Zaopin Technologies (Hangzhou Zaopin ST Co., Ltd.) specializes in the design of automated tank cleaning and oil recovery solutions. Our product line currently includes:- COW: Crude tank cleaning with integrated oil recovery- PTC: Product tank cleaning with integrated oil recovery- SOR: Recovery of hydrocarbons from slop oils, tank bottom sludge, and other refinery wasteZaopin Technologies also conducts tank cleaning and SOR services worldwide.