HYDAC · Betamicron 4 R · return line

5.38.05 R 20 P filter element: specifications & equivalents

Q: What are the dimensions of the 5.38.05 R 20 P filter element?

The published envelope is 61 mm OD × 134.6 mm length with a 26.59 mm inside diameter (2.402 × 5.299 in × 1.047 in ID). Confirm against the housing drawing before ordering.

Q: What micron rating does 5.38.05 R 20 P use?

This element is rated 20 µm absolute — β30 > 1000 (HYDAC grade convention: β22(c) ≥ 1000). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The 5.38.05 R 20 P is a HYDAC return-line hydraulic filter element, built with p=polyester fleece / cellulose media, sized 61 × 134.6 mm OD × length (ID 26.59 mm), rated at 20 µm absolute (β30 > 1000 (HYDAC grade convention: β22(c) ≥ 1000)). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 61 × 134.6 mm

Inside diameter 26.59 mm

Filtration rating 20 µm abs.

Beta rating β 30 > 1000 (HYDAC grade convention: β22(c) ≥ 1000)

Media P=Polyester Fleece / Cellulose

Line type return

Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-10-16. Confidence score 0.90.

HYDAC Betterfit element — dimensions and ratings are taken from catalog.hydac.com. HYDAC lists this as a drop-in replacement for Schroeder elements; 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	P=Polyester Fleece / Cellulose
Filtration rating	20 µm
Rating basis	absolute
Beta ratio	β30 > 1000 (HYDAC grade convention: β22(c) ≥ 1000)
Outside diameter OD	61 mm
Inside diameter ID	26.59 mm
Length	134.6 mm
End caps	open-ended cartridge element
Flow direction	inside-out
Integral bypass valve	none (housing/valve-dependent)
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	2026-10-16

Sources: HYDAC Technology Corporation — HYDAC electronic product catalog (catalog.hydac.com) — accessed 2026-10-16.

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.

Dimensional drawing

Reference drawing generated from the source values cited on this page — nominal envelope, schematic section, not a manufacturer drawing. The PDF is A3 landscape and vector; the PNG is sized for a WhatsApp preview. Confirm thread, end caps, seal compound and micron/Beta grade against the original element before ordering.

Dimensions & series range

Outside diameter	61 mm (2.402 in)
Inside diameter	26.59 mm (1.047 in)
Overall length	134.6 mm (5.299 in)

All 61×135 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.

Full chart: HYDAC cross reference chart →

How the 5.38.05 R 20 P model number is decoded

5.38.05 R 20 PHYDAC Betterfit filter element ordering code per catalog.hydac.com. Replaces Schroeder elements.
P=Polyester Fleece / CelluloseFilter media and collapse family as printed in the catalog.
20 µmAbsolute filter rating per the HYDAC catalog.
61 mmOutside diameter.
134.6 mmElement length.
Nitrile (Buna-N)Seal compound.

Typical equipment & applications

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

Selection pitfalls — read before you substitute

Line type is not interchangeable: return-line cartridges are low-collapse executions that typically tolerate roughly 10–20 bar differential, while pressure-line elements are commonly rated 100–210 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.
This execution uses nitrile (buna-n) seals — verify the compound against the fluid data sheet: standard nitrile (NBR) can fail early in phosphate-ester fluids and at sustained high temperature, where 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 5.38.05 R 20 P filter element?

The published envelope is 61 mm OD × 134.6 mm length with a 26.59 mm inside diameter (2.402 × 5.299 in × 1.047 in ID). Confirm against the housing drawing before ordering.

What micron rating does 5.38.05 R 20 P use?

This element is rated 20 µm absolute — β30 > 1000 (HYDAC grade convention: β22(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 5.38.05 R 20 P 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 5.38.05 R 20 P part number?

See the designation decoder above: each segment of 53805R20P 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 filter 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 5 catalog element(s) share the 61×135 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

4.05.05 D 03 BN4 /-V HYDAC · 3 µm 4.05.05 D 05 BN4 /-V HYDAC · 5 µm 4.05.05 D 10 BN4 HYDAC · 10 µm 4.05.05 D 10 BN4 /-V HYDAC · 10 µm 4.05.05 D 20 BN4 /-V HYDAC · 20 µm

Other models in the Betamicron 4 R series

All 948 (list page 2/2) →

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 2026-10-16. Read our editorial & correction policy.