| 摘要 |
PURPOSE:To reduce the number of wiring cables and facilitate the wiring work and achieve the cost reduction by changing over the indication of valve open/ shut indicating parts by means of the switching operation of detecting switch after the solenoid has been turned on. CONSTITUTION:When a solenoid 6 is excited to start by completing the close of an operating switch 8, high pressure gas in a bomb 10 filled with high pressure gas is supplied to a cylinder 12a of a valve driving mechanism 12 to turn the shaft 14a of a ball valve 14. A lever 15 turning unitedly together with the shaft 14a changes over a detecting switch 5 from ON to OFF condition. A control circuit 1 in which the solenoid 6 and the detecting switch 5 is connected by two lines of cables 2 and 3 is constituted so as to be a circuit which changes over the indication of valve open/shut indicating parts L4d1 and L2 displaying the open or shut condition of the valve part.
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