ROPO Founded in Nordrhein-Westfalen Germany in the 1950s. In 2006, we built a large factory manufacturing pneumatic valve actuator with invested capital of USD 20, 000, 000 and an area of 66, 660 square meters in Jiangsu Province in China. We mainly produce Pneumatic Actuators, Pneumatic Valves, Electronic Valves, and manual valves, Ball valves, butterfly valves and other related products with best quality, reasonable price and excellent service.