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Selects Haldex
Air Brake
Systems

Any weakness in the air treatment system could lead to a complete system failure. Haldex Air Dryers, Oil Separators and Air Management Systems undergo severe laboratory and field testing where they are subjected to extreme environments, forces, and pressures to ensure that they will function properly under any circumstances.

Desiccant-type Dryers

Electronically Controlled Air Management

Consep Condenser/Separator

Automatic Drain Valve

Haldex offers two Desiccant-type Dryers:

Pure Air Plus

DryEST

Purpose:
Haldex Air Treatment Systems are used to remove moisture, oil and other contamination from the airflow before reaching the vehicle's air system. These contaminates can create problems with corrosive damage to air components. More severe problems can occur in cold weather when moisture can condense and cause a freeze-up.

Operation:
As contaminates enter the dryer the majority of the free water and oil are dropped from the airflow and collected in the sump area of the dryer. The moist air continues into the desiccant bed where the moisture is captured by the desiccant. When the compressor reaches its cutout pressure a signal is sent to the dryer to regenerate the desiccant bed. At this time, dry air is back-flowed through the desiccant. The dry air attracts the moisture in the desiccant and is vented to atmosphere along with the contamination in the sump.

Pure Air Plus

DryEST

Features and Benefits:
High capacity 4# desiccant cartridge
•	Can maintain dry, clean air in heavy-duty applications such as transit buses and refuse service
•	Serpentine desiccant path for longer desiccant life

Modular design
•	Dryer can be maintained on vehicle without breaking any air line connections

External purge tank
•	Allows increased purge volume for high capacity application
•	Compact light weight dryer for applications with limited space

Optional regeneration valve to eliminate purge volume
•	Reduced installation costs by eliminating purge tank on light to medium applications

Optional integrated system governor
•	Reduces application costs by eliminating installation of standard governor and related piping
•	Eliminates unloader mechanism in compressor and unloads compressor through dryer (European system)
•	Dramatically reduces oil carry-over and eliminates all possibilities of freeze-up

Integrated muffler
•	Eliminates the load burst when the dryer unloads
•	Quiets dryer for sleeper vehicles

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ECAM

Haldex Electronically Controlled Air Management (ECAM) combines the functions of the air dryer, governor and pneumatic valves into one unit, which is capable of interaction with the engine management system and other vehicle systems. The ECAM eliminates the need for multiple valves and provides a dramatic improvement in air system performance.

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Consep

Purpose:
The Haldex Consep (Condenser/Separator) is designed to condense, separate and expel the majority of the oil, water and contaminates before reaching the air system. The Consep in normally mounted before the air dryer but it can be installed as a standalone condenser/separator between the compressor and wet tank.

Operation:
As air enters the Consep it is cooled as it spirals down the baffled interior. The air changes direction and the contaminates are dropped in the sump area. The bottom of the sump is equipped with the Haldex Automatic Drain Valve (ADV). The ADV is connected through the brake light circuit and every time the brakes are applied the contaminates are ejected. 

Features and Benefits:
Removes contamination before reaching the air dryer
•	Increases air dryer desiccant life
•	Reduces vehicle downtime

Reduces the temperature of the air entering the dryer
•	Improved air dryer efficiency and performance

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Automatic Drain Valve

Purpose:
The Haldex Automatic Drain Valve (ADV) is designed to be mounted in the wet/supply tank or Haldex Consep (Condenser/Separator). This valve eliminates the need to manually drain the wet tank.

Operation:
This unique valve is operated by the brake light switch and is not dependent on the compressor cycling. Every time the brake is applied, contaminates accumulated in the ADV sump are expelled. The ADV is equipped with an integrated heater to avoid freeze-ups.

Features and Benefits:
The ADV reduces the amount of contamination entering the air system
•	Condensation is continually being flushed from the wet tank to avoid carry-over into the air system
•	Reduces air system contamination and valve maintenance
•	You no longer have to rely on someone to manually drain the wet tank

ADV operates off the brake light circuit
•	The high frequency of brake application prevents accumulation of contamination in the reservoirs

Fail safe valve, no diaphragms to cause system leakage
•	If an electrical failure occurs the valve is self sealing to prevent leakage
•	The valve features a backup manual drain valve for testing

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