what are diaphragm valves used for?
 High-Flow, Springless Diaphragm Valves DF series diaphragm valves are designed for a wide range of ultrahigh-purity, high-flow applications.It is used in industrial applications,in the bio-pharmaceutical industry,to handle more fluids, gases, solids, and powder than any other type of valve.Diaphragm valves are used on shut-off and throttling service for liquids, slurries and vacuum/gas.Valves are used to control flow for liquids, gases, or other mixtures. Diaphragm valves use air or another fluid to press a diaphragm against the bottom of the valve which shuts off flow. 