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A valve is a device which controls the flow of a fluid like fluidized gases or regular gases, liquids, slurries, by closing, partially obstructing or opening particular passageways. Valves are generally pipe fittings but are commonly discussed as a separate category. In situations where an open valve is concerned, fluid flows in a direction from higher to lower pressure.
Valves are used in various applications like military, industrial, residential, transport and commercial trades. Some of the major industries that rely on valves include the sewerage, oil and gas sectors, mining, chemical manufacturing, power generation and water reticulation.
Most valves being used in everyday activities are plumbing valves, which are used in taps for tap water. Various popular valves include kinds fitted to dishwashers and washing machines, gas control valves on cookers, valves within car engines and safety devices fitted to hot water systems. In nature, veins within the human body act as valves and regulate the blood circulation. Heart valves likewise control the circulation of blood in the chambers of the heart and maintain the proper pumping action.
Valves could be utilized and worked in numerous ways that they can be worked by a lever, a handle or a pedal. Furthermore, valves can be operated automatically or by changes in flow, temperature or pressure. These changes may act upon a piston or a diaphragm which in turn activates the valve. Various popular examples of this particular type of valve are seen on safety valves or boilers fitted to hot water systems.
Valves are utilized in numerous complicated control systems that can need an automatic control that is based on external input. Regulating the flow through the pipe to a changing set point is an example. These situations usually require an actuator. An actuator will stroke the valve depending on its set-up and input, allowing the valve to be positioned accurately while allowing control over several needs.
