Donaldson · Duramax HMK · return line

P569203 filter element: specifications & equivalents

The P569203 is a Donaldson return-line hydraulic filter element, built with synteq synthetic media, rated at 6 µm absolute (β6(c) ≥ 1000 per ISO 16889). Verify against the current manufacturer data sheet before ordering.

Filtration rating 6 µm abs.

Beta rating β 6(c) ≥ 1000 per ISO 16889

Media Synteq Synthetic

Line type return

Partially verified. Fit and grade trace to an official interchange document; dimensional values are compiled from 0 aftermarket listing(s) and must be confirmed against the manufacturer housing drawing. Confidence score 0.85.

Element length (L) and thread are taken from the HMK housing component table. Canister OD is not printed on this catalog page and is pending extraction from the element dimension table; verify against the current Donaldson data sheet before ordering.

Specification table

Parameter	Value
Filter type	return line
Media	Synteq Synthetic
Filtration rating	6 µm
Rating basis	absolute
Beta ratio	β6(c) ≥ 1000 per ISO 16889
Length	151.7 mm
End caps	spin-on baseplate with attached gasket
Flow direction	outside-in
Rated flow	133 L/min
Integral bypass valve	none (housing/valve-dependent)
Seal material	Nitrile (NBR)
Operating temperature	-29 to 121 °C
Manufacturer part no.	P569203
Source catalog	Donaldson Company: Donaldson Hydraulic Filters eCatalog
Last verified	2026-09-27

Sources: Donaldson Company — Donaldson Hydraulic Filters eCatalog — accessed 2026-09-26.

Donaldson® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized Donaldson distributor.

Cross references & equivalents

No catalog-verified cross references yet. This model is in the manual verification queue — request a verified equivalent.

Interchange levels: full catalog-confirmed drop-in · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the P569203 model number is decoded

P569203Donaldson Duramax HNK04 spin-on filter part number.
Baseplate mounting thread (HNK04 housing family).
6 µmMedia grade: 6 µm, β6(c) ≥ 1000 per ISO 16889.
Nitrile (NBR)Seal material: Nitrile (NBR).

Typical equipment & applications

Case drains and lube oil systems
Cooling circuits and power transmissions
Return lines and side-loop systems

Selection pitfalls — read before you substitute

A return-line element is not a pressure-line element: return cartridges (BN4HC low-collapse) tolerate roughly 20 bar differential, while BH4HC pressure executions are rated to 210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
This element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
“10 µm nominal” and “12 µm at β1000” can describe the very same media — one is reported at β≥200, the other at β≥1000 per ISO 16889. Compare ratings at the same Beta test point, not just the printed micron number.
Nitrile (NBR) seals are standard for mineral hydraulic oil but fail early in some phosphate-ester fluids and at sustained high temperature; verify seal compound against the fluid data sheet (fluorocarbon/Viton executions may be required).
End-cap geometry and the number/position of O-rings block interchange even when OD and length match — visually compare end caps before fitting, especially with aftermarket cartridges.

Frequently asked questions

What micron rating does P569203 use?

This element is rated 6 µm absolute — β6(c) ≥ 1000 per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the P569203 filter element?

Cross references are being verified for this model — use the inquiry form and the engineering desk will confirm equivalents.

How do I read the P569203 part number?

See the designation decoder above: each segment of P569203 encodes size, line type, filtration grade and media/collapse execution.

Is a same-envelope aftermarket element always a drop-in replacement?

No. Matching OD and length only proves the cartridge fits the bowl. End-cap style, seal compound, micron/Beta rating, collapse pressure and bypass configuration must also match; the table above tags every equivalent as full, partial or verify for exactly this reason.

How often should a hydraulic return-line element be replaced?

Replace at the housing manufacturer’s recommended differential-pressure setting (commonly signalled by a clogging indicator), or on a time-based service interval when no indicator is fitted — never wait for bypass to open continuously, because unfiltered oil then reaches the valves.

Other models in the Duramax HMK series

All 40 →

P163324 23 µm P163419 23 µm P164375 7 µm P164378 11 µm P164381 11 µm P164384 33 µm P165332 7 µm P165335 50 µm P165338 50 µm P165354 33 µm

Reviewed & verified by the ElementRef engineering desk against Donaldson Company on 2026-09-27. Read our editorial & correction policy.