Rotork has launched the IQT Shutdown Battery to provide further operational flexibility to the IQT3 range of part-turn 1-phase, 3-phase and DC electric actuators with the addition of a new integral battery option that provides fail-to-position functionality in explosion-proof applications. This pre-programmed movement of the valve on loss of power or communications means our customers retain important control over their operations during a power outage or Emergency Shut-Down (ESD). This is the first time that the IQT3 has been offered with a shutdown battery option in an explosion-proof design. A lithium-ion battery supplies the potentially vital backup power from within the actuator enclosure. The integral battery pack provides a compact, explosionproof shutdown solution.
In the event of mains power loss, the Shutdown Battery can continue to function automatically to a site configurable end of travel safe position, providing fail-to-position functionality on critical valves. The failure mode can change depending on customer requirements. This fail-to-position can be fail-closed, open, stay-put or go-to-a-per-cent position, depending on what fail-to-position action is needed to ensure the process fails to a safe operating state. This means the process finishes in a safe operating state, preventing any safety issues and avoiding monetary consequences due to loss of control. With the Shutdown Battery there is no need for additional back-up systems, such as compressors, to provide this functionality. The IQT Shutdown Battery also features an Uninterruptible Power Supply (UPS) mode. This ensures that there is continued control and operation of the actuator on loss of mains power until the battery charge has run out. Operations can continue as normal while the battery charge lasts, mitigating the risk of deferred or lost revenue due to power outages. Solar-powered installations are increasingly required for remote installations, such as pipeline pump stations. Here, the IQT Shutdown Battery mitigates fluctuating solar power and eliminates the need for expensive external batteries.