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BENDIX SD-08-2417 Manuale Utente

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The air dryer consists of a “spin on” desiccant cartridge 
secured to a base assembly.  The base assembly contains 
a delivery check valve assembly, safety valve, heater and 
thermostat assembly, pressure protection valves, threaded 
air connections, and the purge valve assembly.
The removable purge valve assembly incorporates the 
purge valve mechanism and a turbocharger cut-off feature 
that is designed to prevent loss of engine “turbo” boost 
pressure during the purge cycle of the Bendix
®
 AD-IS
®
 air 
dryer. For ease of maintenance, all replaceable assemblies 
can be serviced without removal of the air dryer from 
its  mounting  on  the  vehicle.    Refer  to  the  Preventative 
Maintenance section.  
These units will not operate properly with a Holset-type 
compressor.    For  discharge  line  unloaded  compressors 
a three way valve must be installed upstream of the air 
dryer.  Contact Bendix Commercial Vehicle Systems for 
additional information.
BENDIX
®
 AD-IS
®
 EVERFLOW
®
 ASSEMBLY 
OPERATION  
GENERAL (Refer to Figure 2)
The Bendix
®
 AD-IS
®
 EverFlow
®
 assembly is designed to 
receive compressed air from the vehicle air compressor.  
It then cleans and dries the air before delivering it to 
the vehicle’s primary reservoir, secondary reservoir and 
accessories. Additionally, the AD-IS EverFlow assembly 
controls the compressor/dryer charge cycle. 
FIGURE 2 - 
BENDIX
® 
AD-IS
®
 AIR DRYER SYSTEM SCHEMATIC
Note:
The Bendix
®
 AD-IS
®
 air dryer purge piston has a purge control 
channel drain. This allows any condensation in this area to flow 
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.
Bulk Tanker
Secondary
 Reservoir
Primary 
 Reservoir
CTI System
Pressure 
Protection Valve
IN
CON
OUT
From 
Engine
CON
RES
CON
Bendix
®
 AD-IS
®
 
EverFlow
® 
Assembly
Schrader 
Valve
CON
RES
CON
GOV
3/8"
1/2"
1/2"
1/4"
CON
Bulk Offload CTI
Dryer OUT
Check 
Valve
Supply 
IN
SEC
PRI
Supply 
IN
CON
Manual Valve
Accessories
Compressor
Bendix
®
 EverFlow
®
 Electronic Module
Governor
Compressor 
OUT
CON
EverFlow
®
IN
Discharge Line 
Unloader Valve 
Bendix
®
 
AD-IS
®
 
Air Dryer
AD-IS
 
Air Dryer