Precision Co., Ltd. Shanghai Vacuum Pump Factory million valve manufacturer in China, is a research and development, production, marketing, sale as one of the valve manufacturer. Plant total construction area of nearly 33,000 square meters, employs 415 people, including engineers, more than 30. The company has advanced production equipment, large CNC machine tools, machine tool, universal grinder, high centrifugal casting, precision casting, micro-computer and other advanced processing equipment tester for the product to provide a quality guarantee. Our main products are: series of rotary vane vacuum pumps, water ring vacuum pump series, Roots vacuum pumps, vacuum equipment.