This series of pumps are widely used in industry, agriculture, studied the breeding, mines, construction sites, municipal sewage and so on, can be pumping containing short fibers, confetti, sediment and other solid particles or soft solid objects, such as mud, grey water, life wastewater, sewage, etc., is an agricultural irrigation and drainage, digging, and the ideal water conservancy equipment from the construction site, However, it is not suitable for the occasions with explosion-proof requirements.