Donaldson · FPK 03/04 · pressure line

P171733 filter element: specifications & equivalents

Q: What micron rating does P171733 use?

This element is rated 23 µm absolute — β23(c) ≥ 1000 per ISO 16889 (Donaldson “B23” cartridge grade). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The P171733 is a Donaldson pressure-line hydraulic filter element, built with synteq synthetic media, standard-collapse execution media, rated at 23 µm absolute (β23(c) ≥ 1000 per ISO 16889 (Donaldson “B23” cartridge grade)). Verify against the current manufacturer data sheet before ordering.

Filtration rating 23 µm abs.

Beta rating β 23(c) ≥ 1000 per ISO 16889 (Donaldson “B23” cartridge grade)

Media Synteq synthetic media, standard-collapse execution

Line type pressure

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 0.82.

Element length is taken from the FPK housing dimension table (column L); element OD/ID are not printed on this catalog page and are pending extraction from the dedicated element dimension table. Verify against the current Donaldson data sheet before ordering.

Specification table

Parameter	Value
Filter type	pressure line
Media	Synteq synthetic media, standard-collapse execution
Filtration rating	23 µm
Rating basis	absolute
Beta ratio	β23(c) ≥ 1000 per ISO 16889 (Donaldson “B23” cartridge grade)
Length	215 mm
Integral bypass valve	none (housing/valve-dependent)
Manufacturer part no.	P171733
Source catalog	Donaldson Company: Donaldson Hydraulic Filters eCatalog
Last verified	2026-09-28

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

Equivalent model	Brand	Match level	Note
↔ D132G25A	Filtrec	partial	Filtrec's official Cross Navigator maps DONALDSON P171733 to FILTREC D132G25A as a direct replacement, publishing the FILTREC element's OD/ID/height envelope and media grade. Rated micron differs (23 vs 22 µm) — verify efficiency class and collapse/seal for the housing before substituting.
↔ HD6001	MANN-FILTER	partial	MANN-FILTER's online catalog lists P171733 (DONALDSON) as a comparison number for HD6001. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF28915	Fleetguard	partial	Fleetguard's online catalog lists P171733 as an interchange for HF28915. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ PT9478-MPG	Baldwin Filters	partial	Baldwin's Form 561 Number-Finder cross-reference lists P171733 (DONALDSON) as replaced by Baldwin PT9478-MPG. Form/fit listing without published performance data — verify micron grade, collapse rating and seal configuration before substituting.

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.

Full chart: Donaldson cross reference chart →

How the P171733 model number is decoded

P171733Donaldson FPK cartridge element part number for the AP361 housing family (element family AP451).
B23Media grade: 23 µm at βx(c) ≥ 1000 per ISO 16889.
standard-collapseStandard-collapse execution (P1717xx range).

Typical equipment & applications

Pressure-line hydraulic filters upstream of control valves
High-differential-pressure industrial hydraulic circuits
Hydraulic power units for steel, paper and power generation

Selection pitfalls — read before you substitute

Line type is not interchangeable: return-line cartridges are low-collapse executions that typically tolerate roughly 10–20 bar differential, while pressure-line elements are commonly rated 100–210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
“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.

Frequently asked questions

What micron rating does P171733 use?

This element is rated 23 µm absolute — β23(c) ≥ 1000 per ISO 16889 (Donaldson “B23” cartridge grade). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the P171733 filter element?

4 partial match(es) requiring parameter review

How do I read the P171733 part number?

See the designation decoder above: each segment of P171733 encodes size, line type, filtration grade and media/collapse execution.

How often should a hydraulic filter 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 FPK 03/04 series

All 36 →

P171731 8 µm P171732 11 µm P171734 8 µm P171735 11 µm P171736 23 µm P171737 8 µm P171738 11 µm P171739 23 µm P171740 8 µm P171741 11 µm

Reviewed & verified by the ElementRef engineering desk against Donaldson Company on 2026-09-28. Read our editorial & correction policy.