| 摘要 |
PURPOSE:To secure safety for gas supply by a method wherein a gas flow detector and an electromagnetic valve are povided near a gas supply source and the opening angle of the electromagnetic valve is controlled by the values detected by the gas flow detector. CONSTITUTION:A gas flow detector 1 and an electromagnetic valve 2 are provided near a gas supply source to shut the electromagnetic valve 2 when detected values of the gas flow detector 1 exceed a specified value. For instance, when a large quantity of gas leakage occurs on account of gas hose slipping out of position, etc., the electromagnetic valve 2 is shut so as to stop gas leakage automatically and safety for gas supply can be secured completely. |
