Fluid valve, as a proportional valve for fuel cell systems, has a structured flow channel at the sealing seat and valve head, with the housing, to control and/or switch low mass flows and switch large mass flows

摘要

The fluid valve has a flow channel (154) in the valve housing (136), with a valve seat with a sealing seat (150). A valve head (144) has movement in relation to the sealing seat, with a valve shaft (146) and a valve lifter (140) which gives the valve a selected stroke movement. A shaped passage which gives a free flow cross section as a function of the valve stroke movement, with a shape which is significantly different from a rotational symmetry, is at the sealing seat and/or the valve head zone, at the valve head and/or the valve housing. The sealing seat is circular, on a plan view, and forms an edge around the flow channel in the valve housing. The valve head has a conical surface (148) around it, where it lies against the sealing seat on the upstream side and transits into a wall section (162) over at least part of the circumference, in a shape which deviates from the conical.