| 摘要 |
A liquid pressure control valve includes at least one 0-ring seal mounted, in a first sealing position, on a sealing section of a first component thereof to seal a junction between that first component and a second component which junction controls a bleed passage between. The 5 first component is threadingly engaged within the second component. The valve includes a chamber intended to contain liquid up to a required pressure during operation of the valve. The valve includes at least one annular impingement element mounted about a reduced diameter section, relative to the sealing section, of the first component and adjacent thereto with the impingement element. The impingement element includes a bore that tapers away from the 0 10 ring seal, whereby with a pressure in excess of the required pressure acting on the 0-ring it will be compressed at least partly into the bore of the impingement element and away from the 0 ring's first sealing position to take up a second non-sealing position and, with release of the excess pressure, return to its first sealing position. G:/0N2359AU - COMPLETE - SPEC EXCESSSAFETY_16 Dec20l3.docx CY) c~J C) |
