Schroeder Industries · BestFit Elements · inline line

KKZ25 filter element: specifications & equivalents

Q: What are the dimensions of the KKZ25 filter element?

The published envelope is 99 mm OD × 464 mm length with a 41 mm inside diameter (3.898 × 18.268 in × 1.614 in ID). Confirm against the housing drawing before ordering.

Q: What micron rating does KKZ25 use?

This element is rated 25 µm (nominal class) — 24 µm at β(c) ≥ 1000 (99.9% efficiency). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The KKZ25 is a Schroeder Industries inline-line hydraulic filter element, built with excellement® z-media® (synthetic) media, sized 99 × 464 mm OD × length (ID 41 mm), rated at 25 µm class (24 µm at β(c) ≥ 1000 (99.9% efficiency)). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 99 × 464 mm

Inside diameter 41 mm

Filtration rating 25 µm nom.

Beta rating 24 µm at β(c) ≥ 1000 (99.9% efficiency)

Media Excellement® Z-Media® (Synthetic)

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	Excellement® Z-Media® (Synthetic)
Filtration rating	25 µm
Rating basis	nominal
Beta ratio	24 µm at β(c) ≥ 1000 (99.9% efficiency)
Outside diameter OD	99 mm
Inside diameter ID	41 mm
Length	464 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	1500 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	464 mm (18.268 in)

All 99×464 mm interchange elements →

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ 1HF42H20SLA000P page in verification queue	Aftermarket	partial	Schroeder online cross-reference (EPE); envelope match — verify grade and seals.
↔ 2060433 page in verification queue	UFI	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ 2970L25B18 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (SEPARATION TECHNOLOGIES); envelope match — verify grade and seals.
↔ 3970GGMB18 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (SEPARATION TECHNOLOGIES); envelope match — verify grade and seals.
↔ 50318D20BN page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYCON); envelope match — verify grade and seals.
↔ 50318D25P page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ 931020Q	Parker	partial	Schroeder online cross-reference (PARKER); envelope match — verify grade and seals.
↔ 934292 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PARKER); envelope match — verify grade and seals.
↔ 934292Q page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PARKER); envelope match — verify grade and seals.
↔ 9700EAL202N2 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PUROLATOR); envelope match — verify grade and seals.
↔ 9700EAL252N2 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (PUROLATOR); envelope match — verify grade and seals.
↔ BEK1825A page in verification queue	Aftermarket	partial	Schroeder online cross-reference (BEHRINGER); envelope match — verify grade and seals.
↔ C925794 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (COMMERCIAL); envelope match — verify grade and seals.
↔ DE4051B5C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (DENISON); envelope match — verify grade and seals.
↔ E4051B5C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (WESTERN); envelope match — verify grade and seals.
↔ E4051B6C20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (WESTERN); envelope match — verify grade and seals.
↔ E4051B6E20 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (WESTERN); envelope match — verify grade and seals.
↔ FD651G25A page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FRAM); envelope match — verify grade and seals.
↔ H2K020BN page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ H2K020BN3 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (HYDAC); envelope match — verify grade and seals.
↔ H9718MFBL page in verification queue	Aftermarket	partial	Schroeder online cross-reference (POROUS MEDIA/FILTERSOFT); envelope match — verify grade and seals.
↔ HC9700FCT18H	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9700FDT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9700FKT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9700FUT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9700FXT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9720FKT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HC9735FKT18H page in verification queue	Pall	partial	Schroeder online cross-reference (PALL); envelope match — verify grade and seals.
↔ HF30805	Fleetguard	partial	Fleetguard's online catalog lists KKZ25 as an interchange for HF30805. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting.
↔ HF4100JFB page in verification queue	Fleetguard	partial	Schroeder online cross-reference (PTI); envelope match — verify grade and seals.
↔ HF42L20NQ page in verification queue	Fleetguard	partial	Schroeder online cross-reference (PARKER); envelope match — verify grade and seals.
↔ HF7339	Fleetguard	partial	Schroeder online cross-reference (FLEETGUARD); envelope match — verify grade and seals.
↔ MF0342977 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals.
↔ MP3014 page in verification queue	MP Filtri	partial	Schroeder online cross-reference (MP FILTRI); envelope match — verify grade and seals.
↔ P174260 page in verification queue	Donaldson	partial	Schroeder online cross-reference (DONALDSON); envelope match — verify grade and seals.
↔ P97100JFB page in verification queue	Donaldson	partial	Schroeder online cross-reference (PTI); envelope match — verify grade and seals.
↔ PLU3881000 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals.
↔ RF4H0925A page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FAIREY ARLON); envelope match — verify grade and seals.
↔ RKH1825A page in verification queue	Aftermarket	partial	Schroeder online cross-reference (FAIREY ARLON); envelope match — verify grade and seals.
↔ SRE41825 page in verification queue	Aftermarket	partial	Schroeder online cross-reference (ZINGA); envelope match — verify grade and seals.
↔ TTK1825B page in verification queue	Aftermarket	partial	Schroeder online cross-reference (TODD TECHNOLOGIES INC); envelope match — verify grade and seals.
↔ V4051B6C20	Eaton / Internormen	partial	Schroeder online cross-reference (VICKERS); envelope match — verify grade and seals.
↔ V4051B6V20 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 KKZ25 model number is decoded

KKZ25Schroeder BestFit filter element part number of the KK housing-size family.
Excellement® Z-Media® (Synthetic)Filter media execution.
25 µmNominal filter rating as printed in the Schroeder catalog.
β≥1000Absolute rating: 24 µm particle size at β(c) ≥ 1000, 99.9% efficiency.
99 mmOuter diameter.
41 mmInner diameter.
464 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 KKZ25 filter element?

The published envelope is 99 mm OD × 464 mm length with a 41 mm inside diameter (3.898 × 18.268 in × 1.614 in ID). Confirm against the housing drawing before ordering.

What micron rating does KKZ25 use?

This element is rated 25 µm (nominal class) — 24 µm at β(c) ≥ 1000 (99.9% 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 KKZ25 filter element?

43 partial match(es) requiring parameter review

How do I read the KKZ25 part number?

See the designation decoder above: each segment of KKZ25 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 63 catalog element(s) share the 99×464 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

KK10 Schroeder Industries · 10 µm KK10C Schroeder Industries · 10 µm KK10V Schroeder Industries · 10 µm KK25 Schroeder Industries · 25 µm KK25V Schroeder Industries · 25 µm KK3 Schroeder Industries · 3 µm KK3V Schroeder Industries · 3 µm KKAS10 Schroeder Industries · 10 µm KKAS3 Schroeder Industries · 3 µm KKAS3V Schroeder Industries · 3 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.