| 摘要 |
<p>A drain valve (38) removes liquid from a compressed air system (20) whenever cycling pressure of the system (20) reaches either a preselected high drain pressure or a preselected low drain pressure at an inlet port (39) of the valve (38). An inlet face (79) of a piston (78) of an adjustable pressure valve assembly within a valve body normally seals the inlet port (39) when there is no pressure. The piston (78) is located within a portion of a central cavity of the valve (38). The piston's inlet face (79) is of a size which allows the force of the adjustable pressure valve assembly to be overcome by a pre-selected high drain pressure at the inlet port (39).</p> |
