2042B-01 Mech Pumps Overview Welch Dry Pumps Product Detail (Click to Enlarge) Overview Dry Diaphragm Pump, Welch 2042, Chemical Resistant dry diaphragm vacuum pump. PTFE contact surfaces, 1.2 CFM, 2.0 Torr base pressure. 115V 60HZ Order Part $4,020.00 USD per Unit Quantity View Cart