**Rotary Piston, Compound Vacuum Pump, TECF 60/460

These oil-sealed, compound rotary piston pumps, produce the lowest pressures achievable with mechanical pumps. Two pumping chambers in parallel are backed by a third pumping chamber in series and produce an ultimate pressure 0.2 microns as indicated by a McLeod Gauge (2 x 10-4 Torr). The pumps are simple to operate and require straightforward maintenance without special tools. The moving parts in the triplex pumps are inherently dynamically balanced so that the pumps run smoothly and quietly. The standard vibramounts virtually eliminate vibration transmitted to the floor. Adjustable gas ballast valves can reduce or prevent the contamination of the oil, and can be used to clean oil that has become contaminated with vapors. The gas ballast can also be cracked open to quiet the pump when operating at blank-off. The VP-KTC-60 is air-cooled and oil is circulated by vacuum generated by the pump itself; two solenoid valves control the oil flow. The VP-KTC-112 an oil pump circulates oil through a water-cooled heat exchanger. Solenoid valves and a pressure switch control the oil flow.