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Welch™ Self-Cleaning Vacuum System

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

$5090.00 - $6380.00


Certifications/Compliance CE, CSA
Flow Rate 35 L/min.
Horsepower 0.2 hp
Overall Length (English) 13.6 in.
Overall Length (Metric) 34.5 cm
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Products 3
Catalog Number Mfr. No. Amperage Frequency Model Voltage Price Quantity & Availability  
Catalog Number Mfr. No. Amperage Frequency Model Voltage Price Quantity & Availability  
01-257-120 View Documents Welch™
1.5 A 50 Hz 2026 115 V Each for $5,830.00
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01-129-19 Accessories View Documents Welch™
1.5 A 60 Hz 2025 115 V Each for $5,090.00
Add to cart
01-257-121 View Documents Welch™
1.5 A 60 Hz 2027 115 V Each for $6,380.00
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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 x 12W x 11.3 in. H (34.5 x 30.5 x 28.1cm). Net weight: 30 lb. (13.6kg)





0.2 hp
34.5 cm
36 lb.
30 lb.
12 in.
35 L/min.
13.6 in.
16.4 kg
13.6 kg
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