EM-Technik developed the compact double-wing part-turn valve actuator. The construction principle is simple and extremely effective, the torque is directly generated by the turning movement of the wing and transferred to the ball valve. This makes the switching time faster than that in the case of doublepiston actuators. Its compact construction size is of particular interest. The part-turn valve actuator can be pneumatically controlled with very little consumption using all neutral, gaseous media. The standard actuators are spring-resetting. The double-wing part-turn valve actuator are provided with two- and three-way ball valves in the nominal width DN 4. The ball valves are available in the materials PP, PVDF, or PFA and are, therefore, particularly suitable for applications with aggressive media.