Bendix Commercial Vehicle Systems AD-2 AIR DRYERS 7/04 - Manual (Page 2)

2
FIGURE 2 - SECTIONAL VIEWS
AD-1 ™ AIR DRYER
The housing assembly consists of two cylindrical steel
stampings welded together. For piping convenience, two inlet
ports, one reservoir port and one purge volume port are
provided in the AD-2
™ air dryer. The side outlet port of the
AD-2 ™ air dryer incorporates an integral single check valve
with the top port used for the addition of purge volume.
(Refer to Figure 1)
A safety valve mounted in the housing assembly protects
against excessive pressure build-up within the housing.
The desiccant sealing plate assembly is located mid-way
in the housing assembly and houses a replaceable ball-type
single check. Also located in the plate assembly is the purge
orifice.
The desiccant cartridge and aluminum oil separator filter
are removable and comprise a complete serviceable unit.
The desiccant beads, which are referred to as the “drying
bed”, are a drying substance that has the unique property
of exposing a tremendous surface area in proportion to its
bulk. One pound of the desiccant beads has about two
million square feet of adsorptive area made up of a large
number of submicroscopic cavities in each bead. Each
desiccant bead adsorbs or collects moisture.
AD-2 ™ AIR DRYER
5-1/2”
19-1/2”
PURGE
VOLUME
PURGE
ORIFICE
INLET
DESICCANT
“O” RING
HEATER
PURGE
VALVE
EXHAUST
DEFLECTOR
RETAINING
RING
OIL
FILTER
MOUNTING
BRACKET
SAFETY
VALVE
“O” RING
“O” RING
CHECK
VALVE
LOCK
NUT
MOUNTING
BRACKET
OUTLET
CHECK
VALVE
OUTLET
LOCK
NUT
SPRING
RETAINER
PERFORATED
PLATE
OIL
FILTER
HEATER
THERMOSTAT
ENCLOSURE
ELECTRICAL
TERMINAL
PURGE
VALVE
CONTROL
PORT
PURGE
VALVE
PISTON
DESICCANT
CARTRIDGE
CARTRIDGE
BOLT
INLET
DESICCANT
SEALING
PLATE