Jinan Guangrui Machinery Co., Ltd. is located in Puji Town, Zhangqiu District, Shandong Province, with a long history of industrial and mining enterprises. The company has a registered capital of 10 million yuan, covers an area of 15000 square meters, and has more than 30 senior and intermediate technical personnel. The main product is a three blade Roots blower, which absorbs and draws on advanced technology and manufacturing experience at home and abroad, uses CAD computer-aided design and CAM CNC machining technology, independently develops and manufactures a new high-quality, high life, high efficiency, low-noise energy-saving product. It has outstanding characteristics such as reasonable structure, small size, low noise, high efficiency, energy saving and consumption reduction, long operating life, and easy maintenance. In addition, Roots blowers are reasonably priced and have a complete range of models. The product varieties include Shandong Roots vacuum pump, GRSR series three leaf Roots blower, wear-resistant and corrosion-resistant series three leaf Roots blower, double oil tank series three leaf Roots blower, high-pressure series three leaf Roots blower, dense assembly series three leaf Roots blower, special gas special sealing series Roots blower, and high flow high-pressure series Roots blower. There are numerous series of products with complete varieties, complete production and testing equipment, and more than 30 precision and rare equipment such as high-density boring machines, blower processing machines, large gantry planers, high-precision balance testing machines, precision grinders, CNC machine tools, etc. We also have a microcomputer data acquisition system platform for blower machine testing. Numerous series of products with wide coverage and dense grading of air volume, nearly 3000 technical parameters and performance points, have been widely used in industries such as sewage treatment, cement building materials, aquaculture, flour production, chemical fertilizers, pneumatic conveying, power desulfurization, steel smelting, vacuum adsorption, casting, mining, coal washing, kilns, light industry textiles, pressurization and combustion assistance, sandblasting and shot blasting for many years, and have gained recognition, trust and praise from users.