Structure: Central main pipe + 4-8 radially wound branch pipes, arranged in a star-shaped radial pattern, covering the entire tank cross-section.

Applications: ① Top liquid distribution; ② Middle drainage of the resin layer (middle drainage device), countercurrent regeneration to discharge waste acid and alkali, and backwash distribution;

Tank compatibility: Φ800-3000 mm cation exchange bed, anion exchange bed, mixed bed (for refining starch saccharification solution);

Gap: 0.20-0.25 mm. The gap is less than 2/3 of the resin particle size, preventing resin leakage. The gap is narrow on the outside and wide on the inside, making it less prone to clogging. It can be self-cleaned by backwashing.