The gasketed plate heat exchanger is composed of a plate heat exchanger plate, a balance tank, a centrifugal sanitary pump, a hot water device, a bracket and an instrument box. A new type of high efficiency heat exchanger assembled from a series of metal sheets with a certain corrugated shape. A thin rectangular channel is formed between the various plates, and heat exchange is performed through the half sheets. It’s used for sterilization cooling of milk or other heat sensitive liquids. The utility model has the advantages of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, convenient installation and cleaning, wide application and long service life. The types of plate heat exchangers are mainly frame type (detachable type) and brazed type. The plate form mainly consists of herringbone corrugated plate, horizontal straight corrugated plate and nodular plate.