Welch “WOB-L” 2511 Piston Pump - 115V, 60Hz, 1 Phase.

.39 CFM, 219 Torr/21.3”HgV


Standard duty/general lab piston vacuum pump.  Oil free operation for reduced maintenance.  Has a high water vapor tolerance. Wide flow range with moderate vacuum/pressure of 5 Torr/29.72” HgV.


Built for durability, reliability, long service life, portability. Known for general lab use, wide range of flow rates, and moderate vacuum. 


  • Oil free operation
  • Low maintenance requirement and cost of ownership with longer life span
  • Small footprint and portable
  • Applications: Filtration, Aspiration, Vacuum Oven.


Additional diaphragm materials available to handle a range of chemical vapors. 

Additional motor options available.

Additional accessories available for inlet, exhaust, or application.

Complete package systems available.

Welch “WOB-L” 2511 Piston Pump

SKU: 2511B-01
$373.00 Regular Price
$328.24Sale Price