| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening/closing operation jig that allows an opening/closing operation to be constantly performed at a fixed torque value even if a manually operated valve has a manual-type round handle, and to provide a valve closing method that allows the manually operated valve to be closed at a fixed closing torque value by using the opening/closing operation jig.SOLUTION: Provided is an opening/closing operation jig 16 used for a manually operated valve 1 that includes a valve stem 2 for opening/closing a valve by rotational operation and a manual-type round handle 4 for rotational operation attached to the valve stem 2. The opening/closing jig 16 includes a jig body 17 having engagement members 18 which can be rotationally operated by being engaged to the manual-type round handle 4. The jig body 17 includes a rotational operation part 20 attached, in an engaged and fitted state to the manual-type round handle 4, to a torque wrench 21 positioned on a rotational shaft center L of the valve stem 2. Also provided is a valve closing method for closing the manually operated valve 1 by using the jig 16. |
