Control valve for adjusting a process medium flow of a technical process installation

A method for providing electrical power for an electrical consumer of a control valve for adjusting a flow of a process medium for a technical process installation, said control valve having at least one cross section restriction which can be altered if required, comprising the steps of:

• providing a thermoelectric element disposed at the cross section restriction, said element being coupled to the electrical consumer for supplying electrical power thereto;
• and
• generating said electrical power at a location of a disposal of the thermoelectric element by means of a temperature difference that accompanies a pressure difference.

A method for providing electrical power for an electrical consumer of a control valve for adjusting a flow of a process medium for a technical process installation, said control valve having a housing with an interior to be traversed by the process medium, a valve seat disposed inside the housing interior, a valve member obstructing or clearing the valve seat wherein a flow cross section of the control valve can be altered according to relative position between the valve member and the valve seat for adjusting the process medium flow in order to initiate a pressure change in the process medium flow between an upstream duct section and a downstream duct section, comprising the steps:

• providing a thermoelectric element coupled to supply electrical power to said electrical consumer;
• and
• positioning said thermoelectric element at a position in the housing interior for generating the electrical power resulting from a temperature difference that accompanies a pressure difference at a location of said position of the thermoelectric element.