A valve is a device that regulates, directs or controls the flow of fluid- gases, liquids, fluidized solids by opening, closing, or partially obstructing various passageways. Valves are technically valves fittings. Valves have many uses, including controlling water for irrigation, industrial uses for controlling processes, residential uses such as on / off & pressure control to dish and clothes washers & taps in the home. Valves are also used in military & transport sectors. Valves are found in water & sewage processing, mining, power generation, processing of oil, gas & petroleum, food manufacturing, chemical & plastic manufacturing and many other fields.
Valves include plumbing valves, such as taps, gas control valves on cookers, small valves fitted to washing machines and dishwashers.