BENDIX AD-1 Service Data - Page 2
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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 Bendix
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 2.)
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 orifi ce.
PURGE
VOLUME
PURGE
ORIFICE
19-1/2"
INLET
DESICCANT
"O" RING
HEATER
BENDIX
Figure 2 – Sectional Views
2
®
®
AD-2
air dryer. The side
5-1/2"
OUTLET
"O" RING
FILTER
PURGE
VALVE
DEFLECTOR
®
AD-1
™
AIR DRYER
The desiccant cartridge and aluminum oil separator fi lter
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.
The desiccant beads are held in place by steel perforated
plates and fi lter cloths. The top plate is held in place
by a spring, and the bottom plate rests on a shoulder
approximately 1/8" from the bottom of the cartridge housing.
MOUNTING
BRACKET
LOCK
NUT
CHECK
DESICCANT
VALVE
SEALING
PLATE
"O" RING
INLET
SAFETY
VALVE
CARTRIDGE
BOLT
MOUNTING
BRACKET
DESICCANT
CARTRIDGE
OIL
PURGE
RETAINING
VALVE
RING
PISTON
CONTROL
PORT
EXHAUST
PURGE
ELECTRICAL
VALVE
TERMINAL
BENDIX
®
AD-2
®
AIR DRYER
CHECK
VALVE
OUTLET
LOCK
NUT
SPRING
RETAINER
PERFORATED
PLATE
OIL
FILTER
HEATER
THERMOSTAT
ENCLOSURE