Schroeder Industries · BestFit Elements · inline line

K25 filter element: specifications & equivalents

Q: What are the dimensions of the K25 filter element?

The published envelope is 99 mm OD × 231 mm length with a 41 mm inside diameter (3.898 × 9.094 in × 1.614 in ID). Confirm against the housing drawing before ordering.

Q: What micron rating does K25 use?

This element is rated 25 µm (nominal class) — β(c) ≥ 200 (99.5% efficiency). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The K25 is a Schroeder Industries inline-line hydraulic filter element, built with e media (cellulose) media, sized 99 × 231 mm OD × length (ID 41 mm), rated at 25 µm class (β(c) ≥ 200 (99.5% efficiency)). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 99 × 231 mm

Inside diameter 41 mm

Filtration rating 25 µm nom.

Beta rating β (c) ≥ 200 (99.5% efficiency)

Media E Media (Cellulose)

Collapse / burst 10.3 bar

Line type inline

Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.

Dimensions, ratings and seal compound are taken from the Schroeder Industries online catalog. The nominal µm rating and the β200 absolute rating use different conventions — match the existing media grade before substituting; verify against the current Schroeder data sheet before ordering.

Specification table

Parameter	Value
Filter type	inline line
Media	E Media (Cellulose)
Filtration rating	25 µm
Rating basis	nominal
Beta ratio	β(c) ≥ 200 (99.5% efficiency)
Outside diameter OD	99 mm
Inside diameter ID	41 mm
Length	231 mm
End caps	open-ended cartridge element
Collapse / burst pressure	10.3 bar
Integral bypass valve	none (housing/valve-dependent)
Seal material	Nitrile (Buna-N)
Operating temperature	-29 to 107 °C
Mass	640 g
Source catalog	Schroeder Industries: Schroeder Industries online catalog (catalog.schroederindustries.com)
Last verified	2026-09-28

Sources: Schroeder Industries — Schroeder Industries online catalog (catalog.schroederindustries.com) — accessed 2026-09-28.

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

Dimensions & series range

Outside diameter	99 mm (3.898 in)
Inside diameter	41 mm (1.614 in)
Overall length	231 mm (9.094 in)

All 99×231 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ 1434 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (NAPA); envelope match — verify grade and seals.
↔ 2058778 page in verification queue	UFI	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ 30130 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (CIM-TEK); envelope match — verify grade and seals.
↔ 4073AP page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FILTER STORE); envelope match — verify grade and seals.
↔ 5.03.09 D 25 P	HYDAC	partial	Schroeder online cross-reference (HYCON); envelope match — verify grade and seals.
↔ 51434	WIX Filters	partial	Schroeder online cross-reference (WIX); envelope match — verify grade and seals.
↔ 658305 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FLOW-EZY); envelope match — verify grade and seals.
↔ 70190020 page in verification queue	UFI	partial	Schroeder online cross-reference (FIAT-ALLIS); envelope match — verify grade and seals.
↔ 70197878 page in verification queue	UFI	partial	Schroeder online cross-reference (FIAT-ALLIS); envelope match — verify grade and seals.
↔ 756505 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FLOW-EZY); envelope match — verify grade and seals.
↔ 818ACC25CB page in verification queue	Aftermarket	partial	Schroeder online cross-reference (SEPARATION TECHNOLOGIES); envelope match — verify grade and seals.
↔ 925773	Parker	partial	Parker ParFit interchange — Schroeder K25 replaced by Parker 925773. Envelope match; verify grade and seals.
↔ 926899 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PARKER); envelope match — verify grade and seals.
↔ 9700EAL201N1 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PUROLATOR); envelope match — verify grade and seals.
↔ BEK925N page in verification queue	Aftermarket	partial	Schroeder online cross-reference (BEHRINGER); envelope match — verify grade and seals.
↔ BP410 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (DIAGNETICS); envelope match — verify grade and seals.
↔ C1682 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FRAM); envelope match — verify grade and seals.
↔ DE4051B3C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (DENISON); envelope match — verify grade and seals.
↔ DLU896 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals.
↔ DP410 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (DIAGNETICS); envelope match — verify grade and seals.
↔ E0250BT25 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (WESTERN); envelope match — verify grade and seals.
↔ E4051B3C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (WESTERN); envelope match — verify grade and seals.
↔ F2525NM page in verification queue	Aftermarket	partial	Schroeder online cross-reference (CAN-FLO); envelope match — verify grade and seals.
↔ HC4070DCB page in verification queue	Pall	partial	Schroeder online cross-reference (PTI); envelope match — verify grade and seals.
↔ HF4050DCB page in verification queue	Fleetguard	partial	Schroeder online cross-reference (PTI); envelope match — verify grade and seals.
↔ HF6111	Fleetguard	partial	Fleetguard's online catalog lists K25 as an interchange for HF6111. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HK020P page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ HK025P page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYCON); envelope match — verify grade and seals.
↔ HPKL925M page in verification queue	Aftermarket	partial	Schroeder online cross-reference (MP FILTRI); envelope match — verify grade and seals.
↔ HPKL925MB page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HY-PRO); envelope match — verify grade and seals.
↔ L814 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (KRALINATOR); envelope match — verify grade and seals.
↔ MF0059457 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals.
↔ MF0342862 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals.
↔ MFS180925 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (MP FILTRI); envelope match — verify grade and seals.
↔ P167425 page in verification queue	Donaldson	partial	Schroeder online cross-reference (DONALDSON); envelope match — verify grade and seals.
↔ PF328 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (AC); envelope match — verify grade and seals.
↔ PM6014 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PUROLATOR); envelope match — verify grade and seals.
↔ PRU896 page in verification queue	Parker	partial	Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals.
↔ PT707-HD	Baldwin Filters	partial	Schroeder online cross-reference (BALDWIN); envelope match — verify grade and seals.
↔ PT707HD25 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (BALDWIN); envelope match — verify grade and seals.
↔ PTU896 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals.
↔ R2329 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (RYCO); envelope match — verify grade and seals.
↔ R2329P page in verification queue	Aftermarket	partial	Schroeder online cross-reference (RYCO); envelope match — verify grade and seals.
↔ SCU896 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals.
↔ SRE40925 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (ZINGA); envelope match — verify grade and seals.
↔ V4051B3C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (VICKERS); envelope match — verify grade and seals.
↔ V4051B3V20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (VICKERS); envelope match — verify grade and seals.

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 K25 model number is decoded

K25Schroeder BestFit filter element part number of the K housing-size family.
E Media (Cellulose)Filter media execution.
25 µmNominal filter rating as printed in the Schroeder catalog.
β≥200Absolute rating: β(c) ≥ 200, 99.5% efficiency.
99 mmOuter diameter.
41 mmInner diameter.
231 mmElement height.
10.3 barElement collapse pressure rating.
Nitrile (Buna-N)Seal compound.

Typical equipment & applications

Replacement element for Schroeder hydraulic and lube filter housings
Industrial and mobile hydraulic filtration

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 are the dimensions of the K25 filter element?

The published envelope is 99 mm OD × 231 mm length with a 41 mm inside diameter (3.898 × 9.094 in × 1.614 in ID). Confirm against the housing drawing before ordering.

What micron rating does K25 use?

This element is rated 25 µm (nominal class) — β(c) ≥ 200 (99.5% efficiency). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the K25 filter element?

47 partial match(es) requiring parameter review

How do I read the K25 part number?

See the designation decoder above: each segment of K25 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.

Same-envelope elements from other brands

View full interchange →

These 86 catalog element(s) share the 99×231 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

BRE-10 Schroeder Industries · 10 µm BRE-25 Schroeder Industries · 25 µm BRE-3 Schroeder Industries · 3 µm BRE-Z10 Schroeder Industries · 10 µm BRE-Z5 Schroeder Industries · 5 µm K10 Schroeder Industries · 10 µm K10C Schroeder Industries · 10 µm K10H Schroeder Industries · 10 µm K25C Schroeder Industries · 25 µm K25H Schroeder Industries · 25 µm

Other models in the BestFit Elements series

All 1082 →

10DVZ1 74×249 mm · 1 µm 10DVZ10 74×249 mm · 10 µm 10DVZ10V 74×249 mm · 10 µm 10DVZ25 74×249 mm · 25 µm 10DVZ3 74×249 mm · 3 µm 10DVZ5 74×249 mm · 5 µm 13HAS10 91×328 mm · 10 µm 13HASX10 91×328 mm · 10 µm 13HZ10 91×328 mm · 10 µm 13HZ10V 91×328 mm · 10 µm

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