Improve screw compressor displacement is: a screw length longer; 2, increasing the diameter of the screw; 3, to improve rotor revolutions. Long screw length will reduce rotor stiffness, increase the number of revolutions is a substantial sacrifice bearing life at the expense of imported large air compressor, are desirable. Therefore, most manufacturers have adopted the method of increasing the rotor diameter to increase the displacement of the compressor series large air compressor installation, but the theoretical and the actual display of the screw has an optimum range of linear velocity: 15-30m / s, in which within the range of optimum efficiency, minimum loss, and the line speed and the screw speed is equal to the radius of the plot, which determines the diameter of the screw should not be too large. Due to the large screw compressor in length and diameter in certain circumstances, increase the displacement only increase speed. Consequences is the temperature rise, high abrasion, cut exhaust pressure to accelerate, accelerate displacement reduction, noise increases. In certain models of the screw length and diameter are design limits. Compressor Rental Co., Ltd. Shanxi Kisan share with you the main features of mobile screw compressor: 1, high reliability: less compressor parts, no wearing parts, so it reliable operation, long life, overhaul interval up to 40,000 - 80,000 hours; 2, easy operation and maintenance: large air compressor high degree of automation much money, the operator does not have to go through a long period of professional training, exactly like a fool machine, enabling unattended operation; 3 power balance is good: there is no unbalanced inertia force, can be smoothly at high speed, the operation can be realized without foundation, particularly suitable for use as field operations, small size, light weight, small footprint. Large air compressor model, Shijiazhuang large air compressor, air compressor provided by the Shanxi Qishan Kisan compressor Leasing Corporation. Shanxi Kisan Compressor Rental Co. (www.qskyjzl.com) (www.qskyjzl.com) strong, credible, in Taiyuan, Shanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qishan compressor and you hand into the brilliant, for a better future!