• Suitable for highly volatile media such as ammonia or freon
• Suitable for use with aggressive media such as acids or oils, provided that this medium is directed into the welded channel
• High operating efficiency over the entire load range.
• Compactness and economy of useful space.
• The possibility of mechanical cleaning of the collapsible channel.

Each pair of plates is welded to each other along the perimeter of the plates and nozzles, forming a welded section into which an aggressive or highly volatile medium is supplied. The heat exchanger consists of a set of such sections. Each section is connected to each other by means of special intermediate and O-ring seals. Another coolant is supplied to the channel between the sections. The package of heat exchange plates is divided into sections, and each section can be mechanically washed from both sides, washing inside the section is difficult and can only be carried out chemically.