| 摘要 |
<p>A communication hole 17, which communicates with a primary-side port 15 and a secondary-side port 16, is opened and closed by a valve element 21 contacting with a valve seat 18, and a spring force in a direction of contacting with the valve seat 18 is applied to the valve element 21 by a valve spring 25. A pressure-regulating diaphragm 27 is mounted in a housing 11 opposite the valve element 21, and a spring force in a direction of opening the valve element 21 is biased to the pressure-regulating diaphragm 27 by a pressure-regulating spring 43. A tip face 49 that opens and closes a relief hole 47 is provided, and a stem 47 that converts, to the valve element 21, a movement of the pressure-regulating diaphragm 27 toward the valve element 21 is provided in the valve element 21. The pressure-regulating diaphragm 27 is provided with a dynamic-vibration absorbing apparatus 50, which suppresses a vibration of the pressure-regulating diaphragm 27 at an exhausting time of being exhausted from the relief hole 37, and vibrations of a diaphragm assembly 38 and a valve assembly 26 at a pressure-regulating time.</p> |
