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Welch™ Self-Cleaning Vacuum System

Complete oil-free dry vacuum systems for rotary evaporators and concentrators

Manufacturer:  Welch™ 202501

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Catalog No. 01-129-19



Corrosion-resistant PTFE diaphragm vacuum systems enable superior evaporation control and efficiency. Preserve your sample and your time with rapid, controlled solvent stripping from flasks up to 5L. Use 2 torr models for fast stripping of DMF.

Programmable Model 2028 enables walk-away control for up to five vacuum / time methods for 2 solvent samples.


  • Automatic self-cleaning purge maintains efficiency, extends diaphragm life
  • Free air displacement: 35 L/min (1.2 CFM)
  • Incremental ballast switch enables fast response to bumping/foaming
  • Inlet and exhaust separators protect pump and lab air from contaminants
  • Select 9 torr model for atmospheric B.P to 120°C; 2 torr model to B.P. 160°C


Order Info

Dimensions: 13.62L × 12W × 11.3 in. H (34.5 × 30.5 × 28.1cm). Net weight: 30 lb. (13.6kg)





29.5 Pa
0.2 hp
16.4 kg
30 lb.
35 L/min.
11.6 in.
13.6 in.
12 in.
115 V
36 lb.
1.5 A
115 V 60 Hz
13.6 kg
60 Hz
28.7 cm
34.5 cm
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