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Welch™ Standard-Duty Vacuum Pumps

Compact, economical WOB-L™ pumps for aqueous applications

Manufacturer: welch™  2581B-50

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May be used with buffer solutions but are not recommended for use with acids, bases or organic vapors.

Products in this grouping may have voltages other than the standard US 110/115V. Please review and confirm your selection before completing your order. Some of these products may not be returned.

Catalog No. 01-257-113

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Description & Specifications


Model 2581
Weight (English) 24.5 lb.
Height (English) Exterior 12 in.
For Tube Size (English) 0.25 in.
Width (English) Exterior 8 in.
Includes Liquid trap on inlet, vacuum gauge and adjustment knob, exhaust muffler, suction cup feet and handles for convenient transportation
Certifications/Compliance CE
Electrical Requirements 115V 60Hz
Length (English) 17 in.
Length (Metric) 43.1cm
Shipping Weight (Metric) 14.5kg
Flow Rate 100L/min.
Height (English) 12 in.
For Tube Size (Metric) 0.7cm
Length (English) Exterior 17 in.
Weight (Metric) 11.1kg
Horsepower 0.33hp
Width (English) 7.5 in.
Hertz 60Hz
Height (Metric) 30.5cm
Voltage 115V
Shipping Weight (English) 32 lb.