2.5 psi or if a negative pressure of 1.0 psi develops in the surge tank. Once opened, the pressure relief valve stays open until it is manually reset. This assures continued venting of each surge tank if a vent flame arrestor becomes plugged. When you pull the reset handle down it resets the pressure relief valve. You can manually open the pressure relief valve if you put a stiff rod, 2.0 inches minimum long by 0.18 inches diameter maximum, into the center ambient sense port and push up. This releases the locking mechanism and permits the poppet to spring open.
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MAINTENANCE MANUAL
FLOAT DRAIN VALVE VENT FLAME ARRESTOR
SEE A SEE D
PRESSURE
RELIEF VALVE
SEE B
DRAIN CHECK VALVE SEE C
DRAIN CHECK VALVE
SEE C PRESSURE RELIEF VALVE SEE B
VENT FLAME ARRESTOR SEE D
VENT STRINGER DOOR
FLOAT
PRESSURE RELIEF DRAIN
VALVE VALVE
FLOAT
O-RING
FLOAT DRAIN VALVE
ACCESS DOOR A
WING SKIN (LOWER SURFACE)
GASKET
(KNITTED ALUMINUM)
BOLT CLAMP RING
MOUNTING BOLT
PRESSURE RELIEF VALVE
B
Fuel Vent System Components Figure 3 (Sheet 1)
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MAINTENANCE MANUAL
TANK END RIB
DRAIN CHECK VALVE
LOWER WING SKIN
FWD RUBBER SEAL NUTPLATE
INBD
C DRAIN CHECK VALVE O-RING A
ARRESTOR FLAME THE VENT HOUSING OF
A DOOR ACCESS
MOUNTING BOLT
TUBE VENT FLAME ARRESTOR
VENT FLAME ARRESTOR D
FLAME ARRESTOR HOUSING OF THE VENT
SURGE TANK ACCESS DOOR (VENT SCOOP)
A-A
Fuel Vent System Components Figure 3 (Sheet 2)
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本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 2(21)
