Used Vacuum Pumps›Pfeiffer›Duo
Pfeiffer · Duo
Pfeiffer Duo 250 + WKP 1000 A + Duo 20 — rotary vane, 20–250 m³/h
Original title: Pfeiffer Vacuum DUO 250, WKP 1000 A, DUO 20 Pumpenstand, 3 Vakuumpumpen
Market median (sold): €744 from 26 sales in this family
📍 Germany
🔴 Check carefully
Three-pump bundle exceeds WAVE FD260/FD440 needs; Duo 250 alone suitable but age/condition unclear.
Condition from photo
Duo 250 mounted on frame with motor, hoses, and control cabinet visible. Exterior paint worn; no obvious leaks or damage. Age and internal wear cannot be assessed from photos.
Likely refurb / add-ons
- Oil change + filter service (~€110)
- Soft-starter or VFD retrofit (~€280–500)
- Exhaust filter replacement (~€80)
Watch out for
- Bundle of three pumps (Duo 250, WKP 1000 A, Duo 20) — only Duo 250 matches WAVE
- Asking price €7,200 is ~6–7× median market value (€1,100) for a single Duo-famil
- No visible nameplate on Duo 250 itself in photos; age and service history unknow
WAVE AI estimate from photo + specs only — not a substitute for our physical pre-purchase check.
Specifications
- Type
- Oil-sealed rotary vane
- Pumping speed
- ~20 m³/h
- Water-vapour tolerance
- ~120 g/h
- Ultimate vacuum
- ≤ 0.001 mbar
- Year
- 2000 (per nameplate)
- Source
- eBay
- Listing #
- eBay #167827362930
- Last verified
- Aug 19, 2026
Fits WAVE machines: FD260, FD440
Price history— Pfeiffer Duo
Median €875 · 1938 observations · €66–€9.484
Recent sales (Pfeiffer Duo)
- €735Aug 9, 2026Pfeiffer Vacuum Pump DUO 11 / PK D59 721 C / 0.25-0.3 kW
- €1.075Aug 9, 2026Pfeiffer DUO 030 A Vacuum Pump 30m³/h + AEG AM 90 SX4 Q4 1.1kW 1390/1660RPM Used
- €860Aug 9, 2026Pfeiffer Duo 2.5 PK D41 064 G Vacuum Pump Max 2.9m³/h 3600/min G3870-80056 Used
- €666Aug 9, 2026Pfeiffer DUO 2.5 PK D41 064F Agilent G3170-80026 Vacuum Pump 220-240V Used
- €656Aug 9, 2026Pfeiffer Duo 2.5 PK D41 064F Vacuum Pump
- €677Aug 9, 2026Pfeiffer DUO 2.5 PK D41 064F Agilent G3170-80026 Vacuum Pump 3600 RPM Used
- €860Aug 9, 2026Pfeiffer Duo 2.5 PK D41 064 E Vacuum Pump Max: 2.9m³/h 3000/min Used
- €536Aug 9, 2026Pfeiffer Balzers DUO 004 B Rotary Vane Vacuum Pump -used-
- €644Aug 9, 2026Pfeiffer Vacuum DUO 2.5 PK D41 602 A Vacuum Pump Vacuum Pump 0.13kW 2.5m³/h -used
- €644Aug 9, 2026Pfeiffer Vacuum DUO 2.5 PK D41 712 C Vacuum Pump Vacuum Pump 0.15kW 2.9m³/h -used
- €849Aug 9, 2026Pfeiffer Vacuum DUO 10 Rotary Vane Vacuum Pump 10 m³/h PK D62 712 B
- €742Aug 9, 2026Pfeiffer Balzers DUO 008 B Halogen Res. Vacuum pump 8 m³/h Fomblin 220V
Source: eBay sold listings (Apify aggregation). Year inferred from listing title when present.
Type plate (AI reading)
- Exact model
- DUO 250
- Serial
- 20033737
- Year (plate)
- 2000
- Manufacturer Part No.
- PK D27 602
- Pumping speed S(N₂)
- 250 m³/h
- Speed
- 980/1255 1/min
- Drive power
- 7.5 kW
- Electrical
- 230/400 V 50/60 Hz
- Operating agent
- P 3
- Origin
- Made in Germany
- Approvals
- CE 2000
Auto-extracted from one of the listing photos. Verify on the real unit before purchase.
What to look for on this family
Two-stage oil-sealed with gas-ballast. Common pulls from semicon and lab decommissioning — check the oil sight glass before bidding.
Manufacturer datasheet — Pfeiffer Duo
- Bauart
- Zweistufige ölgedichtete Drehschieberpumpe
- Saugvermögen (50 Hz)
- 1.25 / 2.5 / 5 / 10 / 20 / 35 / 65 m³/h (modellabhängig)
- Enddruck (ohne Gasballast)
- ≤ 6 × 10⁻⁴ mbar
- Enddruck (mit Gasballast)
- ≤ 4 × 10⁻³ mbar
- Wasserdampfverträglichkeit
- ca. 110 g/h bei DUO 10
- Wasserdampfkapazität
- ca. 30 mbar (mit Gasballast)
- Saugstutzen
- DN 16/25 ISO-KF (modellabhängig)
- Auslass
- DN 16/25 ISO-KF
- Betriebsspannung
- 1-Ph 230 V / 3-Ph 400 V (modellabhängig)
- Motorleistung
- 0.25 – 1.5 kW
- Drehzahl (50 Hz)
- 1500 1/min
- Drehzahl (60 Hz)
- 1800 1/min
- Ölsorte
- Pfeiffer P3 (mineralisch) bzw. F4 (synthetisch)
- Ölfüllung
- 0.4 – 2.0 l (modellabhängig)
- Ölwechsel-Intervall
- ca. 2000 Bh oder bei Verfärbung
- Geräuschpegel
- 52 – 60 dB(A)
- Gewicht
- 10.5 – 60 kg (modellabhängig)
- Umgebungstemperatur
- 12 – 40 °C
- Schutzart Motor
- IP54
- Hersteller
- Pfeiffer Vacuum GmbH, D-35614 Asslar
Curated from the manufacturer's official datasheet for this family / model. The specific pump may vary slightly by variant.