Exhaust and Relief Valves (CERV) open at what differential pressure to relieve turbine exhaust to the Auxiliary Exhaust System?

Exhaust and Relief Valves (CERV) open at what differential pressure to relieve turbine exhaust to the Auxiliary Exhaust System?

• A. 1 psi
• B. 2 psi
• C. 3 psi
• D. 4 psi

Answer: (B)

Exhaust and relief valves respond to the difference in pressure across them. When the turbine exhaust side is higher than the Auxiliary Exhaust System side by about 2 psi, the valve opens to relieve the turbine exhaust by routing gas into the Auxiliary Exhaust System. The 2 psi set point is chosen so the valve stays closed during normal operation but opens quickly enough to protect the turbine exhaust components from overpressure. Once the differential drops below 2 psi, the valve closes again.

Exhaust and relief valves respond to the difference in pressure across them. When the turbine exhaust side is higher than the Auxiliary Exhaust System side by about 2 psi, the valve opens to relieve the turbine exhaust by routing gas into the Auxiliary Exhaust System. The 2 psi set point is chosen so the valve stays closed during normal operation but opens quickly enough to protect the turbine exhaust components from overpressure. Once the differential drops below 2 psi, the valve closes again.