NEW-WELCH-CRV2 Mech Pumps Overview Edwards, Welch® and Navac Product Detail (Click to Enlarge) Overview New Welch CRVpro 2 Mechanical Direct Drive Pump, 50 L/M, 1.8 CFM, 2 Stage, Single Phase, 120/230 VAC. Order Part $3,060.00 USD per Unit Quantity View Cart