Inwards relief valves usually open at a negative differential pressure not exceeding
- 0.16 p.s.i.
- 1.2 p.s.i.
- 0.5 p.s.i.
Explanation from PART66Online
Inward relief (negative-pressure relief) valves protect the structure against the cabin pressure falling below outside pressure, for example in a rapid descent with the cabin already at low pressure. They are set to open at a small negative differential, typically not exceeding about 0.5 psi, so the structure is never highly loaded inward.
S
simontay asked · 14 Jun 2012
I thought it should be 0.5 psi
Community Comments (4)
E
Edigno92
30 Jun 2014
I'm agree with u
M
markino87
30 Jun 2014
right answer is 0.5 psi
W
watzz
2 Jul 2014
0.5psi
-correct
-correct
P
PART66Online
2 Jul 2014
Corrected.
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