Bendix 109685PGX Air Dryer AD9

The function of the Bendix® AD-9® and AD-9® PG (with PuraGuard® coalescing filter) air dryers is to collect and remove air system contaminants in solid, liquid, and vapor form before they enter the brake system.

The function of the Bendix® AD-9® and AD-9® PG (with PuraGuard® coalescing filter) air dryers is to collect and remove air system contaminants in solid, liquid, and vapor form before they enter the brake system. They provide 1 clean, dry air to the components of the brake system which increases the life of the system and reduces maintenance costs. Daily manual draining of the reservoirs is eliminated.

The Bendix® AD-9® and AD-9® PG (with PuraGuard® coalescing filter) air dryers each consist of a desiccant cartridge and a die cast aluminum end cover secured to a cylindrical steel outer shell with eight cap screws and nuts. The end cover contains a check valve assembly, a safety valve, three threaded air connections, and the purge valve housing assembly. The removable purge valve housing assembly incorporates a purge valve mechanism and a turbocharger cut-off feature that is designed to prevent loss of engine “turbo” boost pressure during the purge cycle of the Bendix AD-9 and AD-9 PG air dryers. For ease of serviceability, the desiccant cartridge and discharge check valve assembly are screw-in types. The purge valve housing assembly – which includes the heater and thermostat assembly – and the discharge check valve assembly, are serviceable from the exterior of the air dryer; servicing the screw-in desiccant cartridge requires removal of the air dryer assembly from the vehicle. The AD-9 PG air dryer appears identical to the standard AD-9 air dryer, but contains a coalescing media at the inlet of the desiccant bed. This coalescing media provides a higher level of oil removal over the standard AD-9 air dryer. The AD-9 PG air dryer has all the same functions of the standard AD-9 air dryer, and is used where oil is contaminating downstream components. The Bendix AD-9 PG air dryer can be identified by the PG label located on the air dryer housing.

Air Dryer Type: Stand-Alone
Body Mounting: .425 Hole with ⅜-24 UNF-2A Bolted joint (8x)
Supply Port: ½-14 NPT
Control Port: ¼-18 NPT
Delivery Port 1: ½-14 NPT
Purge Exhaust Port: Open
Purge Valve Type: Hard Seat
Purge Volume: Standard
Safety Valve Opening Pressure: 200 PSI
Heater/Thermostat Rating: 12V/75W
Heater Connector Type: Metri-Pack 280 Series 2-Way Sealed Connector (Male)
Heater Connector Color: White Cartridge Type: PuraGuard (Coalescing)
Cartridge Thread: ⅝-11 UNC-2A
Cartridge Stabilizer Ring Included: No
Clearance to Remove Cartridge: 11.00 IN
Governor Included: No
Maximum Inlet Temperature: 160°F (71°C)
Minimum Operating Temperature: -40°F (-40°C)
Cautionary Note(s): Do not replace PG cartridge with Standard/GC cartridge.