Vooner VG and V4 Series Vacuum Pumps are single stage liquid sealed, non-pulsating, rotary devices. The pumps are equipped with two conical ports and a one piece enclosed rotor, dynamically balanced, and keyed to the shaft. The rotor has a shroud in the center and the rotor housing has a rib in the center effectively providing two separate pumps with an inlet and discharge port located in each end head. The end heads are independently bolted to the rotor housing - no tie rods are used. A self-aligning removable bearing carrier bolts to each head. Shaft sealing is provided by braided packing with two-piece cast 316 stainless steel packing glands, studs and nuts.