Hayford licensing clover Roots blower is a combination of various types of domestic Roots blower technical characteristics of advanced technology on the basis of its own research and development of a new product. We developed the use of advanced CAD-aided design and advanced processing technology products to ensure that the fan performance, the national economy has been in a number of areas: sewage treatment, flour, aquaculture, pneumatic conveying, power, cement and other industries are widely used. Products are widely air volume, sub-file dense, high boost, nearly 100 types, over a hundred kinds of specifications. (1) products using clover straight impeller, intake and exhaust pulsation smooth, low noise. (2) The product is a special curve to make engagement more reasonable. Leakage, high efficiency, reduce energy consumption, is a new energy-saving products. (3) The product uses a variety of new structural design, compact structure, small size, light weight, elegant appearance. (4) products using high-precision hardened synchronized gears, long life, low noise. (5) The output of the air clean, free of any oily dust. Pressure range 9.8kpa-198kpa, flow range 0.33-347.25m3 / min