🔍 Key Concepts

• Bleed air surge relief valve purpose in high-pressure air or gas systems • Difference between surge relief and overpressure protection functions • How a valve that protects against sudden pressure spikes should behave when pressure starts to fall

💭 Think About

• Think about what a surge is: is it a slow, gradual increase in pressure or a sudden spike? How should a valve react to that? • For a system that must stay protected during a surge, is it better for the valve to open a little at first or snap fully open at a set pressure? Why? • Once the pressure begins to drop from the peak, should the valve close right away or stay open until the system is clearly back in a safe range?

✅ Before You Answer

• Compare options that say gradually opens versus opens completely and ask which is more effective against sudden surges. • Compare options where the valve remains open until a preset lower pressure versus closes immediately as soon as the pressure begins to drop. • Eliminate any choice that does not sound like it would reliably protect the system during the entire surge event.