Air Dryers For Truck and
Tractor-Trailer Air Brakes

Looking for an alcohol evaporator
for your air brake system?
Get your alcohol evaporator here.

Need an air dryer for the air entering your trailer brake lines?
Use a Bendix Cyclone DuraDrain water separator.

Bendix AD-9 Air Dryers
and Aftermarket Alternatives

Part Number	Heater Voltage	Notes
GEN109685 AD9 After- market	12 VDC	1/2" NPT Supply and Delivery Ports Does NOT include bracket kit or wire harness	$149.95 Quantity:
GN109685-24V AD9 After- market	24 VDC	1/2" NPT Supply and Delivery Ports Does NOT include bracket kit or wire harness	$199.95 Quantity:
GEN065225 AD9 After- market	12 VDC	1/2" NPT Supply and Delivery Ports Complete kit, includes bracket and wire harness	$199.95 Quantity:
GN065225-24V AD9 After- market	24 VDC	1/2" NPT Supply and Delivery Ports Complete kit, includes bracket and wire harness	$249.95 Quantity:
065225 AD-9 Genuine Bendix	12 VDC	1/2" NPT Supply and Delivery Ports Complete kit, includes bracket and wire harness	$260.94 Quantity:

We can special order any current Bendix air dryer you might need including the AD-2, AD-9, AD-SP, AD-IP, and AD-IS models.

Meritor WABCO System Saver Air Dryers
and Aftermarket Alternatives

Part Number	Heater Voltage	Notes
GENR955205 1200 After- market	12 VDC	Looking to save some money? Choose this aftermarket alternative to the Meritor WABCO air dryer. Has system regeneration valve	$199.85 Quantity:
R955205 1200 Genuine WABCO	12 VDC	Has system regeneration valve	$288.75 Quantity:
R955206 1200 Genuine WABCO	24 VDC	Has system regeneration valve	$342.11 Quantity:
R955210 1200U Genuine WABCO	12 VDC	Special application for unloaded compressors Has system regeneration valve	$545.02 Quantity:
R955300 1200P Genuine WABCO	12 VDC	Uses an external purge tank for system regeneration Does NOT have a system regeneration valve	$358.62 Quantity:

How the Meritor WABCO 1200 air dryer works

During system pressure build-up, compressed air passes into the air dryer where the filter system removes contaminants and passes the air into the drying stage.

Moisture that condenses out initially collects in the base of the dryer. Moisture-laden air passes through the desiccant bed in the air dryer cartridge and is dried. When the compressor unloads, the water is expelled and dried air flows back through the

A Typical Meritor WABCO Air Dryer Cycle:

1. The governor turns the compressor on when supply tank pressure drops below cut-in pressure (approximately 100 psi).
2. Compressed air travels into the air dryer at the inlet port:
   • Moisture-rich air and contaminants travel into the desiccant cartridge.
   • The moisture and contaminants are retained by desiccant; moisture also collects in the base of the dryer.
3. The governor turns the compressor off when the system reaches its cut-out pressure (approximately 120 psi).
4. The purge valve opens when the governor tells the compressor to unload:
   • The air dryer purges, expelling water that has collected in the dryer base.
   • Then the regeneration valve opens:
     • Dry system air flows back through the dryer. 10 psi is taken from supply and secondary tanks.
     • This back flow dries the desiccant, preparing it for the next cycle.

Special Order Air Dryers

We can special order many air dryers. Call or email us for a quote today. Let us know if you don't see your dryer listed below. We can probably get it too!