Diff between Outflow valves and Positive/Negative Pressure valves?
Hi,
I understand how the outflow valve works. But there's very few reference written on the positive and negative pressure relief valves. Done some search and it seemed to be outflow valves and positive pressure relief valves perform the same roles?
I'm just thinking why is there a need for positive pressure relief valve if outflow valve can perform the task. For redundancy? Or is my understanding wrong? How about the negative pressure relief valves?
How about the delta P? I know there's a specific value that the aircraft cant exceed. How do we recover from an exceedance of Delta P?
Can somebody enlighten me? Thabks for your time.