" These oil-free pumps are ideal for for basic lab operations. They are suited for applications requiring a rough vacuum of 648 to 752mm Hg (251/2 to 2919/32" Hg) and free air displacement of up to 201L/min. (7.1cfm). Standard-duty pumps are protected from moisture and corrosion and use a WOB-L piston pumping mechanism. A liquid trap attached to each pump traps water if it is accidentally drawn into the line. Discharge air noise is muffled with a silencer. Vacuum gauge included. The 115V, 60Hz maintained on/off foot switch (14233-684 - sold separately) allows hands-free operation of pumps. Made of durable black painted steel, the switch features a nonskid base and foot treadle pads to ensure secure footing during repeated operations. Comes with a 2.4m (8') cord. Note: Standard-duty pumps are not recommended for pumping acid, base, or organic vapors. Ordering Information: Chemical-duty models are also available - contact your VWR representative for more information. "
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