| 摘要 |
<p>PCT No. PCT/GB92/02024 Sec. 371 Date Jun. 17, 1994 Sec. 102(e) Date Jun. 17, 1994 PCT Filed Nov. 3, 1992 PCT Pub. No. WO93/09483 PCT Pub. Date May 13, 1993Gas pressure control apparatus comprises a pressure body having a lid at the top, and divided into an inlet chamber partially bounded by the lid and communicating through a port with an outlet chamber. The inlet chamber contains a valve stack including a slam-shut valve and a pair of pressure regulating valves. The valve stack is held together by bolts, and is mounted on the lid by the bolts sliding through holes in a disc forming part of the lid. Springs urge the valve stack against the port in an essentially planar manner to maintain a good seal between the valve stack and the port.</p> |
