improved performance, increased pumping speed and lower ultimate vacuum extend applications in both the laboratory and in industrial applications. Long-life diaphragm with PTFE sandwich construction and unstressed diaphragm support. Easy service/exchange of diaphragm or valves due to novel integrated valve head assembly. Easy dismantling, cleaning and reassembly without requiring readjustment. Whisper quiet and ultra low vibration due to compact drive with patented motor control system. Ideal as a built-in component for sensitive equipment in both the laboratory and in industry. Superior vapour tolerance due to integral tubing connections and gas ballast valve for continuous purge (at ME 16C NT, MZ 2C NT, MD 4C / 12C NT and MV 10C NT). Easy to clean due to smooth exterior surfaces. The VARIO® design provides vacuum control by precise and continuous adaptation of the diaphragm pump·s motor speed, and includes the VARIO® pump, as well as the CVC 3000 vacuum controller.