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Welch™ DryFast™ and DryFast Ultra™ Chemical Duty Vacuum Pumps

Designed for use with rotary evaporators, concentrators and vacuum ovens

Manufacturer: welch™  2047B01

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Catalog No. 01-257-510

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Description & Specifications


Max. Pressure 70 torr
Air Displacement 70L/min.
Includes Pump, 6 ft powercord and plug (115V US standard)
For Use With (Application) Filtration manifolds, lab automation
Model 2047
Weight (English) 21.25 lb.
For Tube Size (English) 0.25 in.
Certifications/Compliance CE, CSA
Shipping Weight (English) 25 lb.
Length (Metric) 35.2cm
For Tube Size (Metric) 0.63cm
Weight (Metric) 9.6kg
Electrical Requirements 115V 60Hz
Material PTFE, Perfluoroelastomer
Horsepower 0.2hp
Flow Rate 70L/min.
Pump Head Material PTFE
Width (English) 6.8 in.
Length (English) 13.8 in.
Height (English) 8.8 in.
Hertz 60Hz
Height (Metric) 22.3cm
Voltage 115V
Shipping Weight (Metric) 11.3kg

Use these oil-free DryFast vacuum pumps for applications requiring chemical resistance. DryFast pumps provide mid-range vacuum (2 to 79 torr) with easy adjustment and low maintenance. Flow rates from 25 to 70 L/min). Select a DryFast model to suit your application needs:


  • Rotary Evaporation to 40°C atmospheric B.P.: 2014B-01 (1-head design)
  • Rotary Evaporation to 100°C atmospheric B.P.: 2034B-01, 2044B-01
  • Rotary Evaporation to 40°C atmospheric B.P.: 2032B-01, 2042B-01
  • Vacuum Filtration to 2 funnels: 2014B-01 (1-head design)
  • Vacuum Filtration to 6 funnels: 2037B-01, 2047B-01
  • Vacuum Ovens to 1.5 ft³: 2042B-01
  • Vacuum Ovens to 4.5 ft³: 2047B-01

Design Advantages
  • PTFE / fluorinated contact surfaces
  • Efficient 2-head diaphragm design reduces maintenance
  • Advanced Vapor Management knob for easy vacuum adjustment
  • Compact, portable, quiet
  • Readily connects using ¼ in. ID tubing
  • All listed models 115V 60 Hz