It is a special kind of  heat exchanger that makes use of an arrangement of metallic plates to transfer heat between two fluids. This technique of heat exchange is much better compared to that of a conventional heat exchanger. It is so because in this technique the fluids are exposed to a significantly greater area as they get spread over the metal plates.

Plate Heat Exchangers find application in a wide variety of industries including HVAC, Machinery, Pulp & Paper, Refrigeration, Steel ,Waste water treatment, Mining & Mineral and petroleum refining industry. This category of industrial heat exchanger is also used in hydrocarbon the energy and power industry.