| 摘要 |
<p>A radial flow non-return fluid valve assembly is disclosed which comprises a housing (12) including a cylindrical wall (13), and a circumferentially elongated opening (16), or a row of circumferentially spaced openings (16), in the wall (13) for enabling fluid to flow from an entrance side to an exit side of the wall (13), and a cylindrical spring collar (18) of circular cross section located on the exit side (14) of the wall (13). The resilience of the collar (18) acts in a direction to urge the collar (18) into contact with the exit side (14) of the wall (13) so as to obstruct the opening(s) (16) when the fluid pressure at the exit side is equal to or greater than the pressure on the entrance side, and the collar (18) is deformed when the fluid pressure at the entrance side exceeds the fluid pressure at the exit side to uncover the opening(s) (16) in order to allow fluid to flow through the openings in the wall (13). In the invention, one circumferential end of the collar (18) is anchored to the housing to leave a single span of the collar (18) free to separate from the exit side (14) of the wall (13), the length of which span extends over at least 60% of the circumferential length of the exit side (14) of the wall (13).</p> |
