The semi-welded plate heat exchanger uses two plates along the sealing groove and is welded by laser welding to form a plate pair. The plate pair is sealed with a gasket and is superimposed on the fixed pressure plate and the movable pressure plate. A heat exchanger in the middle.
Grano semi-welded plate heat exchanger, the plate & frame heat exchanger adopt the most advanced laser welding technology with the most advanced welding distortion, small residual stress and high quality in the world. It features high heat transfer efficiency, long service life, and easy maintenance. Cooling and chemical treatment are reasonable alternatives to shell-and-tube heat exchangers, especially for evaporation and condensation of ammonia-based coolants and chemical treatment of corrosive liquids. Mainly used in ammonia refrigeration, sulfuric acid, caustic soda, petrochemical, metallurgy, machinery, pharmaceuticals, food and other industrial fields.
The Semi-welded Plate Heat Exchanger is particularly offered for heating and cooling of aggressive media. Two corrugated plates are positioned back to back and welded together as "cassette" by laser, along the sealing groove designed for the gasket of the semi welded PHE. The semi-welded plate for PHE is specially offered for aggressive media. Generally, two pieces of PHE stainless steel plates are welded back to back by laser along the sealing groove for the gasket to form the plate cassette. Each cassette is sealed with a gasket. The refrigerant flows from one cassette to the other, contacting with only two of the four ring gaskets at the inlet and the outlet.