Get current pricing for Edwards, QMB250F/QDP40 Oil-free Pump And Blower Package. Dry Pump Package. Qdp40 Pump And Qmb250f Blower. Displacement: 375 M^3/hr. Water Cooled. 200/460v, 3 Ph, 50/60 Hz, C . Product Category: Lab Equipment, Sub Category: Vacuum Pumps: