HYDAC · Betamicron 4 R · return line

0660 R 005 BN4HC filter element: specifications & equivalents

The 0660 R 005 BN4HC is a HYDAC return-line hydraulic filter element, built with betamicron 4 microglass (bn4hc) media, rated at 5 µm class (β7(c) ≥ 1000 per ISO 16889 (5 µm at β ≥ 200)). Verify against the current manufacturer data sheet before ordering.

Filtration rating 5 µm nom.

Beta rating β 7(c) ≥ 1000 per ISO 16889 (5 µm at β ≥ 200)

Media Betamicron 4 microglass (BN4HC)

Collapse / burst 20 bar

Line type return

Partially verified. Fit and grade trace to an official interchange document; dimensional values are compiled from 0 aftermarket listing(s) and must be confirmed against the manufacturer housing drawing. Confidence score 0.75.

Envelope dimensions (OD/ID/length) are pending extraction from the HYDAC Betamicron catalog (s3); grade, media and collapse ratings are confirmed. Verify the housing drawing before ordering.

Specification table

Parameter	Value
Filter type	return line
Media	Betamicron 4 microglass (BN4HC)
Filtration rating	5 µm
Rating basis	nominal
Beta ratio	β7(c) ≥ 1000 per ISO 16889 (5 µm at β ≥ 200)
Nominal length code	12 in
Flow direction	outside-in
Collapse / burst pressure	20 bar
Integral bypass valve	none (housing/valve-dependent)
Seal material	Nitrile (NBR)
Operating temperature	-30 to 100 °C
Source catalog	Pall Corporation: Red1000 Series Filter Element Interchange List (M&EREDCOMPEN (Pall literature library)) HYDAC / Airline Hydraulics: Betamicron Filter Elements
Last verified	2026-09-27

Sources: Pall Corporation — Red1000 Series Filter Element Interchange List · HYDAC / Airline Hydraulics — Betamicron Filter Elements — accessed 2026-09-26.

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

Nominal length code

12 inches

Cross references & equivalents

Equivalent model	Brand	Match level	Note
↔ HC2285FCN12H	Pall	full	Direct fit per Pall’s Red1000 interchange list (no adaptor). Grades print differently — HYDAC 005 code vs Pall 7 µm β>1000 — the two conventions describe the same multipass-tested grade; verify cleanliness targets for critical drives. For housings using the reusable bypass valve.

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 0660 R 005 BN4HC model number is decoded

0660Element size code for the HYDAC RF/RFM return-filter housing family (0660 size).
RReturn-line element (installed in a tank-top return filter).
005Filtration grade code: 5 µm class (7 µm(c) at β ≥ 1000 per the ISO 16889 multipass convention used in Pall’s interchange list).
BN4HCBetamicron 4 microglass media, low-collapse execution (~20 bar collapse pressure) with nitrile seals; BH4HC is the 210 bar high-collapse variant.

Typical equipment & applications

Tank-mounted return-line hydraulic filters
Hydraulic power units and lubrication systems
Construction and agricultural machinery
Machine tool and industrial hydraulic systems

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 element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
“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 5 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 micron rating does 0660 R 005 BN4HC use?

This element is rated 5 µm (nominal class) — β7(c) ≥ 1000 per ISO 16889 (5 µm at β ≥ 200). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the 0660 R 005 BN4HC filter element?

1 catalog-confirmed full match(es) (HC2285FCN12H)

How do I read the 0660 R 005 BN4HC part number?

See the designation decoder above: each segment of 0660R005BN4HC 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.