BENDIX BW2811 Dépliant

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In the past, you didn’t need to think too much about 
your air dryer. You could get by with “good enough.”  
You could simply “wait and see” before committing to 
advancements like oil coalescing technology.  
But those days are now gone.
 
 
Whether you’re an OE, fl eet, or owner-operator, you 
operate in a world of increasingly strict emission 
standards and higher costs of running your business.  
EPA regulations in 2007 and 2010 dramatically reduced 
the allowable diesel engine emissions of nitrogen oxides 
(NOx) and particulate matter (PM). 
How much are you willing to risk?
Proven Bendix
®
 PuraGuard
®
 Oil Coalescing Technology
WABCO
Experience peace of mind with PuraGuard
®
Bendix
®
 AD-IP
®
 
Air Dryer Cartridge
Bendix
®
 AD-IS
®
,
 
AD-SP
®
 
or AD-RP
 Air Dryer Cartridge
The Mark of Assurance.
For better air dryer performance, non-oil coalescing cartridges can 
be upgraded to the Bendix
®
 PuraGuard
®
 oil coalescing cartridge. 
However, if the Bendix
®
 PuraGuard
®
 oil coalescing cartridge is an 
OE Standard it must be replaced with a like unit. 
Manufacturers responded to EPA ’07 and ’10 with major 
technical advances to their vehicle systems. These 
advances – including Advanced Exhaust Gas Recirculation 
(EGR), Selective Catalytic Reduction (SCR), and the Diesel 
Particulate Filter (DPF) – have added a total of $10,000 to 
$15,000 to the cost of each commercial vehicle. As costs 
rise, so does the pressure to protect your investment.
When air contaminated with oil is sent into these 
systems, you risk considerably shortening its life and 
possibly spending a great deal to repair it.
clean dr
y air
First Phase: 
Skin Cooling - Lowers the temperature, converting aerosols to liquid
Second Phase: 
PuraGuard
®
 Treatment - Coalesces and collects oil particles, protecting the 
desiccant from contamination
Third Phase:
 
Recyclable desiccant removes moisture by adsorption
Compare to: 
 
WABCO Air System Protector oil coalescing technology that 
places the oil separator AFTER the desiccant — see the results 
comparison on the next page.
Laboratory tests show that Bendix air dryers with PuraGuard
®
 oil coalescing technology signifi cantly outperform 
the WABCO
®
 SS 1200 air dryer cartridge with coalescing fi lter.
Key Design Differences
Bendix
®
WABCO
®
Results from using a Bendix
®
 
PuraGuard
®
 oil coalescing cartridge
Coalescing media location
Before desiccant
After desiccant 
Desiccant oil fouling prevented, 
moisture removal maximized
Purge air flows through 
coalescing media
N
Y
Coalescing media life and 
effectiveness increased
Oil Coalescing Air Dryer Comparison
Oil removal of Bendix air dryers with PuraGuard
® 
oil coalescing cartridges vs. WABCO
®
 SS 1200 air dryer 
cartridge with coalescing filter
 AD-IS
® 
air dryer  
200x better
 AD-IP
® 
air dryer 
30x better
 AD-9
® 
air dryer 
3x better
(Based on 150k miles, 3000 hr operational year, compressors 
with oil-carry-over of 3.0 g/hr)
Oil Not Removed b
y Dr
yer (g
rams)
1000
900
800
700
600
500
400
300
200
100
0
Oil Not Removed by 
WABCO 
SS 1200 air dryer 
cartridge with 
coalescing fi lter 
Oil Not Removed 
by Bendix
®
 AD-IS
®
 
Air Dryer with 
PuraGuard
®
 oil 
coalescing
200 Times more 
Effective
Is it a PuraGuard
®
To be sure, look for the medallion on the top of the air 
dryer cartridge or for the PuraGuard
®
 logo on the side.
Bendix
®
 AD-9
®
Air Dryer Cartridge
Preventive Maintenance – as easy as 1-2-3
Adhering to a strict preventive maintenance schedule is crucial to keeping a vehicle’s 
air system clean and ensuring superior performance. Depending on vocation, Bendix 
recommends a 1, 2 or 3 year air dryer cartridge replacement on vehicles equipped with 
a Bendix compressor. For severe service applications, such as residential refuse trucks 
or school buses, the air dryer cartridge should be replaced every year or 100,000 miles; 
for pick-up and delivery operations, or for double- and triple-trailer line haul trucks, 
every two years or 200,000 miles is the recommendation. Line-haul operations using a 
single trailer should swap the filter out every 3 years or 300,000 miles. (Recommended 
intervals for trucks equipped with non-Bendix compressors are 6 months (50,000 miles), 
1 year (100,000 miles) and 2 years (200,000 miles), respectively.)
More frequent intervals may be required depending on a vehicle’s age, its compressor 
condition, the operating environment, the vehicle’s vocation, and its usage. In conjunction 
with the guidelines, fleets can determine the functionality of their filters by checking for 
moisture in the air brake system monthly. If moisture is present, the air dryer cartridge 
may require replacement. Reference the Bendix Service Data Sheet of the specific air 
dryer for additional information.