GULDE 8100 series pneumatic diaphragm type direct travel actuator use multi-spring structure, which is characterized by compact structure, high pressure resistance, high output force, long life and flexible configuration. The lower end of the actuator is equipped with a standard connector for connection to valves, allowing simple and robust connection to valves. The side of the bracket is equipped with a positioner mounting plate in accordance with the NUMAR standard, which can realize a fast and reliable connection with the positioner. The actuators are available in two types, positive and negative acting, and the stroke and air pressure requirements can be changed to match the actual working conditions of the user. This actuator is available in both direct-acting and reverse-acting configurations, and can be customized to meet the actual needs of users by altering the stroke and air supply pressure requirements to match the specific operating conditions. The series offers a maximum stroke of 140mm (5.5 inches) and is optionally available with a handwheel.