| 摘要 |
The invention relates to a valve, for regulating a flow of gas, comprising a valve body with an inlet for the gas to be regulated, an outlet for a regulated flow of a gas, a valve seat with a valve opening, a moving closure part comprising a tensioned membrane mounted inside the valve body and a plunger, adjustable with the aid of means, whose end is able to act on the membrane, causing the closure part to close and open the valve opening and regulate the flow of gas through same. In order to achieve a valve of the initially described kind with which a flow of gas can be regulated, using simple and, accordingly, inexpensive means, with great accuracy and repeatability and which forms a hermetic seal when the valve is in the closed position, the invention proposes that a rigid, flat plate (9) be arranged opposite the valve seat (8), said plate having a surface area which is at least equal to the surface area of the valve seat (8), the plate (9) being arranged in such a way that it follows the axial movements of the membrane (7) and can be tilted in relation to the plunger's (10) longitudinal axis, and the part of the plunger (10) end (13) acting on the membrane (7) has a surface area smaller than the surface area of the valve seat (8).
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