Welch “WOB-L” 2581 Piston Pump - 115V, 60Hz, 1 Phase.
3.5 CFM, 5 Torr/29.8” HgV
 
Standard duty/general lab piston vacuum pump.  Oil free operation for reduced maintenance.  Has a high water vapor tolerance. 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 
	
Vacuum/Pressure regulator w/gauge, liquid trap at inlet, and outlet silencer.
 
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.