Patent ID: 7727313

Claim:
An air dryer for a vehicle air system, the air dryer including a body and a desiccant canister, the body having an inlet to receive air from an air source, an outlet to supply air to a vehicle air system, a purge outlet and a regeneration inlet to receive regenerative airflow from the vehicle air system, wherein the body is further provided with a chamber containing a coalescing means positioned between the inlet and the desiccant canister, and a bypass valve positioned between the chamber and the purge outlet, the coalescing means and bypass valve being arranged such that during normal operation air entering through the inlet passes through the coalescing means before reaching the desiccant and during regeneration of the desiccant a portion of the regeneration flow passes through the coalescing means and the remainder of the regeneration flow bypasses the coalescing means through the bypass valve, wherein the chamber and coalescing means are fully provided within the air dryer body.