The Welch Vacuum 2511B-01 one-head WOB-L-style piston pump has an 11 liter per minute (LPM) free air displacement with vacuum to 219 Torr. The portable utility vacuum/pressure pump is suitable for use in applications such as aspiration and vacuum drying in non-corrosive environments. It is driven by a 1/30 HP motor that accepts 115V, 60Hz input power. It connects to 3/16" inside diameter vacuum system tubing (sold separately).
Welch-Ilmvac, a subdivision of Denver Gardner, manufactures vacuum pumps, systems, and components for industrial and research applications under the Welch and Ilmvac brand names. Denver Gardner, founded in 1859, is headquartered in Milwaukee, WI.