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COVNA Group Inc. Headquartered in Denver, Colorado, USA, is a collection of research and development, design, sales and service in one, specialising in the production of automation control regulating valves, pneumatic valves, electric valves, solenoid valves and other flow control and automation equipment accessories, COVNA as the world’s industry to provide services to the world’s one of the main suppliers of a number of well-known enterprises and well-known brands.