Abstract: A diaphragm actuator (10, 40) for a control valve is shown including an actuator housing (12, 42), in which a diaphragm (14, 44) including a diaphragm disk (16, 46) is sealingly fitted thus forming a pressure chamber (20, 50), and furthermore at least one spring (24, 54) is provided which rests against the diaphragm disk (16, 46) and the actuator housing (12, 42), with the diaphragm disk (16, 46) being connected to a valve stem (22, 52) for actuating a valve body. At least two springs (26, 56) are provided and are disposed one after another in an axial direction between the actuator housing (12, 42) and the diaphragm disk (16, 46), with a spring seat element (28, 58) linearly guided by at least one linear guiding element (30, 60) being provided between the at least two springs (26, 56).

Abstract: A diaphragm actuator (10, 40) for a control valve is shown including an actuator housing (12, 42), in which a diaphragm (14, 44) including a diaphragm disk (16, 46) is sealingly fitted thus forming a pressure chamber (20, 50), and furthermore at least one spring (24, 54) is provided which rests against the diaphragm disk (16, 46) and the actuator housing (12, 42), with the diaphragm disk (16, 46) being connected to a valve stem (22, 52) for actuating a valve body. At least two springs (26, 56) are provided and are disposed one after another in an axial direction between the actuator housing (12, 42) and the diaphragm disk (16, 46), with a spring seat element (28, 58) linearly guided by at least one linear guiding element (30, 60) being provided between the at least two springs (26, 56).

Abstract: In a control device for a technical processing plant, a pneumatically driven actuator having an actuator stem is provided together with a valve operated by the actuator, the valve having a valve stem. A valve element is attached to the valve stem. A stem connector connects the two stems to each other for a forced transmission of axial actuating movements and for modifying an axial distance between adjacent ends of the valve stem and the actuator stem to adjust a total axial length of the two stems. The stem connector comprises two half-shells connected to each other, and two positioning devices are provided for a friction-locking coupling of the half-shells to the respective ends. At least one of the positioning devices is designed to modify an axial attachment position of the half-shells along one of the stems.

Abstract: The invention relates to an actuator (10) for controlling a fluid flow which comprises a valve housing (11), a flow restrictor (18) and a valve seat (16), in which the flow restrictor (18) is designed such that the flow restrictor (18)—together with a closure (22) which is connected to the valve housing (12)—will form a pressure-relieving chamber (28), and as a result, a relative movement of the flow restrictor (18) and the chamber closure (22) together with the actuation will cause the volume of the pressure-relieving chamber (28) to change as a function of the direction of movement, and the flow restrictor (18) has a recess (24) which will allow the fluid to be controlled to flow into the pressure-relieving chamber (28).

Abstract: In a valve system or method, an actuator is provided with an actuating rod. A valve is actuated by the rod and has a valve stem and a valve member secured thereto. A travel limiting device defines a travel limit of the actuating rod. A setting mechanism sets the travel limit. The actuating rod and valve stem are decouplable from each other. The setting mechanism comprises a connector for coupling the actuating rod and the valve stem, the connector being designed to set an axial spacing between the actuating rod and the valve stem.

Abstract: Process valve for controlling and shutting off a fluid stream comprising a valve seat (10, 30) for receiving a movable valve body (14, 32) in a through hole (12, 36), the valve seat (10, 30) and the valve body (14, 32) are adapted to be pressed into and onto a sealing edge (18, 38) in order to prevent a fluid stream through the process valve. A circumferential groove (20, 36) resides in the valve seat and a flexible sealing lip (26, 44) is formed between the groove (20, 36) and the sealing edge (18, 38). The geometry of the groove (20, 36) is formed such that the side surface (22, 40) closer the sealing edge (18, 38) of the groove (20, 36) is arranged such that the size of the sealing lip (26, 44) increases with increasing depth of the groove (20, 36).

Abstract: The invention relates to an actuator (10) for controlling a fluid flow which comprises a valve housing (11), a flow restrictor (18) and a valve seat (16), in which the flow restrictor (18) is designed such that the flow restrictor (18)—together with a closure (22) which is connected to the valve housing (12)—will form a pressure-relieving chamber (28), and as a result, a relative movement of the flow restrictor (18) and the chamber closure (22) together with the actuation will cause the volume of the pressure-relieving chamber (28) to change as a function of the direction of movement, and the flow restrictor (18) has a recess (24) which will allow the fluid to be controlled to flow into the pressure-relieving chamber (28).

Abstract: In a control device for a technical processing plant, a pneumatically driven actuator having an actuator stem is provided together with a valve operated by the actuator, the valve having a valve stem. A valve element is attached to the valve stem. A stem connector connects the two stems to each other for a forced transmission of axial actuating movements and for modifying an axial distance between adjacent ends of the valve stem and the actuator stem to adjust a total axial length of the two stems. The stem connector comprises two half-shells connected to each other, and two positioning devices are provided for a friction-locking coupling of the half-shells to the respective ends. At least one of the positioning devices is designed to modify an axial attachment position of the half-shells along one of the stems.

Abstract: The invention pertains to a sealing arrangement 10, 10a, which acts between a housing 12 and a component 14 installed in the housing 12, with a stop 16, permanently connected to the housing 12; with a spring 20, which is supported on the stop 16; and, with at least one first sealing element 22 in working connection with the spring 20. Abutment 34 is designed to be adjusted against the force of the spring such that the spring 20 is completely compressed—squeezed into a block—and additional load can be exerted on the sealing element 22, so that in particular any leakage which has developed can be stopped—on an emergency basis—by the exertion of additional load on the sealing element 22, which has the effect of increasing the sealing force which the sealing element 22 exerts.

Abstract: In a valve system or method, an actuator is provided with an actuating rod. A valve is actuated by the rod and has a valve stem and a valve member secured thereto. A travel limiting device defines a travel limit of the actuating rod. A setting mechanism sets the travel limit. The actuating rod and valve stem are decouplable from each other. The setting mechanism comprises a connector for coupling the actuating rod and the valve stem, the connector being designed to set an axial spacing between the actuating rod and the valve stem.

Abstract: The invention pertains to a sealing arrangement 10, 10a, which acts between a housing 12 and a component 14 installed in the housing 12, with a stop 16, permanently connected to the housing 12; with a spring 20, which is supported on the stop 16; with at least one first sealing element 22 in working connection with the spring 20; and with an abutment 24, 34, which cooperates with the side of the sealing element 22 facing away from the spring 20 and which is permanently connected to the housing 12, where the sealing element 22, by virtue of the force of the spring, presses against certain areas of the housing 12 and the component 14, so that a sealing action is created extending from the front to the rear of the housing 12 and of the component 14.

Abstract: A drive unit is designed as a diaphragm drive with return springs for shifting an associated actuator, connected by a diaphragm plate and a driving diaphragm, into a safety position. The drive unit also includes actuating springs that are held in a compressed state by two nested sleeve-shaped counterbearings that are locked during normal operation and located coaxially with respect to the return springs. The lock is formed by a temperature-dependent joint.