The Welch DryFast and DryFast Ultra vacuum pumps are oil-free, chemical-resistant diaphragm pumps engineered for precise vacuum control in lab applications such as rotary evaporation, vacuum ovens, and concentrators. With flow rates from 25 to 70 L/min and vacuum capability down to 2 Torr, these pumps offer consistent performance with minimal maintenance.
Key Features:
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Chemical-Resistant PTFE/fluorinated contact surfaces
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Oil-free diaphragm design – clean and maintenance-friendly
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Advanced Vapor Management knob for easy vacuum tuning
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Quiet, compact, and portable
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Universal connectivity with ¼ in. ID tubing
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Voltage: 115V, 60Hz
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Certifications: CSA, CE marked
Application Guide:
| Application | Recommended Models |
|---|---|
| Rotary Evaporation (≤40 °C B.P.) | 2014B-01 (1-head), 2032B-01, 2042B-01 |
| Rotary Evaporation (≤100 °C B.P.) | 2034B-01, 2044B-01 |
| Vacuum Filtration (2 funnels) | 2014B-01 |
| Vacuum Filtration (up to 6 funnels) | 2037B-01, 2047B-01 |
| Vacuum Ovens (up to 1.5 ft³) | 2042B-01 |
| Vacuum Ovens (up to 4.5 ft³) | 2047B-01 |
Specifications
| 0.2 hp | |
| 11.3 kg | |
| CE, CSA | |
| PTFE (Pump Head), Perfluoroelastomer | |
| 21.25 lb. | |
| 60 Hz | |
| 22.3 cm | |
| 35.2 cm | |
| 25 L/min. | |
| 9 torr |
| 25 lb. | |
| Pump, 6 ft powercord and plug (115V US standard) | |
| 115 V 60 Hz | |
| 2034 | |
| 9.6 kg | |
| 8.8 in. | |
| 13.8 in. | |
| 6.8 in. | |
| Rotary Evap. BP to 100°C | |
| 115 V |