What type of valve is typically used in fuel shutoff systems?

In fuel shutoff systems, a gate valve is typically employed as it is specifically designed to provide a reliable and tight seal when closed, preventing fuel flow. This type of valve operates by raising or lowering a gate within the valve body, allowing for a full flow of fuel when opened and completely stopping the flow when shut.

The ability to completely open or close makes gate valves ideal for applications like fuel shutoff where minimizing pressure drop and providing an unobstructed flow path are crucial. When closed, a well-designed gate valve will ensure that there is no leakage, which is especially important in fuel systems to avoid any hazardous situations.

In contrast, ball valves, while they also provide a good seal and are quick to operate, may not always be the first choice for applications demanding minimal flow resistance when fully open. Check valves are designed to prevent backflow and are not suitable for shutoff applications, while butterfly valves, though effective in certain flow control scenarios, may not provide the same level of sealing capability as gate valves in fuel shutoff contexts.