Chengdu Keyi Science & Technology Co., Ltd. Ltd. is a high technology enterprise, specializing in PSA, gas separation devices, all kinds of program-controlled valves and related product development,our company owns and manages a assembly plant,a polymer plant and a valves plant. Our company holds national special commodity production permits, the company's products passed the ISO9001: 2000 certification.In addition, our company has more than 10 patents and holds advanced technology. Company oxygen / nitrogen devices, hydrogen plant, alcohol dehydration devices, program-controlled valves and other products are sold to to more than 500 enterprises at home and abroad.Moreover, our products which enjoy a highly praise are widely used in the petroleum, petrochemical, iron and steel industries, and export to South Korea, India and Thailand. We will adhere to the idea of "integrity first, customer first" , to provide users with high quality products