Welch DryFast diaphragm pumps are designed for harsh chemical duty processes and stand above the competition in performance. Welch DryFast vacuum pump provide tunable control, precisely within 1 Torr. The Welch DryFast is lightweight, with a control knob ergonomically easy to use, front and center of the pump. The Welch 2034B-01 chemical duty diaphragm vacuum pump is an excellent pump for evaporation medium boiling point solvents, such as water and toluene. Contact your Chemtech Scientific representative for best practices and set up information.