Abstract: A valve has a valve housing with a valve seat and a valve body holder with a fluid-permeable flow opening. A valve body is arranged in the valve body holder and axially displaceable between an open state and a closed state of the valve. The valve body has an envelope surface with a sealing region for fluid-tightly contacting the valve seat in the closed state. It has a base region adjoining the sealing region in longitudinal direction. A cross section contour of the envelope surface increases monotonously from the sealing region to the base region. In the open state, an axial end of the base region contacts the valve body holder. The envelope surface has a weakened region connecting sealing region and base region to each other. The weakened region has a reduced stiffness along the longitudinal direction. The valve body is formed of a thermoplastic polyhalogen olefin.

Abstract: A valve body for a valve has an envelope surface with a bell-shaped cross section contour in a longitudinal direction of the valve body. The envelope surface is provided with a guide region for guiding the valve body in a valve seat and is further provided with a sealing region for contacting fluid-tightly the valve seat. The sealing region adjoins in the longitudinal direction the guide region. The bell-shaped cross section contour in the longitudinal direction from the guide region to the sealing region is open at one side and increases strictly monotonously. The valve body is formed of a thermoplastic polyhalogen olefin. A crankcase ventilation device is provided that is provided with a valve provided with such a valve body.

Abstract: A valve body for a valve has an envelope surface with a bell-shaped cross section contour in a longitudinal direction of the valve body. The envelope surface is provided with a guide region for guiding the valve body in a valve seat and is further provided with a sealing region for contacting fluid-tightly the valve seat. The sealing region adjoins in the longitudinal direction the guide region. The bell-shaped cross section contour in the longitudinal direction from the guide region to the sealing region is open at one side and increases strictly monotonously. The valve body is formed of a thermoplastic polyhalogen olefin. A crankcase ventilation device is provided that is provided with a valve provided with such a valve body.

Abstract: A valve has a valve housing with a valve seat and a valve body holder with a fluid-permeable flow opening. A valve body is arranged in the valve body holder and axially displaceable between an open state and a closed state of the valve. The valve body has an envelope surface with a sealing region for fluid-tightly contacting the valve seat in the closed state. It has a base region adjoining the sealing region in longitudinal direction. A cross section contour of the envelope surface increases monotonously from the sealing region to the base region. In the open state, an axial end of the base region contacts the valve body holder. The envelope surface has a weakened region connecting sealing region and base region to each other. The weakened region has a reduced stiffness along the longitudinal direction. The valve body is formed of a thermoplastic polyhalogen olefin.

Abstract: A filter (10) and a filter element (18) for a fluid, particularly fuel, oil, water, air or urea solution, particularly of a combustion engine, particularly of an automobile, are described. The filter element (18) comprises a filter medium (20) through which fluid can flow. The filter element (18) further includes an electrically operated heating medium (30) that has at least one electrical resistor element with a temperature-dependent electrical resistor. The heating medium (30) is arranged in a path of flow (36) of the fluid in order to heat the fluid. The at least one resistor element includes an electrically conductive polymer composite that has a temperature-dependent electrical resistor.

Abstract: A method for creating a long superconducting wire and tape materials that can be loaded with high current densities using MgB2. The method is based on the powder-in-the-tube technology. In this process, there is a composite consisting of a cover tube made of material with normal conductivity, and a powder of a superconducting compound or a preliminary product. This powder compound contained in this cover tube, are processed by reshaping and thermal treatment steps to the superconducting wire or tape material. According to the invention, a composite is supplied to the processing process that contains a powdery superconducting MgB2 compound or a powdery preliminary product for a superconducting MgB2 compound. The powdery preliminary product, has been only partially reacted to an MgB compound, or is a powder mixture consisting of the individual components of the desired MgB2 compound. This product is filled into the cover tube.