| 摘要 |
<p>A pressure regulating and exhaust valve having an upstream port and a downstream port interconnected by a flow path. An adjustable pressure regulating valve is mounted in said flow path for regulating the downstream pressure in said flow path. The exhaust valve is a check valve that is mounted in parallel with said pressure regulating valve in said flow path for exhausting the downstream pressure from said downstream port to said upstream port.</p> |
