A supply tube for 19L liner bags, made entirely from high-purity PFA in one piece. It resists photoresists and highly corrosive electronic solvents without reacting with the media or leaching impurities. The product passes strict particle and metal leaching testing and fully meets the cleanliness standards of dust-free semiconductor production lines. A side hole at the top of the tube balances internal pressure, preventing the liner bag from collapsing under negative pressure during extraction, and the base uses an FKM fluoroelastomer sealing ring for leak-free sealing when locked. The standardised connector links directly to automated transfer piping, ensuring continuous, stable feeding of medium-batch high-purity chemicals.