| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas shut-off valve enabling the reduction of the stock. SOLUTION: This gas shut-off valve 1 comprises a valve body 3 having a first valve seat 10A and a second valve seat 10B, a first drive part 2A for bringing a first valve element 15A into contact with or separating it from the first valve seat 10A according to the electrified state of a first coil 12A, and a second drive part 2B for bringing a second valve element 15B into contact with or separating it from the second valve seat 10B according to the electrified state of a second coil 12B. The gas shut-off valve further comprises a selector means 30 for selecting between a parallel circuit for connecting, parallel to each other, the first coil 12A and the second coil 12B and a series circuit for connecting, in series, the first coil 12A and the second coil 12B. COPYRIGHT: (C)2008,JPO&INPIT
|
