| 摘要 |
<p>A letdown valve is featured which maintains a smooth flow of furnace effluent, Liquid passing through the throat of the valve is throttled, and a portion is caused to flash to vapor. The valve is designed to allow for subsonic flow of the vapor under all process conditions. A quenching fluid is also added to the liquid passing through the throat in order to cool the liquid. The quenching fluid is directed in a manner to maintain operating freedom of the movable plug and enhance the valve service life.</p> |
