Vacuum Filtration Pump, Oil-Free, PTFE Head. Compact vacuum filtration pumps designed for sample preparation in chemistry, microbiology, waste water control and other analytical processes. Thediaphragm pumps offer a compact, high performance and easy-to-use solution which is perfect for both single and multiple filtrations. The functional, space-saving and innovative design with readily accessible, top mounted power switch ensures convenient and quick operation. Both models feature robust PTFE diaphragms and valves for excellent corrosion resistance in routine biology and chemistry lab applications. The -03 incorporates a PTFE head to provide a full fluoropolymer flow path for maximum chemical resistance in the most challenging applications. Thesepumps offer whisper-quiet operation, low vibration, and long service intervals: 10,000-15,000 operating hours in most applications. Ultimate Vacuum: 75 Torr (100mbar). Free Air Capacity: 14 lpm (0.5cfm).