If you're dealing with sensitive biotech samples, aggressive solvents, or long-running freeze drying cycles, pump reliability isn’t optional. The Welch CRVpro series tackles these challenges with a design focused on durability, chemical resistance, and low maintenance. Whether you're running a glove box, vacuum oven, or mass spectrometer, CRVpro delivers consistent performance with minimal downtime.
Lower Operating Temperatures
CRVpro pumps run up to 10°C cooler than standard rotary vane pumps. This slows oil consumption and chemical activity inside the pump, extending service intervals and reducing maintenance costs.
Corrosion-Resistant Coatings
PTFE-coated oil cases and black oxide-treated pump modules resist corrosion from sublimed vapors. When paired with foreline traps, these features significantly extend pump life.
Large Oil Capacity
Dilutes chemical vapors more effectively, minimizing oil breakdown and chemical attacks.
Quiet Operation
Low noise levels (≤50 dB) make CRVpro suitable for lab environments where silence matters.
Forced Oil Lubrication
Fresh oil continuously bathes moving parts, stabilizing temperature and reducing wear.
Anti-Suck Back Valve
Protects your application from oil contamination during power failures.
Gas Ballast with Inert Gas Option
Reduces condensable vapors in the oil case. Ideal for applications involving water, acetyl nitrile, and other volatile compounds.
Dual Voltage Motors
CRVpro 2, 4, 6, and 8 models are switchable between 115V and 240V, supporting global use.
CRVpro pumps are compatible with:
| Model | Free Air Displacement (50 Hz) | Ultimate Pressure (Torr) | Oil Capacity (ml) | Noise Level (dB) | Weight (kg) |
|---|---|---|---|---|---|
| CRVpro 2 | 2.5 m³/h (41.7 l/min) | 2×10⁻⁴ | 450 | ≤50 | 15 |
| CRVpro 4 | 4 m³/h (67 l/min) | 2×10⁻⁴ | 1150 | 50 | 21 |
| CRVpro 6 | 6 m³/h (100 l/min) | 2×10⁻⁴ | 1000 | 55 | 22 |
| CRVpro 8 | 8 m³/h (133 l/min) | 2×10⁻⁴ | 2400 | 55 | 22.5 |
| CRVpro 16 | 18.3 m³/h (305 l/min) | 2×10⁻⁴ | 2200 | 55 | 37 |
| CRVpro 24 | 26.2 m³/h (436 l/min) | 2×10⁻⁴ | 2100 | 55 | 38.5 |
| CRVpro 30 | 33.1 m³/h (551 l/min) | 2×10⁻⁴ | 2100 | 55 | 39.5 |
Their cool-running design, large oil capacity, and corrosion-resistant coatings reduce chemical degradation and extend service intervals, making them ideal for long-duration processes like lyophilization.