Welch® WOB-L Laboratory Vacuum Pumps for Filtration

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from $1,465.00 $1,280.00

SKU DESCRIPTION MAXIMUM VACUUM ULTIMATE PRESSURE FREE AIR DISPLACEMENT ELECTRICAL QUANTITY PRICE ADD TO CART
variant 2561B-50 WOB-L Lab Vacuum Pump for Filtration 29.8 in Hg 5 Torr (6.7 mbar) 2.3 cfm (65 L/min) 115V, 60Hz 1 Each
$1,845
$1,603
variant 2567B-50 WOB-L Lab Vacuum Pump for Filtration 27.6 in Hg 60 Torr (80 mbar) 3.5 cfm (100 L/min) 115V, 60Hz 1 Each
$1,465
$1,280
variant 2581B-50 WOB-L Lab Vacuum Pump for Filtration 29.8 in Hg 5 Torr (6.7 mbar) 3.5 cfm (100 L/min) 115V, 60Hz 1 Each
$2,520
$2,177
variant 2585B-50 WOB-L Lab Vacuum Pump for Filtration 27.6 in Hg 60 Torr (80 mbar) 7.1 cfm (201 L/min) 115V, 60Hz 1 Each
$2,085
$1,807

Reliable WOB-L Piston pumps are perfect for many common laboratory vacuum applications. Features: Vacuum and Pressure - to 100 Torr (26"Hg). Includes Vacuum and Pressure Regulators and Gauges - simple to adjust and monitor vacuum level and delivery pressure. Inlet Water Trap - float ball rises to seal off pump from accidental ingestion of water. Muffler quiets pump and filters discharge air. For use with dry or aqueous vapor applications only.

Key Features

  • Economical
  • Oil Free
  • Adjustable Vacuum / Pressure

Suggested Applications

  • Replace Water Aspirator
  • Vacuum Filtration
Model Number 2561 2567 2581 2585
Applications Vacuum Ovens less than 2 ft3 (57 liters); Vacuum filtration up to 6 funnels Vacuum filtration up to 6 funnel manifold; Lab automation - aspiration of systems utilizing 96 / 256 well format; Welchnet lab installations up to 10 outlet fixtures (geneneral use, filtration) Vacuum Ovens 2 to 4.5 ft3 (57 to 127 liters); Glove Box transfer chamber and purge / fill cycles - up to 30 ft3 (0.84 m3) Vacuum filtration up to (2) 6 funnel manifolds; Lab automation - aspiration of systems utilizing 96 / 256 well format; Welchnet lab installations up to 20 outlet fixtures (geneneral use, filtration)
Type Laboratory Vacuum Pump Laboratory Vacuum Pump Laboratory Vacuum Pump Laboratory Vacuum Pump
Free Air Displacement cfm (l/min.) @60Hz 2.3 (66) 3.5(100) 3.5(100) 7.1(201)
Free Air Displacement m3/hr (l/min.) @50Hz 3.3 (55) 4.9(83) 4.9(83) 10(168)
Ultimate Pressure 5(6.7) 60(80) 5(6.7) 60(80)
Maximum Vacuum 29.8 27.6 29.8 27.6
Max Pressure PSIG (pascal)
Motor Horsepower (watts) 1/3(250) 1/3(250) 1/3(250) 1/3(250)
Adjustable Vac. / Gas Ballast Yes Yes Yes Yes
Tubing Needed 1/4(7) 1/4(7) 1/4(7) 1/4(7)
Intake Thread NPT 1/4 1/4 1/4 1/4
Overall Dimensions LxWxH in. (cm) 17.3x6.5x10.5 (43.9x16.5x26.7) 15.0x10x10 (38.1x25.4x25.4) 17x7.5x12 (43.2x42.3x19.1) 17x7.5x12 (43.2x42.3x19.1)
Ship Weight 24(10.9) 24(10.9) 32(14.5) 32(14.5)
Shipping Carton Dimensions LxWxH in. (cm) 21x12x15 (53x30x38) 21x12x15 (53x30x38) 21x12x15 (53x30x38) 21x12x15 (53x30x38)
Intake Catch Jar Yes Yes Yes Yes
Adjustable Vacuum Knob Knob Knob Knob
Adjustable Pressure
Vacuum Gauge Dial Dial Dial Dial