Welch Vacuum 2581B-50 Standard Duty Pump, 2 …
The Welch Vacuum 2581B-50 two-head WOB-L-style piston pump has a 100 liter per minute (LPM) free air displacement with vacuum to 5 Torr and is suitable for use with gel dryers, concentrators, and rotary evaporators in non-corrosive environments.