WZW series pump's self-priming ability is outstanding. It neednot install bottom valve. It can discharge dirt which solid softparticles is sixty percent of pump's port and fiber length can befive times as long as pump's port. This pump widely applies todelivering polluted water, fiber, solid particles, slag, and paperpulp and so on. The pump is designed with store water room,horizontal bearing box. There are two kinds of axle-seals,mechanical seal and skeleton seal. There is an affusion entrance atthe top of pump in order to operate conveniently. The capacity isfrom 54 cub meter per hour to 300 cub meter per hour, the head from13m to 22m.