Abstract: A self-operated regulator can be configured to control a stream of working fluid, such as of a processing plant. The self-operated regulator can include a control valve and a control actuator configured to receive supply energy for the provision of an operating force exclusively from the stream of working fluid and/or from the working fluid for operating the control valve. A magnetic field source can be coupled to the control valve such that the magnetic field source follows the movement of the control valve to determine the movement using, for example, a magnetic sensor. The position of the control valve can be detected based on the determined movement.

Abstract: A self-operated regulator for controlling a stream of working fluid particularly of a processing plant, comprising a control valve and a control actuator configured to receive supply energy for the provision of an operating force exclusively from the stream of working fluid and/or from the working fluid for operating the control valve, characterized by a magnetic field source coupled to the control valve such that it follows the movement of the control valve for determining the movement thereof by means of a magnetic sensor for detection of the position of the control valve.

Abstract: The invention relates to an actuator (10) for controlling a fluid flow comprising a basic housing (12a) having an inlet (14) and an outlet (16), a valve seat (18) provided in the basic housing (12) between said inlet and said outlet (14, 16), a valve body (20) that can be operatively connected to the valve seat (18), a valve rod (22) for actuating said valve body (20) as well as means for actuating the valve rod (22). The invention is characterized in that an additional housing (12b) is mounted on said basic housing (12a) in a fluid tight manner and that the basic and additional housings (12a, 12b)—with the exception of the inlet and outlet (14, 16) form a completely sealed housing (12) that is closed on all sides and only includes one circumferential seal (24), and that said valve rod (22) is completely disposed inside said sealed housing (12) without any passage.

Abstract: The invention relates to an actuator (10) for controlling a fluid flow comprising a basic housing (12a) having an inlet (14) and an outlet (16), a valve seat (18) provided in the basic housing (12a) between said inlet and said outlet (14,16), a valve body (20) that can be operatively connected to the valve seat (18), a valve rod (22) for actuating said valve body (20) as well as means for actuating the valve rod (22) The invention is characterized in that an additional housing (12b) is mounted on said basic housing (12a) in a fluid tight manner and the means for actuating the valve rod is disposed within the housing(12) formed by the basic and additional housings (12a, 12b).