Air Brakes and Train Handling Rules - Alaska Railroad

67 Car Equipment and ComponentsNOTE: The quick service feature was introduced with the ABbrake valve and is incorporated in all freight car control valvesdeveloped since 1933.B. Accelerated Service ReleaseThe accelerated service release feature:• Is triggered by the release of a 10 psi or greater brake pipereduction• Rapidly transmits the brake release serially through the train• Reduces train brake release times by 50 percent, which reducesin-train forces and allows a running release at lower speeds onlong trainsNOTE: This feature is available on ABD, ABDW, and newercontrol valves.C. Accelerated Service ApplicationThe accelerated service application feature:• Allows additional brake pipe air to vent at each car during eachservice brake application• Results in faster service applications• Reduces in-train forces• Shortens stopping distancesNOTE: This feature is available on ABDW and newer controlvalves.67.9 Two-Compartment ReservoirThe two-compartment reservoir houses the auxiliary and emergencyreservoirs. An internal concave plate separates the two reservoirs.June 1, 1996 ARRC Air Brakes and Train Handling Manual 67-9