Samson Aktiengesellschaft

Karl-Bernd Schaertner

Stefan Kolbenschlag

Joerg Kiesbauer

Thomas Karte

Frank Valentin-Rumpel

Fausto Crespo Vidal

Dirk Klee

The invention relates to a process valve () comprising a valve seat (), a flow restrictor (), a valve rod () and a drive unit () acting thereon, with a force measuring device () being connected between said drive unit () and said flow restrictor (). The invention is characterized in that said force measuring device () includes a spring (), and said force measuring device () comprises a travel measuring device () so as to allow the force acting on it to be determined based on the change in the deflection of the spring () caused by the force acting on it.

Process valve including a force measuring device

In an actuating drive or method for capturing a position of a final control element to be positioned by a drive member of the actuating drive, the final control element is pushed from an initial position to a target position by a spring body acting on the drive member. A first reference position is spatially configured in a vicinity of or at the spring body. A second reference position moving relative to the first reference position during positioning movement of the drive member is spatially configured adjacent a first outer surface of the spring body. A distance between the first reference position and the second reference position is captured.

Actuating drive for positioning a final control element and method for capturing a position of the final control element

In a limit signal indicator for determining two positions of a pneumatically operated positioning device, a position sensor detects a position of the positioning device. A first signal transmission contact, a second signal transmission contact, and a microprocessor are provided. The first and the second signal transmission contacts each output a respective electrical limit position signal, the limit position signals representing an adoption of the first and the second positions or of at least one position of the positioning device above or below a predetermined set limit value. At least one of the signal transmission contacts is connected for signal transmission so that in case of a malfunctioning of a signal transmission, the switch amplifier is capable of generating an emergency signal above a maximum limit value or below a lower limit value, and to transmit the emergency signal to an external processing location. The microprocessor, upon detecting a specific operational malfunctioning, actuating the positioning device and executing an emergency procedure according to which the same emergency signal is generated and output at the second signal transmission contact.

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Nidderau, Germany

Karl-Bernd Schaertner