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Vacuum Pump BTpro 170 Diaphragm Pump with cUL

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New for Botanical Oils processor for post-extraction purification preparation for distillation. Welch’s BTpro vacuum pump family has the necessary flow and vacuum level to provide fast performance for your size of rotary evaporator, falling film evaporator, filtering setup, filtering tables, and purge ovens.

These chemical duty PTFE diaphragm pumps are oil-free. All 5 models are certified CSA or c-UL-us to help satisfy regulatory requirements.

The pumping action and deep vacuum comes from the movement of PTFE diaphragms within PTFE heads. All wetted services in the flow path are made of fluoroplastic making each BTpro pump highly chemically resistant. As a result, the BTpro vacuum pump series is near-zero maintenance. A cold trap placed in-line with your BTpro pump is needed if terpenes are part of the flow path.
The BTpro40 and BTpro70 models employ patented valve and diaphragm technology that generates a deep 15 Torr vacuum pressure with each PTFE head. In addition, both pump models have built-in tuneable vacuum to control evaporation rate. The tunable vacuum adjustment can also be used to stop unintended boiling and bumping.
A chemically resistant, manual vacuum regulator with stainless steel dial gauge is available for BTpro100. See ordering information for further details.


  • High flow for faster processing
  • Deep vacuum for higher purity
  • Chemically resistant for long service interval
  • Oil-free for low maintenance


  • Rotary Evaporators and Falling Film Evaporators
  • Vacuum Purge Ovens
  • Vacuum Filtering Flask Setups, Filter Table Setups (Winterized Oil)
  • Rotary
  • Rotary



Welch provides state-of-the-art vacuum pumps for numerous applications in chemical and biological laboratories, as well as for high vacuum manufacturing, air-conditioning and refrigeration.