a reasonable formula)molding, machining. It has the advantages of fluorine plastic such a variety of strong corrosion resistance, and has high mechanical strength, aging and non toxin decomposition for FZB, FZB-L type self-priming pump is in accordance with the requirements of the majority of users in the chemical industry, the design of a new type of fluorine plastic synthetic corrosion-resistant products. This pump uses the mixed type self-priming structure, in addition to start for the first