WFB antifreeze-type self-priming pump widely used in petroleum, coking, electricity, chemicals, metallurgy, medicine, food, electroplating, environmental protection, fire protection, municipal, water, defense industry, petrochemical industry, mining mineral processing, civil construction and other industries, is replace the long axis of liquid pumps, submersible pumps, submersible sewage pumps ideal equipment. Design Features rectangular shape with vertical, trolley-shaped or conical, applied vacuum principle, self-absorption properties of stable and reliable, with "electric air control valve" and achieve "a draining, life-long self-priming", shaft seal liquid dynamic seal forms, as non-contact sealing surface, so no relative friction, no wear, get rid of the traditional pump packing seal and mechanical seal, a long service life than similar products of 10 times. materials with material conditions by the use of the decision can be separately selected 1Crl8Ni9Ti, 316L, M02Ti, although by 5 polypropylene, Q235 steel.