Schroeder Industries · BestFit Elements · inline line
KK3 filter element: specifications & equivalents
The KK3 is a Schroeder Industries inline-line hydraulic filter element, built with e media (cellulose) media, sized 99 × 464 mm OD × length (ID 41 mm), rated at 3 µm class (10 µm at β(c) ≥ 200 (99.5% efficiency)). Verify against the current manufacturer data sheet before ordering.
Envelope OD × L 99 × 464 mm
Inside diameter 41 mm
Filtration rating 3 µm nom.
Beta rating 10 µm at 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 | 3 µm |
| Rating basis | nominal |
| Beta ratio | 10 µm at β(c) ≥ 200 (99.5% 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 | 1360 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 |
|---|---|---|---|
|
↔ 30397 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (CIM-TEK); envelope match — verify grade and seals. |
|
↔ 9700EAL051N2 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (PUROLATOR); envelope match — verify grade and seals. |
|
↔ BEK1803N page in verification queue | Aftermarket | partial | Schroeder online cross-reference (BEHRINGER); envelope match — verify grade and seals. |
|
↔ HF4100BCB page in verification queue | Fleetguard | partial | Schroeder online cross-reference (PTI); envelope match — verify grade and seals. |
| ↔ HF6215 | Fleetguard | partial | Fleetguard's online catalog lists KK3 as an interchange for HF6215. Envelope cross-reference; verify micron grade, collapse rating and seal configuration before substituting. |
|
↔ HPKL183MB page in verification queue | Aftermarket | partial | Schroeder online cross-reference (HY-PRO); envelope match — verify grade and seals. |
|
↔ MF0059499 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals. |
|
↔ MF0342904 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals. |
|
↔ MF0796480 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (MAIN FILTER INC); envelope match — verify grade and seals. |
|
↔ MP69567 page in verification queue | MP Filtri | partial | Schroeder online cross-reference (MP FILTRI); envelope match — verify grade and seals. |
|
↔ RF4H0903A page in verification queue | Aftermarket | partial | Schroeder online cross-reference (FAIREY ARLON); envelope match — verify grade and seals. |
|
↔ RKH1806A page in verification queue | Aftermarket | partial | Schroeder online cross-reference (FAIREY ARLON); envelope match — verify grade and seals. |
|
↔ SCU2571 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (NORMAN); envelope match — verify grade and seals. |
|
↔ SRE4183 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (ZINGA); envelope match — verify grade and seals. |
|
↔ ST6215 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (SEPARATION TECHNOLOGIES); envelope match — verify grade and seals. |
|
↔ V4051B6C05 page in verification queue | Aftermarket | partial | Schroeder online cross-reference (VICKERS); envelope match — verify grade and seals. |
|
↔ V4051B6V05 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 KK3 model number is decoded
- KK3Schroeder BestFit filter element part number of the KK housing-size family.
- E Media (Cellulose)Filter media execution.
- 3 µmNominal filter rating as printed in the Schroeder catalog.
- β≥200Absolute rating: 10 µm particle size at β(c) ≥ 200, 99.5% 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).
- Fine 3 µm media loads faster and runs at a higher cold Δp than coarser grades — only downgrade cleanliness targets if the system ISO 4406 code allows it.
- 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 KK3 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 KK3 use?
This element is rated 3 µm (nominal class) — 10 µm at 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 KK3 filter element?
17 partial match(es) requiring parameter review
How do I read the KK3 part number?
See the designation decoder above: each segment of KK3 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.
Other models in the BestFit Elements series
All 1082 →Reviewed & verified by the ElementRef engineering desk against Schroeder Industries on 2026-09-28. Read our editorial & correction policy.