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Piston Pumps WOB-L® 2561

Item# 2561B-50

The Welch Piston Pump WOB-L 2561 combines advanced technology with durable construction for consistent vacuum performance. Learn more about WOB-L Piston Pumps on our category page.

Delivery time will be confirmed in the order

The WOB-L® 2561 dry piston pump is ideal for pumping water vapor, and for vacuum ovens and gas sampling applications with vacuum requirements above 10 mbar. The pump provides continuous, reliable, high flow vacuum. It is light, compact, and its oil-free operation reduces maintenance. Pump comes with inlet liquid trap, a mounted vacuum gauge and vacuum regulator.

Note: pump is not recommended for pumping organic, acidic and basic vapors.

    Article Number

    U2561C-50

    Max. pumping speed at 50 Hz in m³/h (l/min)

    3.3 (55)

    Max pumping speed at 60 Hz in m³/h (l/min)

    4 (66)

    Max. pumping speed at 60 Hz in cfm (l/min)

    2.3 (66)

    Ultimate pressure in mbar (Torr)

    10 (7.5)

    Wired for

    230V, 50Hz

    Dimensions (W/D/H) in mm

    439/165/267

    Weight kg (lbs)

    7.4 (16.3)

    *Without handle

    • Hydrophobic in-line filter and hose DN 6 / DN 8 - 404008
    • Maintenance Kit for WOB-L® 2561 - U2563K-03
    • Seal Kit for WOB-L® 2561, 2567 - U2567K-04
    • Vacuum regulator for WOB-L® 2561, 2563, 2567 - U2565K-50
    • Post-Pump Protection - Exhaust Silencer for WOB-L® 2561 - U1412D
    • Replacement container (Glas) for WOB-L® 2561, 2567, 2581, 2585 - U1415B
    • Connection-Kit 5 for Vacuum oven - 404005
    • Connection-Kit 6 - 404006