Brazed plate heat exchanger full brazed plate heat exchangers semi-welded plate heat exchanger consists of a number of corrugated stainless steel plates pressing the front and rear cover plates, among the plate with high purity thin copper (or nickel plate) separated in high-temperature vacuum furnace brazed. Each corrugated board according to customer requirements, high, different combinations, low-flow heat transfer plate to achieve the best effect of heat transfer, heat transfer coefficient up within 3000 ~ 12000wm2.K range the entire device with no gasket no the outer frame is formed compact plate heat exchanger, can withstand continuous operation under high temperature and pressure conditions. The main application areas: heat pump units; chillers; waste heat recovery; lubricants, cooling, heating; cooling heating the compressed gas; medical, food, electronics, high heating and cooling water; ammonia refrigeration; boiler / steam; other industrial applications and so on.