WFB series unsealed self-priming pump adopts the "interlocking" multi-sided centrifugal sealing device, without the worry of "running, rising, dropping and leakage".Because the operation process has no sealing device friction, no wear and tear, so the service life is longer than similar products several times.The pump has temperature resistance, pressure resistance, wear-resistant "a drainage, lifelong self-priming" and other functions, self-priming performance is reliable, especially the use of "electric air control valve" with reliable operation, convenient disassembly, easy installation and other characteristics.The pump is made of stainless steel, reinforced polypropylene, cast steel and other materials, can be applied to various occasions, at the same time, according to user needs, but also designed in a variety of forms, rectangular, conical, can provide options for different forms of installation.Explosion-proof type, outdoor type, can be used in flammable and explosive, rain and fog, wet occasions.The cart moving type can freeze the pump to any position you need.