PART NO : AB8469P                          
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Relay valves are primarily used on long wheelbase vehicles to apply and release rear axle(s) service or parking brakes. They are air operated, graduating control valves of high capacity and fast response. Upon signal pressure from the service brake valve, they graduate, hold or release air pressure from the chambers to which they are connected.

SERVICE PORT ANGLE:
180 Degree

SUPPLY PORT:
3/8" NPT

DELIVERY PORTS:
​3/8" NPT (4)

CONTROL PORT:
​1/4" NPT

CRACK PRESSURE:
2 PSI

CROSS REFERENCES:
279952, 279180, 279180X, 279730, 279730X, 279952R, D2X2654, M1567183, 7926000493, A103600, 279952B1, SA147, 936001005, 9006449, 177141, 034021, R6.
A cross reference listing means that this valve is a suitable replacement for the part numbers listed. Some changes in air line plumbing may be required.