Donaldson Endurance air filters deliver
Longer Engine Life
Longer Filter Life
Ideal for Extended Maintenance Intervals
Double Mileage Guarantee
Donaldson Endurance Air Filters with exclusive
nanofiber technology offer longer engine life, longer filter life,
initial efficiency up to 99.99 percent and five times more capacity.
The nanofiber technology causes submicron contaminants
to be held on the surface layer of smaller fibers. This filtration
characteristic is only possible with this new type of air filtration
technology. In on-highway applications, where the contaminant
is primarily submicron in size, Donaldson Endurance filters cause
less restriction than conventional filters with cellulose media.
The smaller interfiber spaces of nanofiber technology have a higher
efficiency and capture more contaminant.
The following illustration may help visualize
these phenomena: Imagine two filters, a chain link fence and a
mosquito net, with a tennis ball being a dirt particle. As you
may have observed, a tennis ball will fit quite nicely into an
opening of a chain link fence, but will obstruct the hole almost
100%. Now imaging the same tennis ball covering a mosquito net.
The tennis ball, at the point of contact with the netting, will
obstruct much less filter area than the chain link fence example.
In fact, air will flow around the tennis ball all the way to the
point of contact. It will take many more particles to obstruct
the netting surface area than the chain link fence.
Donaldson Endurance air filters are
guaranteed to deliver twice the miles between change intervals
over cellulose air filters for on-highway applications or customers
receive a new filter at no charge.
With Nanofiber vs. Conventional Cellulose
submicron diameters and small interfiber spaces, which result
in more contaminant being captured on the surface of the media
and lower restriction.
Cellulose fibers are larger
than nanofibers, and have larger spaces between the fibers,
causing contaminant to be held in the depth of the media and
plug the airflow path; resulting in higher restriction and
circles represent the diameter of a 2 micron and a 5 micron