Used Vacuum Pumps›Busch›R5 RA / RB
Busch · R5 RA / RB
Busch RA 0025 E 421 — rotary vane, 0.5 mbar
Original title: Busch RA 0025 E 421 Vakuumpumpe 0,75kW 0,5 mbar Used
Market median (sold): €2.822 from 64 sales in this family
📍 Germany
🟡 OK with refurb
Suitable for WAVE101/FD260; typical refurb needed before use.
Condition from photo
Exterior clean, no visible oil leaks. Motor and pump housing intact. Nameplate legible. Used condition, age unknown.
Likely refurb / add-ons
- Oil change and filter service — €80–120
- Exhaust filter replacement — €60–90
- Soft-starter (optional, for grid stability) — €250–300
Watch out for
- No service history provided; internal wear cannot be assessed from photos.
- Asking price €1,949 is below median (€2,948) for this family; verify pump functi
WAVE AI estimate from photo + specs only — not a substitute for our physical pre-purchase check.
Specifications
- Type
- Oil-sealed rotary vane
- Pumping speed
- ~10 m³/h
- Water-vapour tolerance
- ~50 g/h
- Ultimate vacuum
- ≤ 0.1 mbar
- Source
- eBay
- Listing #
- eBay #266475584016
- Last verified
- Aug 11, 2026
Fits WAVE machines: WAVE101, FD260
Price history— Busch R5 RA / RB
Median €2.608 · 812 observations · €1–€62.418
Recent sales (Busch R5 RA / RB)
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Source: eBay sold listings (Apify aggregation). Year inferred from listing title when present.
Type plate (AI reading)
- Exact model
- RA 0025 E 421
- Serial
- 01015591
- Type
- RA 0025 E 421
- Serial No.
- 01015591
- Pressure p
- 0.5 hPa (mbar)
- Oil ISO VG
- 100
- Origin
- Made in Germany
- Manufacturer
- Dr.-Ing. K. Busch GmbH, Schauinslandstraße, Maulburg
- CE Mark
- Yes
Auto-extracted from one of the listing photos. Verify on the real unit before purchase.
What to look for on this family
Oil-sealed rotary vane with gas-ballast. Robust workhorse. Check ballast valve is intact and oil is clear amber. Run gas-ballast open under water vapour load.
Manufacturer datasheet — Busch R5 RA / RB
- Bauart
- Einstufige ölgedichtete Drehschieberpumpe mit Gasballast
- Saugvermögen (50 Hz)
- 10 – 100 m³/h (RA 0010 – RA 0100)
- Enddruck
- ≤ 0.1 mbar
- Wasserdampfverträglichkeit
- ca. 50 – 330 g/h
- Saugstutzen
- DN 25/40 ISO-KF
- Motorleistung
- 0.55 – 3.0 kW
- Drehzahl (50 Hz)
- 1500 1/min
- Ölsorte
- Busch VM 100 (mineralisch)
- Ölfüllung
- 0.5 – 4.0 l
- Ölwechsel-Intervall
- ca. 500 – 2000 Bh, je nach Anwendung
- Schutzart Motor
- IP55
- Hersteller
- Busch Vacuum Solutions
Curated from the manufacturer's official datasheet for this family / model. The specific pump may vary slightly by variant.