Plate heat exchanger is a kind of heat exchanger made of stainless steel, titanium, SMO 254, Nickel 201 and other thin metal plates, which are pressed into heat exchanger plates with certain corrugated shapes, stacked and fastened with frame plates and bolts. A thin rectangular channel is formed between various plates, and heat is exchanged through the plates. The working fluid flows on the plate surface through hole on the heat transfer plate, and forms intense turbulence under the action of the plate ripple. It is like stirring hot water in the cup with chopsticks, which enlarges the heat transfer area. Thermal and cold media flow on both sides of the heat transfer plate, and a large number of heat transfer surfaces formed by turbulence contact with the plate, and sufficient heat transfer is performed through the plate to achieve the final heat exchange effect.Phe plate heat exchanger is used in machinery manufacturing for various quenching liquid cooling, cooling press, industrial machine lubricating oil, heating engine oil.