Used Vacuum Pumps›Pfeiffer›Duo
Pfeiffer · Duo
Pfeiffer Duo 120 — rotary vane, 120 m³/h with stand
Original title: Pfeiffer Vacuum WKP 1000 A mit DUO 120 Pumpenstand
Market median (sold): €744 from 26 sales in this family
📍 Germany
🔴 Check carefully
Oversized for FD260/FD440; price significantly above market median.
Condition from photo
Exterior clean, mounted on sturdy frame with motor. No visible oil leaks or damage. Labels readable. Internal wear cannot be assessed.
Likely refurb / add-ons
- Oil change and filter service (~€100)
- Soft-starter or VFD retrofit (~€280–500)
Watch out for
- Asking price €8,000 is ~7–12× median (€1,100) for Pfeiffer Duo family.
- Duo 120 (120 m³/h) is oversized for FD260/FD440 (typically 10–20 m³/h pumps).
- Last service recorded 2006; operational status and seal integrity unknown.
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
- 1999 (per nameplate)
- Source
- eBay
- Listing #
- eBay #175686959241
- Last verified
- Aug 29, 2026
Fits WAVE machines: FD260, FD440
Price history— Pfeiffer Duo
Median €873 · 1969 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
- €1.859Aug 9, 2026ROTARY VANE VACUUM PUMP PFEIFFER DUO 2.5
- €806Aug 9, 2026Pfeiffer Balzers DUO 012A UF6 Version Fomblin Vacuum Pump 12 m³/h
Source: eBay sold listings (Apify aggregation). Year inferred from listing title when present.
Type plate (AI reading)
- Exact model
- DUO 120
- Serial
- 20011833
- Year (plate)
- 1999
- Type
- DUO 120
- Manufacturer Part No.
- PK D23 602
- Volume flow rate
- 120 m³/h
- Speed of rotation
- 960 1/min
- Drive power
- 4 kW
- Operating agent
- P 3
- Electrical (50 Hz)
- 230/400 V 50 Hz
- Origin
- Made in Germany
- Year
- 1999/10
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.