* On/Off: The simplest type, allowing fuel to flow or completely blocking it.
* Variable Flow: More sophisticated valves allow for adjusting the fuel flow rate, often used for regulating fuel delivery based on demand or other factors.
Essentially, the fuel valve acts as a gatekeeper, ensuring that fuel reaches the combustion chamber or other destination only when needed and in the appropriate amount. This is crucial for safety (preventing leaks and fires), efficiency (preventing wasted fuel), and proper operation of the fueled device.
