The FPZ self-priming pump, uses the enhancement polypropylene (CFR-PP) time to cast takes shape. The mechanical strength high, the anti-corrosive performance is strong, in the self-priming pump structure has an alone standard the scientific nature, pumps in the cavity to be equipped with the room, the room, returns to the fluid check valve, the gas tucks in the fission chamber, the backflow hole. Only must front pour into in first time of opening machine directs the fluid, later will not need to duplicate pours into directs the fluid, when will attract will deliver the medium, the fluid may intermittent, break in the fluid 12 minutes to come the fluid to be possible to continue to attract delivers, the mechanical seal will not have to add seperately the cooling water to cool, the operation will be simple safely, not divulges, substitutes for the best product which under the fluid will pump. CFR-PP material quality: Non-toxic, does not have the pollution, bears the common acid and alkali salts, the operating temperature -14 ℃ ~ 80 ℃.