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MP Filtri · HP / CU / HPX Elements · pressure line

HF3251M25ANP01 filter element: specifications & equivalents

The HF3251M25ANP01 is a MP Filtri pressure-line hydraulic filter element, built with wire mesh media, rated at 25 µm class. Verify against the current manufacturer data sheet before ordering.

Filtration rating 25 µm nom.
Media Wire mesh
Collapse / burst 20 bar
Line type pressure
Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.

Part number structure and orderable options are taken from the MP Filtri Hydraulic Filtration Catalogue (CAT_HF_HP_EN p.124). This is the standard execution; FPM seals (V) and high-collapse variants (S/H) are orderable under different suffixes. Element dimensions are not available for this series — verify against the current MP Filtri data sheet before ordering.

Specification table

ParameterValue
Filter type pressure line
Media Wire mesh
Filtration rating 25 µm
Rating basis nominal
End caps open-ended cartridge element
Collapse / burst pressure 20 bar
Integral bypass valve none (housing/valve-dependent)
Seal material Nitrile (Buna-N)
Source catalog MP Filtri: MP Filtri Hydraulic Filtration Catalogue
Last verified2026-09-28

Sources: MP Filtri — MP Filtri Hydraulic Filtration Catalogue — accessed 2026-09-29.

MP Filtri® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized MP Filtri 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 HF3251M25ANP01 model number is decoded

  • HF325MP Filtri element series and size code for the matched high/medium-pressure housing family.
  • 1Element length code within the series.
  • M25Filter media: Wire mesh, 25 µm (nominal rating).
  • ASeals: NBR (nitrile).
  • NElement differential-pressure (collapse) rating: 20 bar standard execution.
  • P01MP Filtri standard catalogue item execution.

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

  • “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 HF3251M25ANP01 use?
This element is rated 25 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 HF3251M25ANP01 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 HF3251M25ANP01 part number?
See the designation decoder above: each segment of HF3251M25ANP01 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 HP / CU / HPX Elements series

All 435 →
CU1101A03ANP01 3 µm CU1101A06ANP01 6 µm CU1101A10ANP01 10 µm CU1101A16ANP01 16 µm CU1101A25ANP01 25 µm CU1101M25ANP01 25 µm CU1101M60ANP01 60 µm CU1101M90ANP01 90 µm CU1101P10ANP01 10 µm CU1101P25ANP01 25 µm

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