ADI’s complete line of Dia-Vac® diaphragm vacuum pumps offers 100% oil-free, contamination free, corrosion resistant, and leak free sampling. With the corrosion resistant diaphragm pumps, no oil, graphite or other potentially contaminating lubricants will come in contact with the gaseous stream. The reliable Dia-Vac® pumps are exceptionally quiet at all pressures and in most applications they can be operated for extended periods without the need for maintenance.