| 摘要 |
<p>A pressure regulator valve comprising a housing having formed therein inlet and outlet chambers and an intermediate zone effecting communication between the chambers, a tubular sleeve slideable in the outlet chamber within a narrow annular flange integral with the housing and into and out of the intermediate zone so as to vary the available through-flow cross-section for fluid flow from the inlet chamber via an effective annular region into the intermediate zone, said sleeve, apart from a narrow length thereof adjacent said flange, being spaced from the walls of the housing so as to define therebetween regions to which the fluid has free access, a pressure displaceable element coupled to the sleeve while allowing for fluid flow through the sleeve and sealingly displaceable within a port located in the housing upstream of said sleeve and being exposed to a controlled pressure zone, biasing means acting on said element so as to bias the sleeve into said outlet chamber, a valve seating mounted in the housing and adapted to be engaged in end-on, substantially line contact by the adjacent sleeve edge so as to close the intermediate zone to throughflow, and means for limiting the axial displacement of the sleeve or the element in a downstream direction, the arrangement being such that said throughflow passes out of said outlet chamber via said sleeve.</p> |
