WOB-L, DryFast, and DryFast Ultra Dry Vacuum Pumps, Welch
is a reliable and dependable addition to the
Gardner Denver Welch Laboratory Glassware
family of products.
Combining top-notch and uncompromising quality with an affordable price, the
WOB-L, DryFast, and DryFast Ultra Dry Vacuum Pumps, Welch 2581B-50 / 14231-884
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.
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
with a full manufacturer's warranty in addition to our own
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lab consumables, and other products to help fulfill your specific needs.
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In addition to the WOB-L, DryFast, and DryFast Ultra Dry Vacuum Pumps, Welch 2581B-50/ 14231-884,
we carry a full complement of Laboratory Glassware 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 Laboratory Glassware,
please visit our Gardner Denver Welch page. For more brand name
Laboratory Glassware please visit
our Laboratory Glassware store section.
To see our complete line of lab, medical, industrial, and scientific products, please see our
science and lab equipment online catalog.