Design, development of accompanying documentation, valves assembly process control and installation control. Scientific and Production Enterprise ARMA-T is a developer and manufacturer of valves for industrial use. The company produces a shutoff and control valves: ball valves with manual (electric, pneumatic) actuator. Working at the company I got practical and theoretical skills for development and design different type of ball valves, three-way ball valves, shutoff and control valves, butterfly valves, manual and pneumatic actuator for low and high pressure industrial pipelines. I had implemented a lot of my projects in metal. Most of the projects were designed for gas and oil transit pipelines.