WOB-L, DryFast, and DryFast Ultra Dry Vacuum Pumps, Welch
These oil-free vacuum pumps are ideal for filtering, desiccating, cell harvesting, vacuum blotting, aspirating, degassing, and distilling. Dryfast ultra dry vacuum pumps 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). Dryfast ultra vacuum pumps 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 vacuum 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. Dryfast ultra dry vacuum 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. Vacuum pumps are made of durable black painted steel, the switch features a nonskid base and foot treadle pads to ensure secure footing during repeated operations. Vacuum pumps comes with a 2.4m (8') cord. Note: Standard-duty vacuum pumps are not recommended for pumping acid, base, or organic vapors.
| Free Air Displacement, L/min. (cfm) | Maximum Vacuum, mm Hg (in. Hg) | Ultimate Pressure, mbar (Torr) | HP | Tubing Needed, I.D., mm (in.) | Dimensions, L x W x H, cm (in.) | Shipping Weight, kg (lbs.) | Item No | Unit | Price |
| WOB-L Standard-Duty Models | |||||||||
| 22 (0.78) | 660.4 (26) | 133 (100) | 1/8 | 7 (1/4) | 20.6 x 22.4 x 25.4 (81/8 x 813/16 x 10) | 6.6 (15) | 54994-106 | Each | $560.92 |
| 34 (1.2) | 690.9 (27.2) | 93 (70) | 1/8 | 7 (1/4) | 20.6 x 22.4 x 25.4 (81/8 x 813/16 x 10) | 6.6 (15) | 54994-110 | Each | $655.28 |
| 45 (1.6) | 701 (27.6) | 80 (60) | 1/4 | 7 (1/4) | 25.4 x 19.1 x 22.9 (10 x 71/2 x 9) | 8.4 (18.5) | 80077-612 | Each | $731.30 |
| 60 (2.1) | 757 (29.8) | 6.7 (5) | 1/3 | 10 (3/8) | 43.9 x 16.5 x 26.7 (175/16 x 61/2 x 101/2) | 9.7 (21.5) | 14230-628 | Each | $1,794.53 |
| 100 (3.5) | 701 (27.6) | 80 (60) | 1/4 | 10 (3/8) | 38.1 x 25.4 x 25.4 (15 x 10 x 10) | 9.7 (21.5) | 80077-616 | Each | $1,435.04 |
| 100 (3.5) | 757 (29.8) | 6.7 (5) | 1/3 | 10 (3/8) | 43.2 x 19.1 x 30.5 (17 x 71/2 x 12) | 13.4 (29.5) | 14230-656 | Each | $2,437.21 |
| 201 (7.1) | 701 (27.6) | 80 (60) | 1/3 | 10 (3/8) | 43.2 x 19.1 x 30.5 (17 x 71/2 x 12) | 13.4 (29.5) | 54970-544 | Each | $2,017.91 |
| Chemical-Duty Models | |||||||||
| 12.7 (0.45) | 647.7 (25.5) | 146 (110) | 1/12 | 7 (1/4) | 16 x 14 x 18.8 (65/16 x 51/2 x 71/2) | 3.8 (8.4) | 21150-414 | Each | $1,094.33 |
| 22 (0.78) | 660.4 (26) | 133 (100) | 1/5 | 7 (1/4) | 25.4 x 17.8 x 17.5 (10 x 7 x 67/8) | 8.2 (18) | 14221-492 | Each | $1,190.42 |
| 45 (1.6) | 678.2 (26.7) | 106 (80) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 21150-412 | Each (40 L) | $1,368.98 |
| 64 (2.2) | 678.2 (26.7) | 106 (80) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 14224-392 | Each | $2,499.62 |
| DryFast Chemical-Duty Models | |||||||||
| 22 (0.78) | 751.8 (29.6) | 12 (9) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 21150-410 | Each (22 L) | $1,930.92 |
| 32 (1.1) | 751.8 (29.6) | 12 (9) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 14224-390 | Each | $2,346.68 |
| DryFast Ultra Chemical-Duty Models | |||||||||
| 22 (0.78) | 758.2 (29.9) | 2.7 (2) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 12000-552 | Each | $2,751.70 |
| 32 (1.1) | 758.2 (29.9) | 2.7 (2) | 1/5 | 7 (1/4) | 25.4 x 25.4 x 17.5 (10 x 10 x 67/8) | 8.2 (18) | 12000-558 | Each | $3,304.54 |
| Accessory | |||||||||
| Maintained Foot Switch | — | — | — | — | — | 14233-684 | Each | $114.68 | |
Red Vacuum Rubber Tubing
Natural rubber tubing with extra-heavy wall especially recommended for vacuum work. Red Vacuum Rubber Tubing has a high resilience, good tensile and tear strength. Durometer hardness: Shore A, 50. Tensile strength: 2000–2600psi.
| I.D. x O.D., in. 50' Coil Length | Wall Thickness, in. | Item No. | Unit | Price |
| 1/4 x 1/2 | 1/8 | 62995-059 | Pack | $177.97 |
| 1/4 x 5/8 | 3/16 | 62995-062 | Pack | $267.78 |
| 1/2 x 11/8 | 5/16 | 62995-095 | Pack | $784.06 |
| 5/8 x 13/8 | 3/8 | 62995-120 | Pack | $785.36 |
| 3/4 x 11/2 | 3/8 | 62995-153 | Pack | $878.70 |
| 93/4' Coil Length | ||||
| 1/4 x 5/8 | 3/16 | 62995-335 | Pack | $61.71 |
| 1/2 x 11/8 | 5/16 | 62995-368 | Pack | $187.44 |
| 5/8 x 13/8 | 3/8 | 62995-390 | Pack | $286.33 |
| 3/4 x 11/2 | 3/8 | 62995-426 | Pack | $288.51 |
Tight-Seal Tubing Clamp Kit
Tight-Seal Tubing Clamp Kit works with all types of plastic and rubber tubing. Tight-Seal Tubing Clamp Kit is used for pressure, vacuum, and liquid applications when a tight seal is required. Chemical- and corrosion-resistant nylon clamps are ideal for use in a wide range of temperatures. Tight-Seal Tubing Clamps may be chemically and gas sterilized for biomedical or food applications. Tight Seal Tubing Clamps securely fasten tubing on connectors, pumps, glassware, and filtration units. One-piece reusable clamp squeezes shut for a leakproof seal. To release the tubing clamp, press down on side. Ordering Information: Kit is supplied with 13 clamp sizes to accommodate tubing. Five of each size are supplied. Clamp I.D. range for 13 sizes: 0.246–0.290", 0.360–0.406", 0.410–0.468", 0.475–0.536", 0.538–0.608", 0.597–0.665", 0.670–0.780", 0.730–0.830", 0.870–0.975", 0.953–1.093", 1.031–1.187", 1.250–1.425", and 1.406–1.610".
| Description | Item No. | Unit | Price |
| Clamp Kit | 21732-000 | Each | $52.11 |
| Replacement Clamps | |||
| 0.360–0.406" dia. | 89030-264 | Pack of 100 | $27.86 |
| 0.410–0.468" dia. | 89030-204 | Pack of 100 | $27.86 |
| 0.475–0.536" dia. | 89030-206 | Pack of 100 | $27.86 |
| 0.538–0.608" dia. | 89030-208 | Pack of 100 | $27.86 |
| 0.597–0.665" dia. | 89030-210 | Pack of 100 | $27.86 |
| 0.670–0.780" dia. | 89030-212 | Pack of 100 | $28.46 |
| 0.730–0.830" dia. | 46610-002 | Pack of 100 | $34.82 |
| 0.870–0.975" dia. | 89030-214 | Pack of 100 | $33.14 |
| 0.953–1.093" dia. | 89030-216 | Pack of 100 | $39.79 |
| 1.031–1.187" dia. | 89030-218 | Pack of 100 | $39.79 |
| 1.250–1.425" dia. | 89030-220 | Pack of 100 | $46.15 |
| 1.406–1.610" dia. | 89030-222 | Pack of 100 | $45.10 |
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