What allows an operator to operate certain valves from distant locations?

The correct answer is remote operating gear, which is specifically designed to enable operators to control certain valves from a distance, enhancing safety and efficiency in various operations. This system allows for manipulation of valves without the operator needing to be physically present at the valve location, which is particularly beneficial in hazardous environments or when valves are located in hard-to-reach areas.

Remote operating gear typically includes mechanisms like cables, hydraulic systems, or pneumatic lines that connect the operator's control station to the valve. Through this setup, the operator can open, close, or adjust the valves as needed from a safe distance, ensuring continuous operation without the need for manual intervention at the valve site.

Manual override refers to the ability to take manual control of automated systems but does not inherently provide the distance operation feature that remote gear does. Automated control systems often manage processes with programmed settings but may still require proximity for valve operation unless integrated with remote gear. Pressure sensors monitor the state of fluids within systems but do not provide control capabilities by themselves; they serve as data points for operators or automated systems rather than direct control mechanisms.