Browse pneumatic actuators at Stockpile Express and find top-quality products from Siemens, Johnson Controls, Honeywell Commercial, and other trusted makers. A pneumatic actuator converts compressed air into energy to open or close a valve. Our selection includes piston- and spring-powered linear pneumatic actuators, as well as pneumatic actuator parts, including diaphragms, kits, and globe valves. Find options crafted in aluminum, brass, glass-reinforced polymer, neoprene, and other durable materials to withstand extended use. To streamline your search, use our helpful filters to sort results by product type, size, and flow rate.