Welch Dryfast Diaphragm Vacuum Pumps

Welch DryFast Diaphragm Vacuum Pumps are oil-free, chemical-resistant vacuum pumps designed for laboratory and industrial applications. Featuring PTFE (Teflon) wetted parts and robust diaphragm technology, DryFast pumps deliver reliable, clean vacuum without oil contamination or maintenance hassles.

Perfect for aggressive vapors, solvents, and corrosive gases, they offer quiet operation, high flow rates, and excellent chemical resistance — making them ideal for rotary evaporation, vacuum filtration, degassing, and solvent recovery.

Welch® DryFast® diaphragm vacuum 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.

Why Choose Welch DryFast Pumps?

Superior Chemical Resistance — All wetted parts are PTFE-coated for excellent compatibility with aggressive solvents, acids, and basic vapors.
Oil-Free Operation — No oil changes, no contaminated oil disposal, and no risk of oil backstreaming — ideal for clean laboratory environments.
Advanced Vapor Management (AVM) — Convenient front-mounted control knob lets you fine-tune vacuum level and purge condensates for longer diaphragm life and faster evaporation.
Quiet & Reliable — Low noise, compact design, and continuous duty operation.
Broad Application Range — Perfect for rotary evaporation, vacuum ovens, filtration, degassing, drying, and Schlenk lines.

Available Models

From single-stage models (e.g., 2014 series) for medium vacuum needs to two-stage DryFast Ultra models (e.g., 2032, 2042, 2047 series) that reach as low as 2 Torr for high-boiling-point solvents.

Whether you need a compact pump for small rotovaps or a high-throughput model for demanding chemistry workflows, Chemtech Scientific carries the full line of Welch DryFast pumps with competitive pricing, expert support, and fast shipping.

Browse our full selection of Welch DryFast Chemical Duty Diaphragm Vacuum Pumps below. Need help selecting the right model? Contact our technical team at (484) 424-9415 or support@chemtechsci.com.