Welch “ChemStar Dry” Model 2070 Oil Free Deep Vacuum System - 115V, 60Hz, 1 Phase.

6.9 CFM, .05 Torr/29.9”HgV


Combination roots blower and diaphragm pump, a chemical resistant, dry oil free vacuum system for deep vacuum applications.  Eliminates oil related maintenance and oil vapor back streaming to contaminate product while providing deep vacuum.  Plug and play software operation. Self-cleaning function purges condensed vapors during shut down to extend service intervals further.  High flow rate with deep vacuum. .05 Torr/29.72” HgV.


Applications: Schlenk lines, vacuum ovens, freeze dryers, centrifugal concentrators. Suitable for all applications where high gas flow and deep vacuum are needed.  


Built for durability, reliability, long service life, ease of use. Known for chemical use, wide range of flow rates, and efficient pumping capacity into deep vacuum. 


  • Oil free operation – zero oil related maintenance
  • No oil vapor back streaming into vacuum line to contaminate
  • Chemical resistant with PTFE coatings on internals
  • Handles high chemical vapor loads
  • Deep vacuum .05 Torr to 10 Torr (29.5” HgV to 29.9” HgV)
  • Selfcleaning air purge reduces condensation and maintenance
  • Easy plug and play software operation
  • Long lifetime and repeatable results


Additional motor options available.

Additional accessories/cold traps available available for inlet, exhaust, or application.

Complete package systems available.

Welch "ChemStar" Model 2070 Oil Free Deep Vacuum System

SKU: 2070B-01
$9,500.00 Regular Price
$8,360.00Sale Price