The characteristics of the roots blower

　　Roots blower for positive displacement blower, transportation of air volume and revolutions in proportion, end face and fan impeller between front and back end cover and the fan impeller is always stay small clearance, the synchronous gear drive lee from fan inlet along the shell inner wall to the discharge side. Fan inside the cavity does not need lubricating oil, high efficiency and energy saving, high precision, long life, compact structure, small volume, light weight, easy to use, product versatility, petrochemical, building materials, electric power, smelting, chemical fertilizer, mine, port, textile, food, papermaking, aquaculture and sewage treatment, environmental protection industry, and many other areas, mostly used for conveying air, also can be used to transport gas, hydrogen gas, acetylene, carbon dioxide and other inflammable, explosive and corrosive gas.