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The Welch Vacuum 2546B-01 one-head WOB-L-style piston pump has an 46 liter per minute (LPM) free air displacement with vacuum to 60 Torr and is suitable for use with gel dryers, concentrators, and rotary evaporators in non-corrosive environments. The vacuum/pressure pump has intake and exhaust catch jars for collecting condensation, vacuum and pressure gauges, and manually adjustable vacuum and pressure levels. It is driven by a 1/4 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.
Stafford W. Sheehan
Reviewed in the United States on May 19, 2019
I don't think I'm ever going to buy a pump that requires pump oil again. This thing works like a dream and is worth the extra money.
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