| 摘要 |
<p>A conduction space (S) is formed between a primary pressure side opening (2) and a secondary pressure side opening (3). A pressing section (12) and a pressure receiving section (13) are arranged on one side of an adjustment piston (11) that is slidably placed in an adjustment cylinder (4), where the pressing section (12) can push in a first valve body (6) and the pressure receiving section (13) receives the pressure of compressed air in the conduction space (S). The other side of the adjustment piston (11) constantly urges the pressing section (12) in a pressing direction by a pressure adjustment spring (15). When a second valve body (7) is operated exceeding a predetermined amount of movement, an operation lever (16) presses the first valve body (6). A normal- or high-pressure plug (33) and a very high-pressure plug (34) are installable on a coupler (9). When the normal- or high-pressure plug (33) is installed, the second valve body (7) can be pushed in by an amount not exceeding the predetermined movement amount, and when the very high-pressure plug (34) is installed, the second valve body (7) can be pushed in beyond the predetermined movement amount.</p> |
