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RESERVOIR

45<>60 PSI

CHAMBERS

HOLDING

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RE-6

0 PSI

RE-6NC

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FIGURE 5 RE-6

& RE-6NC

HOLD POSITION

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RE-6

& RE-6NC

VALVES CHARGING HOLD

POSITION

In the RE-6

™

valve, as pressure increases in the reservoir,

the emergency piston is being pushed toward the seat on

the inlet and exhaust valve. When the emergency piston

reaches the seat of the inlet / exhaust valve, air is trapped

between the new seal and the chambers, holding the

chambers in the apply position. The check valve in the

RE-6

™

valve will continue to remain open, charging

the reservoir. In the RE-6NC

emergency piston, but there is still 0 psi in the reservoir

and the chambers. Air is also acting on the piston in the

PR-4

™

valve, but still has not reached the opening pressure

of 70 psi. Refer to Figure 5.

CHARGING THE RE-6

ABOVE 60 PSI

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In the RE-6

valve, as pressure increase beyond 60 psi, the

emergency piston and the inlet / exhaust valve, move from

the seat of the primary piston, opening the exhaust valve to

atmosphere allowing the service chambers to be exhausted.

The air will ﬂ ow from the service chambers, back through

the RE-6

™

valve and out the exhaust of the RE-6

EMERGENCY

SUPPLY

45<>60 PSI

Relay Valve

45<>60 PSI

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Relay Valve

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RELAY VALVES CHARGING

™

valve, air is acts on the

™

& RE-6NC

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VALVES

RESERVOIR

60 PSI

CHAMBERS

0 PSI

FIGURE 6 RE-6

ABOVE 60 PSI

allowing drive away. In the RE-6NC

upon the emergency piston, but there is no pressure in the

reservoir and the chambers. The emergency piston and

inlet / exhaust valve have moved to the exhaust position,

opening the exhaust portion of the valve to atmosphere.

™

The PR-3

allowing air to ﬂ ow to the reservoir. Refer to Figure 6.

CHARGING THE RE-6NC

Once system pressure reaches 70 psi, the PR-3

reservoir control valve will open charging the reservoir(s).

Simultaneously the emergency piston and inlet / exhaust

valve of the RE-6NC

of the primary piston (keeping the exhaust valve open to

atmosphere). This is the major difference between the

RE-6

™

valve and the RE-6NC

allows for quicker drive away, since the reservoir does not

need to be ﬁ lled before the brakes are released. Refer to

Figure 7.

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valve,

0 PSI

™

RE-6

Relay Valve

0 PSI

™

RE-6NC

Relay Valve

™

& RE-6NC

™

RELAY VALVES CHARGING

™

valve remains closed until reaching 70 psi,

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VALVE ABOVE 70 PSI

™

valve is kept away from the seat

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valve. The RE-6NC

EMERGENCY

SUPPLY

60 PSI

valve, air is still acting

™

valve