Welch™ Self-Cleaning Vacuum System

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

Manufacturer: Welch™ 202801

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Catalog No. 01-257-154

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    Horsepower 0.2hp
    Voltage 115V
    Hertz 50Hz
    Height (English) 11.3 in.
    Height (Metric) 28.7cm
    Width (English) 12 in.
    Length (English) 13.6 in.
    Length (Metric) 34.5cm
    Shipping Weight (English) 36 lb.
    Shipping Weight (Metric) 16.4kg
    Amperage 1.5A
    Certifications/Compliance CE, CSA
    Flow Rate 35L/min.
    Electrical Requirements 115V 50Hz
    For Tube Size (English) 0.25 in.
    For Tube Size (Metric) 0.63cm
    Material PTFE
    Model 2028 - Programmable
    Weight (English) 30 lb.
    Weight (Metric) 13.6kg

    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


  • Description & Specifications

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