| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate installation work by reducing valves and pipes provided in a body valve. <P>SOLUTION: A stream sensing apparatus is provided halfway along piping, opens a main valve by reduction of a secondary side pressure to supply pressurized water, and outputs a stream sensing signal by a stream sensing part. A composite valve 60 is provided on a secondary side of the stream sensing apparatus. The composite valve 60 includes: a drain valve mechanism opening/closing by manual operation; and a relief valve mechanism opening when receiving the secondary side pressure exceeding a prescribed relief set pressure in a closed state of the drain valve mechanism to drain. The composite valve 60 suppresses generation of a peak pressure by incorporating the relief mechanism to a drain valve element 68 of the drain valve mechanism, for example, and performing opening-operation when the secondary side pressure exceeds the relief set pressure in the closed state of the drain valve mechanism. <P>COPYRIGHT: (C)2012,JPO&INPIT |
