71
ECS Gen. 1
Overflow valve
52a - no return
flow
Valve 52a ensures that air is fed to the brake system before
the air suspension system.
The valve opens at 6.7 to 7.0 bar, to allow air into the
suspension system.
Valve 52b is fitted only on trucks with ʻfullʼ air suspension -
i.e. at front and rear, which have a separate air suspension
tank (50).
To ensure that the vehicle reaches correct ride height as
soon as possible, valve 52b feeds air to fill the air bellows
before allowing air to suspension air tank (50)
The valve opens at 10.0 to 10.4 bar, to allow air into the
suspension air tank.
If the pressure is lower at inlet (1) than at outlet (2), the
valve allows return flow from outlet (2) to inlet (1), via non-
return valve (3).
Overflow valve
52b - with return
flow
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