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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.
| Free AirDisplacement,L/min. (cfm): | 22 (0.78) | |
| MaximumVacuum,mm Hg (in. Hg): | 660.4 (26) | |
| Ultimate Pressure,mbar (Torr): | 133 (100) | |
| HP: | 1/8 | |
| Tubing Needed,I.D., mm (in.): | 7 (1/4) | |
| Dimensions,L x W x H, cm (in.): | 20.6 x 22.4 x 25.4 (81/8 x 813/16 x 10) | |
| ShippingWeight,kg (lbs.): | 6.6 (15) | |
| Welch No.: | 2522B-01 | |
| Unit: | Each | |
| Electrical: | 115V, 60Hz, 1Ph | |
Gardner Denver Welch WOB-L, DryFast, and DryFast Ultra Dry Vacuum Pumps, Welch 2522B-01 WOB-L Standard-Duty Models