| 摘要 |
Gas pressure regulator for reducing relatively high storage pressure (e.g., 6,000 p.s.i.) to a conventional (e.g., 2,500 p.s.i. or less) working pressure, in which the means controlling fluid flow between input and output includes a differential area valve, the larger area of which is exposed to the input pressure, and the lesser area of which is exposed to the input pressure, with an area of intermediate size exposed to the pressure of a relatively fixed volume of gas acting on the differential valve in major degree counter to the action of the output pressure on the larger area of the differential area valve. The pressure on said fixed volume is adjusted upward by manually admitting more gas from the input, and adjusting downward by manually releasing gas therefrom either to the output side or to the atmosphere. A coil spring adds to the force applied by the gas at the larger area of the differential valve, thereby tending to maintain closed the passage between input and output; and a valve controlling flow from input to output has input pressure applied to it in such manner as to add the force on said differential valve, tending to open the passage between input and output.
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