| 摘要 |
<p>The valve, in the exemplary embodiment shown, comprises a gas inlet or intake valve for use with a gas compressor. It has a valve body with a gas inlet opening and a gas discharge opening, the latter for communication with the gas inlet of a compressor. A pair of concentrically-engaged pistons, relatively movable therebetween, cooperate to open, close, and throttle communication between the valve inlet and discharge openings. A first, compression spring, reactive from the valve body, urges the piston pair in a first closure disposition, to prevent gas flow through the valve body, and a second, compression spring, reactive from one of the pistons of the pair thereof, urges the other piston to a second, open disposition, to accommodate gas flow through the valve body.</p> |
