Welch® ChemStar Dry Oil-Free Deep Vacuum Systems
Image SKU Description Ultimate Pressure Free Air Displacement Electrical Quantity Price Add to Cart
2070B-01 ChemStar Dry Oil-Free Vacuum System 0.05 Torr (0.07 mbar) 6.9 cfm (196 L/min) 115V, 60Hz 1 Each
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2080B-01 ChemStar Dry Oil-Free Vacuum System 0.04 Torr (0.05 mbar) 12.4 cfm (350 L/min) 115V, 60Hz 1 Each
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Key Features

  • Oil-free deep vacuum
  • Chemically resistant
  • Plug and Play operation

The ChemStar Dry vacuum system is an alternative to oil-sealed rotary vane pumps for chemical applications requiring a deep vacuum. The deep, oil-free vacuum is generated by a proprietary vacuum roots blower backed by a PTFE diaphragm pump. All major parts in contact with pumped vapor/gases are made of chemically resistant fluoroplastics or coated with a proprietary PTFE coating.

Pump speed across the entire operating pressure range - atmospheric to deep vacuum - is controlled using patented control software technology. The control software provides plug-and-play operation.

Service interval is extended by integrated self-cleaning function that purges condensed vapors in the pump at shut-down. A foreline catchpot trap is recommended to prevents ingestion of liquids. A foreline cold trap is recommended to prevent sticky-substances from entering pump and to protect pumpfrom flash evaporation applications (ie vacuum ovens) thatgenerate high vapor load exceed pumping capacity.

Eliminate messy oil maintenance, the threat of oil contamination to your sample, and cold trapping in many applications. Handle even high chemical vapor loads for simple, efficient deep vacuum. ChemStar Dry excels where no dry vacuum pump has before - the first practical alternative to oil-seal rotary vane pumps.

ChemStar Dry automates High Performance vapor flow (to 150L/min) at working vacuum levels (0.08 to 10 torr). Chemical resistant, max. vacuum is 0.05 torr. Smart system control coordinates vacuum blower / PTFE diaphragm pump operation to respond to any vapor load quickly and efficiently. Self-cleaning air purges remove condensable vapors between runs for repeatable top performance and extended diaphragm life.

Applications include:

  • Schlenk line drying manifolds
  • Vacuum ovens
  • Freeze dryers up to 6 L
  • Centrifugal concentrators
  • Many other deep vacuum applications

Save the time, expense, and hassle of oil-seal vacuum pumping with ChemStar Dry – a cutting edge product from Welch Vacuum Technology.


Model 2070 2080
Free Air Displacement, cfm(l/min) @ 2 torr (2.7 mbar) 6.9 (196) 12.4 (350)
Ult Vac. Pressure, torr (mbar) @60 Hz 0.05 (0.07) 0.04 (0.05)
Ult Vac. Pressure, torr (mbar) @50 Hz 0.07 (0.09) 0.04 (0.05)
Running Amps 3 3
Intake and Exhaust Connection NW25 NW25
Weight, lb (kg) 50 (23) 88 (40)
Overall Dimensions, LxWxH, in (cm) 18 x 8 x 18 (46 x 22 x 47) 23 x 11 x 18 (57 x 27 x 45)
Ship Weight, lb (kg) 75 (34) 115 (52)
Shipping Carton Dimensions, LxWxH, in (cm) 26.5x 26.5 x 27(68 x 68 x 69) 26.5x 26.5 x 27 (68 x 68 x 69)

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