Due to its variable conveying capacity, self-priming ability, reversible capability and ability to transport liquids containing solid particles, the screw pump is widely used in conveying water, wet sludge and flocculant solution in sewage treatment plants. Due to its structural and operating characteristics, screw pumps offer the following advantages over piston pump centrifugal pumps, vane pumps and gear pumps: They deliver high-solids media. Uniform pressure flow stability, more obvious when low speed. The flow rate is proportional to the pump speed and therefore has good variable regulation. A pump can be used to transport different viscosity media. Pump installation position can be arbitrary tilt. Suitable for transporting sensitive items and susceptible to damage by centrifugal force and other items. Small size, light weight, low noise, simple structure, easy maintenance. Screw pump can be widely used in the following industrial sectors, conveying a variety of media. Chemical industry: acid, alkali, salt, all kinds of viscous, pasty milky chemical slurry. Exploration Mining: Various drilling muds, mining water, floating pulp and floats. Shipbuilding: bottom sewage, sewage oil, all kinds of fresh oil. Ceramics industry: clay, clay, glaze. Energy industry: all kinds of fuel, coal-oil slurry, coal-water slurry, slime and nuclear waste. Sewage treatment: sewage, sewage sludge, sludge. Paper industry: a variety of cellulose pulp, paint, black liquor. Medicine, food, make-up industry. A variety of grain pulp, starch paste, paste, mother liquor, mashed potatoes, wine and lees and so on. Other agriculture, forestry, animal husbandry and fishery: There are also a wide range of uses.