CPVC pall ring is greatly improved on the raschig ring. Although the outer diameter of the ring is equal to the height, two rows of Windows with internal extensor tongues are opened on the wall of the ring, and there are 5 tongues in each layer of window holes. This structure improves the gas-liquid distribution and makes full use of the inner surface of the ring. Compared with raschig ring, the capacity can be more than 50% larger, and the pressure can be reduced by half; It is usually made of metal, plastic or ceramic.
