Which valve drains residual fuel from the combustor at shutdown or after a false start?

Which valve drains residual fuel from the combustor at shutdown or after a false start?

• A. Vent valve
• B. Burner drain valves
• C. Fuel pressure relief valve
• D. Diffuser bleed valve

Answer: (B)

The concept here is removing leftover fuel from the combustor to prevent ignition of any fuel that remains after shutdown or a false start. The device designed for this purpose is the burner drain valve. It provides a path to purge residual fuel from the combustor and fuel lines, usually to a safe drain or return line, so nothingpooling could ignite when the system restarts or if a false start occurs. Vent valves are for releasing pressure or venting air, not for draining liquid fuel from the combustor. A fuel pressure relief valve serves to limit excess fuel pressure in the supply line, not to empty the combustor. Diffuser bleed valves manage high-pressure air in the compressor to prevent surge, not fuel draining.

The concept here is removing leftover fuel from the combustor to prevent ignition of any fuel that remains after shutdown or a false start. The device designed for this purpose is the burner drain valve. It provides a path to purge residual fuel from the combustor and fuel lines, usually to a safe drain or return line, so nothingpooling could ignite when the system restarts or if a false start occurs.

Vent valves are for releasing pressure or venting air, not for draining liquid fuel from the combustor. A fuel pressure relief valve serves to limit excess fuel pressure in the supply line, not to empty the combustor. Diffuser bleed valves manage high-pressure air in the compressor to prevent surge, not fuel draining.