Use the design elements library "Valves" to draw building plans, schematic diagrams, blueprints, or technical drawings of industrial piping systems process, vacuum, and fluids piping hydraulics piping air and gas piping materials distribution and liquid transfer systems using the ConceptDraw PRO diagramming and vector drawing software. People in developed nations use valves in their daily lives, including plumbing valves, such as taps for tap water, gas control valves on cookers, small valves fitted to washing machines and dishwashers, safety devices fitted to hot water systems." This is called a check valve, as it prevents or "checks" the flow in one direction. The simplest, and very ancient, valve is simply a freely hinged flap which drops to obstruct fluid (gas or liquid) flow in one direction, but is pushed open by flow in the opposite direction. In an open valve, fluid flows in a direction from higher pressure to lower pressure. Valves are technically valves fittings, but are usually discussed as a separate category. "A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. The vector stencils library "Valves" contains 91 symbols of piping and plumbing valves.
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