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Liquid Filter Design Features
Heavy-duty Design
OVERVIEW Beefed-Up Baffle Plate & Seam
Most heavy-duty liquid filters made by Donaldson have an identifiable baffle
plate. Most also have open ends that turn up for strength and durability. Anatomy of a Spin-on Filter
Most competitive products have baffle plates that turn down and in.
Gasket
Tapered lead-in thread edge Retainer
Rolled threads
Inverted Baffle Plate Design Baffle Plate
Full tuck seams
Inner Seal
Donaldson Baffle Plate Cross Section Baffle Plate Cross Section
Inner Cartridge
End cap
Urethane or plastisol
sealing
Resilient Inner Seal Center liner
Not all competitive filters have Filter media
a seal between the baffle plate Urethane or plastisol
and end cap. Donaldson’s seal is sealing
constructed of molded elastomer End cap
that is designed for extreme Donaldson Inner Seal
cold and heat. Some competitive
brands use paper, cork and plastic
spacer materials that do not last
for the service life of the filter and
may not be leak tight. Inner Compression
Spring
Competitive Cross Section with No Inner Seal
Metal Housing
Competitive Cross Section with Plastic Spacer
Heavy-Duty End Cap Seals
A leak will occur in a filter when the end plate and filter do not seal
completely. There is no chance of Donaldson filters leaking at this critical
point because Donaldson spin-on filter media is embedded deeper in the
sealing compound (plastisol or urethane) compared to competitive brands.
Another
no-leak
feature is
the tabs
on the top
end cap Upper End Cap
of the filter element. The tabs
prevent the inner cartridge from
moving off-center in the housing
– preventing leaks and unfiltered
fluid from bypassing the filter.
Donaldson Brand A
6 • Engine Liquid Filtration www.donaldson.com
