Abstract:
Air dryer (10) for a compressed air system includes a desiccant canister (18) and a tubular oil filter (94) received within a cavity within the canister circumscribed by a desiccant bed (28). A tubular oil filter is mounted on a removable module (82) so that the module and the oil filter may be removed from the air dryer without disturbing the desiccant canister. Accordingly, oil filter is replaced at more frequent intervals than is the desiccant. During purging, purge air is bypassed around the oil filter directly to the exhaust port through a check valve (98) permitting communication through a bypass passage only during purging.
Abstract:
An air dryer for compressed air braking systems includes a desiccant canister (12) which is provided with a double helix insert (48) which cooperates with the walls (28, 30, 32) of the canister (12) to define a pair of intertwined, serpentine, pneumatically isolated flow paths (54, 56). The flow paths (54, 56) extend through the canister (12) between the end walls (30, 32) and are filled with a desiccant material (58). A single center line valve mechanism is provided to switch between the flow paths so that one of the flow paths is purged at the same time that the other flow path is pressurized.
Abstract:
An air dryer for compressed air braking systems includes a desiccant canister (12) which is provided with a double helix insert (48) which cooperates with the walls (28, 30, 32) of the canister (12) to define a pair of intertwined, serpentine, pneumatically isolated flow paths (54, 56). The flow paths (54, 56) extend through the canister (12) between the end walls (30, 32) and are filled with a desiccant material (58). A single center line valve mechanism is provided to switch between the flow paths so that one of the flow paths is purged at the same time that the other flow path is pressurized.
Abstract:
An air dryer for compressed air braking systems includes a desiccant canister (12) which is provided with a double helix insert (48) which cooperates with the walls (28, 30, 32) of the canister (12) to define a pair of intertwined, serpentine, pneumatically isolated flow paths (54, 56). The flow paths (54, 56) extend through the canister (12) between the end walls (30, 32) and are filled with a desiccant material (58). A single center line valve mechanism is provided to switch between the flow paths so that one of the flow paths is purged at the same time that the other flow path is pressurized.