Two-Stage Design
- Oil-recirculating rotary vane principle
- Direct-drive construction
- Air-cooled operation

Selected model: ARV-4
ARV SERIES · TWO-STAGE OIL-SEALED ROTARY VANE
Two compact high-vacuum models for laboratories, leak testing, analytical instruments and precision industrial applications.
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| Technical specification | ||
|---|---|---|
| Pump type | Two-stage oil-sealed rotary vane | Two-stage oil-sealed rotary vane |
| Nominal pumping speed — 50 Hz | 4 m³/h | 8 m³/h |
| Nominal pumping speed — 60 Hz | 4.8 m³/h | 9.6 m³/h |
| Ultimate pressure — gas ballast closed | 1 × 10⁻⁴ mbar | 1 × 10⁻⁴ mbar |
| Ultimate pressure — gas ballast open | 4 × 10⁻³ mbar | 4 × 10⁻³ mbar |
| Motor power | 0.55 kW | 0.55 kW |
| Inlet / exhaust connection | KF 25 | KF 25 |
| Oil capacity | 1 L | 1 L |
| Motor speed — 50 Hz | 1440 rpm | 1440 rpm |
| Motor speed — 60 Hz | 1720 rpm | 1720 rpm |
| Ambient temperature | 5–40 °C | 5–40 °C |
| Sound pressure level | <56 dB(A) | <56 dB(A) |
| Dimensions (L × W × H) | 460 × 145 × 220 mm | 460 × 145 × 220 mm |
| Weight | 23 kg | 23 kg |