DPL-2V28 is a two-stage oil-sealed rotary vane pump with rated pumping speed 27.5 m³/h (50Hz) and 33 m³/h (60Hz), motor 0.75 kW, powered by single-phase 220V or three-phase 380V, rated speed 1440 / 1720 r/min (50/60Hz). The unit weighs 44 kg and measures 598 × 180 × 251 mm.
Ultimate pressure is 1×10⁻³ mbar with gas ballast off and 1.5×10⁻² mbar with gas ballast on. Inlet is NW25. Exhaust is a 15 mm OD nozzle (removable from a 3/4″ BSP threaded port). Noise is 57 dB(A), oil capacity 1.2–1.5 L.
It is in the same series as 2V18 with higher pumping speed. It is used for pharmaceutical freeze-drying, optical coating, refrigeration leak detection, and scientific instruments. It is also commonly used with a Roots pump as the backing pump of a medium-vacuum system.
Two-stage pumps are sensitive to oil type and oil change intervals. Maintain them according to the manual. Confirm 60Hz and non-standard configurations before ordering.
Pumping speed, connections, voltage, and accessory configuration can be adjusted to the order-specific operating conditions. Technical parameters are subject to product documentation. Before selecting a model, send us your pumping speed requirements, target vacuum level, gas type, and site voltage for confirmation.
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Specifications
| Model | DPL-2V28 |
|---|---|
| Rated pumping speed (50/60Hz) | 27.5 / 33 m³/h |
| Ultimate pressure (gas ballast off) | 1×10⁻³ mbar / 7.5×10⁻⁴ Torr |
| Ultimate pressure (gas ballast on) | 1.5×10⁻² mbar / 1.1×10⁻² Torr |
| Motor power | 0.75 kW (50Hz) |
| Voltage | Single-phase 220V / Three-phase 380V |
| Rated speed | 1440 / 1720 r/min (50/60Hz) |
| Inlet connection | NW25 |
| Exhaust port connection | 15 mm OD nozzle, removable from 3/4″ BSP threaded port |
| Noise | 57 dB(A) |
| Oil capacity | 1.2–1.5 L |
| Weight | 44 kg |
| Dimensions (mm) | 598 × 180 × 251 |
| Material | Cast iron / cast aluminum |
| Operating ambient temperature | 0 ℃ to 40 ℃ |