| 摘要 |
<p>1321496 Valves SCOVILL MFG CO 14 July 1971 [17 July 1970] 33131/71 Heading F2V In a fluid pressure regulator, the valve member 30 is formed with a central bore having two different circular portions 36, 38 interconnected by a tapering portion 40. The bore accommodates the lower part of the valve member stem 46, which lower part is formed with a hexagonal portion 48 which rests on, and is forced against the tapered bore portion 40 by way of a spring clip 52 acting between the valve member 30 and a reduced portion 50 of the valve stem 46, that portion of the stem which is contained within the narrow bore portion 38 being of a lesser diameter than the bore portion 38. Accordingly, the co-operating parts of the valve member and of the lower part of the stem define a leakage flow path extending between the outlet side of the valve and a balancing chamber 28 defined by co-operating parts of the valve member and of a flange upstanding from a screwed housing portion 26. The upper portion of the stem co-operates with a vent opening 18 formed in the diaphragm, the latter being urged on to the stem by a spring 54. The lower side of the diaphragm completes a chamber 44 which is in constant communication with the valve outlet 22 by way of a passage 43.</p> |
