Forklift Steering Valve - A valve is a device which regulates the flow of a fluid like for instance slurries, fluidized gases or regular gases, liquids, by closing, partially obstructing or opening some passageways. Valves are normally pipe fittings but are commonly discussed as a separate category. In instances where an open valve is concerned, fluid flows in a direction from higher to lower pressure.
Various applications like commercial, military, industrial, residential and transport trades make use of valves. A few of the main trades which depend on valves comprise the oil and gas sector, mining, chemical manufacturing, power generation, water reticulation and sewerage.
Most valves being used in daily activities are plumbing valves, that are utilized in taps for tap water. Several popular valves comprise 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 in the human body act as valves and control the blood flow. Heart valves also regulate the circulation of blood in the chambers of the heart and maintain the correct pumping action.
Valves can be used and operated in many ways that they could be worked by a pedal, a lever or a handle. Also, valves could be driven automatically or by changes in temperature, pressure or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve. Various popular examples of this particular kind of valve are found on boilers or safety valves fitted to hot water systems.
There are more complicated control systems using valves that need automatic control which is based on external input. For example, controlling flow through a pipe to a changing set point. These circumstances normally require an actuator. An actuator would stroke the valve depending on its set-up and input, which allows the valve to be situated precisely while allowing control over different requirements.
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