| 摘要 |
<p>Hydraulic control valve of the type in which the flow passage from its flow inlet to its flow outlet is sealable by a rigid sealing, wherein the flow passage is characterized by being formed as an opening with elliptical configuration whose lengthwise axis is substantially perpendicular to the flow axis towards the valve and away from it, and a method for reducing head losses in such valves by providing their flow passage elliptically shaped as said.</p> |
