Welch BTPro Botanical Vacuum Pump

Welch BTPro Botanical Vacuum Pump


Welch BTpro vacuum pumps provide reliable performance and high flow for your rotary evaporator, glass reactor, vacuum purge oven, or winterization & filtration apparatus.



Pro100 - 115V 60Hz Pro170 - 115V 60Hz Pro40 - 115V 60Hz Pro70 - 115V 60Hz
Clear selection

Welch BTpro vacuum pumps are oil-free chemical duty diaphragm vacuum pumps. They include PTFE heads and diaphragms for maximum chemical resistance.

All wetted surfaces are made from fluoroplastic, making the pumps maintenance-free. However, a cold trap should always be used between the vacuum pump and application to prevent downstream contamination.

All BTpro models employ patented valve and diaphragm technology to generate a deep vacuum. The BTpro 40 & 70 also have a built-in vacuum control, for more precise evaporation rates. This helps mitigate accidental bumping or foaming during evaporation.

Features & Benefits:

  • High flow for faster processing and throughput
  • Deep, reliable vacuum capability
  • Chemically-resistant internals and diaphragms
  • Oil-free for minimal maintenance

System Specifications

MODEL BTpro 40 BTpro 70 BTpro 100 BTpro 170
Free Air Displacement @ 60Hz (CFM) 1.4 2.5 3.5 6
Ultimate Vacuum Pressure, Torr 15 15 6 6
Built-in Adjustable Vacuum Yes Yes ~ ~
Gas Ballast ~ ~ Yes Yes
Diaphragm Material PTFE PTFE PTFE PTFE
Inlet/Outlet Connection 3/8" Barb 3/8" Barb NW(KF)16 NW(KF)16
Agency (National Recognized Lab) CSA CSA cUL cUL
Weight, lbs 15 21.3 40.3 72.3
Overall Dimensions (L x W x H in.) 12 x 7 x 8.3 13.8 x 6.8 x 8.8 9 x 15 x 7 21 x 11 x 12
Electrical 115V 60Hz 1 Ph 115V 60Hz 1 Ph 115V 60Hz 1 Ph 115V 60Hz 1 Ph