Compact yet powerful belt-drive vacuum pump. Delivers deep vacuum with quiet operation. Ideal for laboratory freeze drying, ovens, filtration, and vacuum distillation setups.
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The Welch 1400B-01 DuoSeal Vacuum Pump is a small, belt-driven rotary vane pump renowned for its rugged design and quiet, vibration-free performance. Trusted by labs for decades, the DuoSeal 1400B-01 consistently delivers deep vacuum levels (to 1 x 10⁻⁴ Torr)—ideal for sensitive applications requiring stable, clean vacuum.
Its low-speed, oil-sealed two-stage mechanism offers long service life, low backstreaming, and dependable performance in high-vacuum tasks such as freeze drying, distillation, degassing, and vacuum ovens.
This compact version of Welch’s legendary DuoSeal series fits neatly into benchtop and mobile cart configurations, and is easy to maintain with accessible belt and oil components. An ideal choice for demanding lab, academic, and industrial environments.
Key Features
Specifications Table
| Specification | Welch DuoSeal 1400B-01 |
|---|---|
| Pump Type | Rotary Vane, Belt-Driven |
| Number of Stages | Two |
| Ultimate Vacuum | 1 x 10⁻⁴ Torr |
| Displacement | ~0.9 CFM |
| Voltage | 115V / 60 Hz / 1 Phase |
| Oil Type | Welch 1407K-11 or 1407K-15 |
| Weight | ~50 lbs |
| Noise Level | Quiet operation (~54 dB) |
| Applications | Freeze Drying, Filtration, Degassing, Ovens |
| Weight | 70 lbs |
|---|---|
| Dimensions | 20 × 12 × 13 in |
