A lined agitator is a type of mixing device used in the chemical, pharmaceutical, and food industries for the mixing, blending, and homogenization of liquids and solids. It consists of a shaft with one or more blades or impellers that rotate inside a lined vessel or tank.The lining of the agitator and vessel is typically made of materials such as glass or PTFE (polytetrafluoroethylene), which provides a non-reactive and corrosion-resistant surface that is ideal for use with a wide range of chemicals and other materials.