Four-stage chemistry-design diaphragm pump for continuous, oil-free pumping of corrosive gases and vapors. The four-stage construction of the eight-cylinder pump MV 10C provides the advantageous combination of high pumping speed and very low ultimate vacuum of 0.9 mbar. All internal parts in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven PTFE sandwich diaphragms increase reliability and extend operating life. The integrated exhaust vapor condenser on the PC 8 unit built around the MV 10C offers near-100-percent solvent recovery.