Vacuubrand MZ-2C Diaphragm Vacuum Pump. A two head diaphragm vacuum pump for the lab. Used for continuous, oil-free evacuation and pumping of gases. All contacting parts made of aluminum and selected plastics, allows a wide range of applications for non corrosive gases. Flow rate: 1.7 m3/hr. Vacuum Head 1: 100 mBar. Vacuum Head 2: 100 mBar. Vacuum Together: 40 mBar.