Sewage pump in the extensive use of impeller

The sewage pump is suitable for the discharge of serious polluting wastewater from factories, sewage discharge stations in residential areas, drainage systems of urban sewage treatment plants, drainage stations of civil air defense systems, water installations of waterworks, sewage discharge from hospitals and hotels, municipal construction sites, Exploration, mining auxiliary machine, rural biogas digesters, irrigation and other industries, conveyor belt particles of sewage, dirt, can also be used for clean water and with corrosive media. Sewage pump impeller is different. The AS tear submersible sewage pump impeller form is open impeller. Sewage pump impeller generally by the hub, blades and cover three parts. The cover of the impeller has a front cover and a rear cover. The cover on the inlet side of the impeller is called a front cover, and the cover on the other side is called a rear cover. Closed impeller on both sides of the cover, cover 4 to 6 leaves. When the blade bending direction and the opposite direction of rotation of the impeller, known as the shield curved leaves. General impeller blades are curved after the leaves. This closed impeller higher efficiency, the most widely used. There is no cover on both sides of the open impeller, and the blades are connected to the hub by ribs. This impeller has the advantages of simple structure, easy manufacture, low efficiency and suitable for conveying liquids containing more suspended solids or fibers.

Air conditioning refrigeration now generally uses water, ammonia, carbon dioxide, R12, R22, R134a, R404, R407C, R410 and R600a refrigerants. After 2009, Gree used R290, Jiabing, Zhongwei Refrigeration Company launched R433b, Furui Refrigeration Company launched ER445 series refrigerants, which are more energy-saving, environmentally friendly and efficient refrigerants, commonly known as hydrocarbon refrigerants, non-toxic, and will not cause any damage to the ozone layer. But because they are all alkanes, they are both flammable and explosive. Fluoride is a non-toxic, harmless, non-irritating, non-flammable, non-explosive, non-flash point, environmentally friendly refrigerant with 0 ODP value and very low GWP value.

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