| 摘要 |
<p>In a gas control valve 1 to perform open-close operations of a flow rate control valve 11 and a safety valve 12 with one motor 28, a rotary shaft of the motor 28 is set at a position being offset from an extension line of a movement axis of an operation rod 18, so that the operation rod 18 is advanced by reversely rotating the motor 28 and is retracted by forwardly moving the motor. Consequently, a rotational angular range of the motor 28 for advancing the safety valve 12 with the operational rod 18 and a rotational angular range of the motor 28 for retracting the safety valve 12 are overlapped and a flow rate control range can be widened by narrowing a safety operation range by the overlapped amount.</p> |
