The CIP system, namely Cleaning-in-place, refers to the use of high-temperature, high-concentration cleaning liquid to clean the contact surface with food without disassembling or moving the machine. It is mainly composed of an alkali tank, acid tank, hot water tank, etc. The cleaning liquid is conveyed by centrifugal pump for forced circulation in pump and equipment to achieve the purpose of cleaning. CIP system is widely used in dairy plants such as yogurt processing machines, breweries, beverages, and general food plants.