HYDAC · Betamicron 4 R · return line

1.01.08 R 03 BN4 filter element: specifications & equivalents

Q: What are the dimensions of the 1.01.08 R 03 BN4 filter element?

The published envelope is 86.4 mm OD × 208.3 mm length with a 49.6 mm inside diameter (3.402 × 8.201 in × 1.953 in ID). Confirm against the housing drawing before ordering.

Q: What micron rating does 1.01.08 R 03 BN4 use?

This element is rated 3 µm absolute — β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The 1.01.08 R 03 BN4 is a HYDAC return-line hydraulic filter element, built with bn/hc=betamicron® low capacity media, sized 86.4 × 208.3 mm OD × length (ID 49.6 mm), rated at 3 µm absolute (β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 86.4 × 208.3 mm

Inside diameter 49.6 mm

Filtration rating 3 µm abs.

Beta rating β 3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)

Media BN/HC=Betamicron® Low Capacity

Collapse / burst 20 bar

Line type return

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

HYDAC Betterfit element — dimensions and ratings are taken from catalog.hydac.com. This is HYDAC's drop-in replacement for a Pall element; the exact competitor part number is not published on the catalog page. Verify form/fit and micron grade against the competitor data sheet before substituting.

Specification table

Parameter	Value
Filter type	return line
Media	BN/HC=Betamicron® Low Capacity
Filtration rating	3 µm
Rating basis	absolute
Beta ratio	β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)
Outside diameter OD	86.4 mm
Inside diameter ID	49.6 mm
Length	208.3 mm
End caps	open-ended cartridge element
Flow direction	inside-out
Collapse / burst pressure	20 bar
Integral bypass valve	opens at 3 bar
Seal material	Nitrile (Buna-N)
Operating temperature	-30 to 100 °C
Source catalog	HYDAC Technology Corporation: HYDAC electronic product catalog (catalog.hydac.com)
Last verified	2026-09-28

Sources: HYDAC Technology Corporation — HYDAC electronic product catalog (catalog.hydac.com) — accessed 2026-09-29.

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

Dimensions & series range

Outside diameter	86.4 mm (3.402 in)
Inside diameter	49.6 mm (1.953 in)
Overall length	208.3 mm (8.201 in)

All 86×208 mm interchange elements →

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 1.01.08 R 03 BN4 model number is decoded

1.01.08 R 03 BN4HYDAC Betterfit filter element ordering code per catalog.hydac.com. Replaces Pall elements.
BN/HC=Betamicron® Low CapacityFilter media and collapse family as printed in the catalog.
3 µmAbsolute filter rating per the HYDAC catalog.
86.4 mmOutside diameter.
208.3 mmElement length.
20 barElement collapse (differential pressure) rating.
Nitrile (Buna-N)Seal compound.

Typical equipment & applications

HYDAC Betterfit drop-in replacement for Pall hydraulic filter elements
Return-line filtration for equivalent housings

Selection pitfalls — read before you substitute

A return-line element is not a pressure-line element: return cartridges (BN4HC low-collapse) tolerate roughly 20 bar differential, while BH4HC pressure executions are rated to 210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
This execution carries an integral bypass valve (opens at 3 bar). The same envelope also exists without it, relying on the housing valve. Mixing the two strategies changes cold-start protection — match what was installed originally.
“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 1.01.08 R 03 BN4 filter element?

The published envelope is 86.4 mm OD × 208.3 mm length with a 49.6 mm inside diameter (3.402 × 8.201 in × 1.953 in ID). Confirm against the housing drawing before ordering.

What micron rating does 1.01.08 R 03 BN4 use?

This element is rated 3 µm absolute — β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the 1.01.08 R 03 BN4 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 1.01.08 R 03 BN4 part number?

See the designation decoder above: each segment of 10108R03BN4 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 12 catalog element(s) share the 86×208 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

1.01.08 R 06 BN4 HYDAC · 6 µm 1.01.08 R 12 BN4 HYDAC · 12 µm 1.01.08 R 25 BN4 HYDAC · 25 µm HD939 MANN-FILTER HD939/1 MANN-FILTER HD939/2 MANN-FILTER HD939/3 MANN-FILTER RP-075-E-03-B STAUFF RP-075-E-03-V STAUFF RP-075-E-05-B STAUFF

Other models in the Betamicron 4 R series

All 929 →

0030 R 003 BN4HC 36×107 mm · 3 µm 0030 R 005 BN4HC 36×107 mm · 5 µm 0030 R 010 BN4HC 36×107 mm · 10 µm 0030 R 010 BN4HC /-B6 36×107 mm · 10 µm 0030 R 010 P/HC 36×107 mm · 10 µm 0030 R 010 P/HC /-B6 36×107 mm · 10 µm 0030 R 020 BN4HC 36×107 mm · 20 µm 0030 R 020 P/HC 36×107 mm · 20 µm 0030 R 025 W/HC 36×107 mm · 25 µm 0030 R 050 W/HC 36×107 mm · 50 µm

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