| 摘要 |
<p>A valve, for example a valve for use in conjunction with a pneumatic pressure controller (200) for controlling a load pressure in a volume, comprises an apparatus for aligning a pressure control valve such that a seal between at least one input port (240A, 240B) and a flapper structure is created. In particular, the pressure control valve contains a structure designed to maintain the seal between the pressure input port and the flapper structure throughout a selected range of motion of the flapper. <IMAGE></p> |
