What does a separation valve do?

A separation valve functions primarily to divide one engine fuel system from another. This is important in situations where multiple engines are fed from a common fuel source, as it ensures each engine receives fuel independently and maintains operational integrity. The separation created by this valve allows for isolation in case of a malfunction or fuel leak in one engine’s system, thus enhancing safety and reliability in flight operations.

In addition, separation valves are essential for managing fuel flow between different tanks or engines, enabling the crew to effectively control fuel distribution based on flight needs and optimizing the overall performance of the aircraft. This critical role supports engine efficiency and helps mitigate the risks associated with fuel system failures.