A needle valve is a type of valve that is designed to control the flow of fluid in a piping system with high precision. It is typically used in applications where a very precise flow rate is required, such as in laboratory and analytical equipment, gas chromatography, and high-pressure fluid handling systems.
A needle valve is similar in design to a globe valve, but has a much smaller orifice and a longer, tapered point at the end of the valve stem that is used to regulate the flow of fluid. When the valve is turned, the point of the needle moves in and out of the valve seat, allowing for very fine adjustments to the flow of fluid.
Needle valves are available in a variety of materials, including stainless steel, brass, and plastic, and can be designed to withstand high temperatures and pressures. They are typically operated manually.
One of the main advantages of needle valves is their ability to provide very precise control over the flow of fluid. They are also relatively easy to install and maintain, and can be used in a wide range of applications. However, they are not recommended for use in applications where high flow rates are required, as the small orifice can cause significant pressure drops in the system.
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