| 摘要 |
<p>PCT No. PCT/JP97/04796 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Dec. 24, 1997 PCT Pub. No. WO98/30944 PCT Pub. Date Jul. 16, 1998A pressure reducing valve 30 comprises a body unit 32, a bonnet unit 36, and an operating unit 38 having a handle 126. The pressure reducing valve 30 further comprises a first diaphragm 84, a second diaphragm 86, a third diaphragm 100, and a fourth diaphragm 102 which are provided to extend in the body unit 32 while being separated from each other by predetermined spacing distances, and a nozzle 106 and a flapper 110 which are arranged in a third diaphragm chamber 116.</p> |
