The WFB series of non-sealed self-control self-priming pumps is a product that fills a domestic gap, featuring multiple functions such as temperature and pressure resistance, "single-pass drainage," and "lifelong self-priming." Currently, we produce a series of complete units in various materials including 321, 304, 316, 316L, A3, and PP (reinforced polypropylene), with five different designs totaling over a thousand specifications. Widely applicable in industries such as electronics, power, chemicals, metallurgy, food, electroplating, environmental protection, firefighting, municipal construction, water purification, textile dyeing, mining, and civil construction, it has received high praise from customers.