BENDIX AD-IS - Service Data - Seite 2
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OIL COALESCING FILTER
(BENDIX
AD-IS
®
®
OIL COALESCING AIR DRYER)
DELIVERY
CHECK VALVE
PURGE
CONTROL
CHANNEL
GOVERNOR
UNLOADER
PORT
SUPPLY
PORT
PURGE VALVE
(CLOSED)
ENGINE
COMPRESSOR
®
FIGURE 2 - BENDIX
AD-IS
The Bendix
®
AD-IS
®
PuraGuard
has an identical appearance to the standard AD-IS
dryer, but contains a coalescing media at the inlet of the
desiccant bed. The coalescing media provides a higher
level of oil removal over the standard AD-IS air dryer.
The AD-IS PuraGuard oil coalescing air dryer has all of
the same functions as the standard AD-IS air dryer and is
used in applications where lower oil concentration levels
are required.
Important! When servicing, note that standard AD-IS
air dryers or air dryer cartridges may be serviced with
PuraGuard oil coalescing air dryers or cartridges, however,
PuraGuard oil coalescing air dryers or cartridges must only
be serviced with like replacements.
2
DESICCANT
BED
PURAGUARD
®
(OPEN)
TURBO
SAFETY
CUT-OFF
VALVE
VALVE
(OPEN)
SECONDARY
PORT (SEC)
TURBO
SEE
NOTE 1
®
AIR DRYER AND RESERVOIR SYSTEM CHARGE CYCLE
®
oil coalescing air dryer
PRESSURE
PROTECTION
VALVES
A
B
C
PRIMARY
PORT (PRI)
PRIMARY
RESERVOIR
AUXILIARY PORTS
(TO ACCESSORIES)
Note: Unless otherwise stated in this manual, AD-IS air
®
air
dryer and reservoir systems refers to both the standard and
PuraGuard oil coalescing air dryer and reservoir systems.
The function of the pressure protection valves is to protect
each reservoir from a pressure loss in the other reservoir or
a pressure loss in an air accessory. Each of the pressure
protection valves in the AD-IS air dryer and reservoir
systems may have different pressure settings. These are
factory set and must not be changed or adjusted.
The air dryer and reservoir system consists of a "spin on"
desiccant cartridge secured to a base assembly. The
base assembly contains a delivery check valve assembly,
Note 1:
The Bendix
®
AD-IS
®
air dryer and reservoir system
purge piston has a purge control channel drain. This
allows any condensation in this area to fl ow past a
diaphragm in the top of the purge piston and out
through a channel in the middle of the central bolt of
the purge assembly to be drained. During the purge
cycle this drain is closed.
PURGE
PURGE
RESERVOIR
ORIFICE
D
PURGE
RESERVOIR
DRAIN VALVE
SECONDARY
RESERVOIR
DIAGRAM SHOWS ALL PRESSURE
PROTECTION VALVES OPEN.