The WFB series unsealed self-priming pump has multiple functions such as temperature resistance, pressure resistance, wear resistance, "one-time drainage", and "lifelong self-priming". At present, we produce various materials such as PTFE lining, chlorinated polyether, ultra-high molecular weight polyethylene, polypropylene, stainless steel, cast steel, pig iron, etc. The WFB type unsealed self-control self-priming pump is widely used in industries such as electronics, power, chemical, metallurgical, pharmaceutical, food, electroplating, environmental protection, fire protection, municipal, water purification, national defense and military industry, textile printing and dyeing, mining and mineral processing, etc.