IML valve actuator lock
Disable your actuated valves during maintenance
A mechanical interface between actuator and valve
see The IML valve actuator lock interfaces between the actuator and its host valve. It has a blocking mechanism that prohibits valve movement when the operating key is inserted. The key may be part of an operating process, whereby the power source is interlocked with the IML actuator lock. This ensures that the power source and the actuator are operated in the correct order.