Gardner Denver Welch WOB-L DryFast and DryFast Ultra Dry Vacuum Pumps Welch WOB-L Standard-Duty Models. Combining top-notch and uncompromising quality with an affordable price the Gardner Denver Welch WOB-L DryFast and DryFast Ultra Dry Vacuum Pumps Welch WOB-L Standard-Duty Models 2522B-01/ 54994-106 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: These oil-free pumps are ideal for filtering desiccating cell harvesting vacuum blotting aspirating degassing and distilling. 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). They are available in standard and chemical-duty models to accommodate pumping of a variety of vapors and gases. 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. Chemical-duty pumps utilize corrosion-resistant PTFE on all wetted surfaces allowing the pumps to withstand aggressive solvent base and acid vapors. Pumps also feature Kalrez/Chemraz elastomer valves. Discharge air noise is muffled with silencer. On 21150-410 a gas ballast valve acts to minimize vapor condensation inside the pump. The 115V 60Hz maintained on/off foot switch (14233-684) 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. Specifications for Gardner Denver Welch WOB-L DryFast and DryFast Ultra Dry Vacuum Pumps Welch 2522B-01 WOB-L Standard-Duty Models : Free AirDisplacementL/min. (cfm): 22 (0.78) MaximumVacuummm Hg (in. Hg): 660.4 (26) Ultimate Pressurembar (Torr): 133 (100) HP: 1/8 Tubing NeededI.D. mm (in.): 7 (1/4) DimensionsL x W x H cm (in.): 20.6 x 22.4 x 25.4 (81/8 x 813/16 x 10) ShippingWeightkg (lbs.): 6.6 (15) Welch No.: 2522B-01 Unit: Each Electrical: 115V 60Hz 1Ph (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Gardner Denver Welch products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Beakers Test Tubes Flasks & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Gardner Denver Welch Beakers Test Tubes Flasks & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Gardner Denver Welch WOB-L DryFast and DryFast Ultra Dry Vacuum Pumps Welch WOB-L Standard-Duty Models 2522B-01/ 54994-106 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Gardner Denver Welch. We also carry a full line of Gardner Denver Welch accessories to help meet your laboratory and scientific needs. For a complete selection of Gardner Denver Welch Beakers Test Tubes Flasks & Accessories please visit our Gardner Denver Welch page. For more brand name Beakers Test Tubes Flasks & Accessories please visit our Beakers Test Tubes Flasks & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Gardner Denver Welch WOB-L DryFast and DryFast Ultra Dry Vacuum Pumps Welch 2522B-01 WOB-L Standard-Duty Models