The kneader is widely used in many industries: high viscosity sealant,silicone rubber,BMC,adhesive, also used inbatteries, ink, pigments, dyes, phatmaceuticals, resins, plastics, rubber, cosmetics ects.The paddle shaft seal with a unique equllibrium structure of the vacuum tank to prevent the the fillerswear particles into the cylinder, particularly favorable to improve the system vacuum and materio.