A Gauge Valve is designed for isolating the attached instrument for protection or removal.  Needle valves provide reliable function to throttle, regulate and isolate gasses and liquids. The added function of the port is to provide connection access for service, calibration, sampling, purging, or a host of other tasks, all of which can be completed while the process remains in operation. Sometimes two of the ports will be plugged and the instrument or gauge connected to the port providing the most convenient or functional orientation of the connected gauge or the valve handle. This valve can also enable a wide variety of applications through connection of additional instruments, gauges, valves, or other equipment.

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