ElementBase

Donaldson · Hydraulic Catalog · inline line

P550274 filter element: specifications & equivalents

The P550274 is a Donaldson inline-line hydraulic filter element, built with wire mesh media, rated at 150 µm class. Verify against the current manufacturer data sheet before ordering.

Filtration rating 150 µm nom.
Media Wire Mesh
Line type inline
Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-27. Confidence score 0.90.

OD/ID dimensions, collapse pressure and bypass settings are not printed in the filter-element choice table and are pending extraction from the housing dimension pages. Verify against the current Donaldson data sheet before ordering.

Specification table

ParameterValue
Filter type inline line
Media Wire Mesh
Filtration rating 150 µm
Rating basis nominal
Length 136 mm
Integral bypass valve none (housing/valve-dependent)
Manufacturer part no. P550274
Source catalog Donaldson Company: Hydraulic Filtration Product Guide (F112100-ENG)
Last verified2026-09-27

Sources: Donaldson Company — Hydraulic Filtration Product Guide (F112100-ENG) — accessed 2026-09-27.

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 P550274 model number is decoded

  • P550274Donaldson hydraulic filter element part number per the Hydraulic Filtration Product Guide (F112100-ENG).
  • SP15/25Product family: SP15/25.
  • Wire MeshFilter media: Wire Mesh.
  • 150 μmNominal filtration rating at βx(c) = 2 per ISO 16889.

Typical equipment & applications

  • Donaldson SP15/25 hydraulic filter housing

Selection pitfalls — read before you substitute

  • “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 P550274 use?
This element is rated 150 µm (nominal class). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the P550274 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 P550274 part number?
See the designation decoder above: each segment of P550274 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 Hydraulic Catalog series

All 240 →
P160700 150 µm P161016 4 µm P161571 22 µm P162233 75 µm P163542 11 µm P163567 23 µm P163945 150 µm P164056 13 µm P164059 22 µm P164405 4 µm

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