Easi-Test from Smith Flow Control is a novel device that permits the independent testing of pneumatic actuators and process valves on live systems. Fitted between the valve and actuator, when activated it allows independent testing and operation of the actuator or valve. Operating the Easi-Test involves the introduction of a lever tool that automatically disengages the actuator from the valve stem. The valve can then be operated like a traditional manual valve whatever the position of the actuator or the live process condition. When the valve is declutched it can be locked in any position, allowing maintenance, function testing or changeout of the actuator without interrupting the process or compromising the process management system. Removing the lever tool ensures the automatic re-engagement of the actuator and valve coupling when the actuator and valve next align – this either occurs automatically or on the next process trip. Throughout the procedure the operator maintains full manual control of the valve and, while the lever tool is engaged, the valve cannot be operated remotely.