| 摘要 |
<p>A pressure regulator 24 includes a body (30, fig 2) having an internal cavity for receiving a pressurized medium and inlet and outlet ports 48, 52 that enable a pressurized medium to enter the internal cavity at a first pressure and exit at a second pressure. A control piston, which may comprise a supply piston 64 and a vent piston 68, is disposed within the internal cavity and moves in response to a change in pressure within the internal cavity. The regulator 24 has a curved outer edge 134 of an aperture 128 has a curvature that is identical to that of an inner circumference or perimeter of a lip of seal ring 84 such that a portion of a perimeter of the ring 84 is coincident with the curved outer edge 134 when pressure within the pressure regulator 24 is equal to a first pressure threshold. The curved inner edge 132 may have a rate of curvature that is identical to an outer circumference of the seal ring 84. Other embodiments of pressure regulators and systems are also provided.</p> |
