| 摘要 |
A lockout device is designed for preventing unauthorized use of a valve located below ground level, the valve having a rotatable valve actuator. The device includes an elongated tubular housing of a length to have a lower end at the valve actuator and an upper end accessible generally at ground level. An encapsulating mechanism including a trap door are provided at the lower end of the tubular housing for securing the lower end to the valve and encapsulating the rotatable valve actuator, with the tubular housing being freely rotatable relative to the actuator. |
