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
📍 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
- Jul 5, 2026
Fits WAVE machines: FD260, FD440
Price history— Pfeiffer Duo
Median €819 · 1230 observations · €66–€9.484
Recent sales (Pfeiffer Duo)
- €744May 13, 2026Pfeiffer DUO 3 PK D41 062 K / Agilent G7077-80055 Rotary Vane Vacuum Pump
- €3.255May 1, 2026(Reserved)Teledyne AQUATek 100 Stratum Purge&Trap w/Pfeiffer DUO 2.5 G3170-80024
- €1.457Apr 14, 2026Pfeiffer DUO 65M PK D46 Vacuum Pump
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.