1.5 1" COMBINED CUT-OUT COCK & STRAINER
PORTION
This Portion functions to assist in preventing the entrance
of dirt and/or moisture, which may be carried by air from
the brake pipe, from entering the other components of the
“26-C” Control Valve. It may also be used to close the
communication between the brake pipe and “26-C” Control
Valve.
1.6 RESERVOIR RELEASE VALVE PORTION
This manifold mounted, manually operated device functions,
when activated, to vent air under pressure to atmosphere.
It is used to vent control reservoir air to atmosphere to initiate
a brake release.
1.7 AUXILIARY OR MAIN RESERVOIR
The Auxiliary or Main Reservoir, when properly connected
through porting in the “26-C” Control Valve, provides air for
the brake cylinders, and, when used, for the brake cylinder
relay valve.
1.8 CONTROL & SELECTOR VALVE VOLUME
RESERVOIR
This two compartment reservoir is used to store air under
pressure for use in the various functions of the “26-C” Control
Valve.
1.8.1 The function of the control reservoir pressure is to
provide a reference force for movement of the service valve
in the Service Valve Portion of the “26-C” Control Valve
when a reduction occurs in the opposing brake pipe pressure.
1.8.2 The selector valve volume reservoir acts as a stablizing
volume during the operation of the selector valve during
quick service and gradulated release operations.
2.0 OPERATION (FIGURE 2)
2.1 CHARGING
2.1.1 INITIAL CHARGING
The 1" Cut Out Cock and Strainer MUST BE in the full open
position. During initial charging brake pipe air is directed
into and through the open Cut-Out Cock and Strainer and
into Passage 1 of the Pipe Bracket Portion. From Passage
1, the air flows to the following passages and chambers of
the various components of the “26-C” Control Valve:
2.1.1.1 To the emergency portion and to the chamber
above the large diaphragm.
2.1.1.1.1 Brake pipe air flows from the chamber above the