What are all welded plate heat exchangers and semi-welded plate heat exchangers

The plate heat exchanger is a high-efficiency heat exchanger made up of a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates for heat exchange. So what are all What are all welded plate heat exchangers and semi-welded plate heat exchangerswelded plate heat exchangers and semi-welded plate heat exchangers?

(1) Semi-welded plate heat exchanger

The structure of the semi-welded plate heat exchanger is that every two corrugated plates are welded together, and then they are combined together and sealed with gaskets. The channel between the plates welded together carries the fluid with higher pressure, and the channel between the plates sealed with the gasket carries the fluid with lower pressure, so the plate heat exchanger increases the working pressure on one side. Its main application areas are: chemical industry; pharmaceuticals and specific chemicals; injection control systems; HVAC; district heating, thermal power plants; food technology; cooling tower heat recovery; petrochemicals; heating; electricity; metallurgy; bioenergy ; Oil refining; power plant; high temperature industry.

(2) Fully welded plate heat exchanger

In order to make the plate heat exchanger suitable for working under high temperature and high pressure, the plates are welded to each other, but this structure is difficult to manufacture, and the plates cannot be repaired after they are damaged. It is mainly used in ammonia refrigeration, sulfuric acid, caustic soda, petrochemical, metallurgy, machinery, pharmaceuticals, food and other industrial fields.