| 摘要 |
A fluid control valve, of the type utilizing pressure differential across a diaphragm as the controlling parameter, is provided with a flexible diaphragm which is mounted so as to be substantially limited to flexing in a single direction. Consequent distension of the diaphragm is likewise substantially limited to a single direction. A bleed hole in the diaphragm is provided for passing pressurized fluid between the surfaces of the diaphragm for the creation of a pressure differential thereacross. The bleed hole is elongated and preferably oblong in perimeter and is oriented with its minor axis in substantial alignment with the direction of distension so that as the diaphragm material is stretched, the shape of the bleed hole becomes more nearly circular.
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