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2. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   The inlet pressure gauge will indicate this pressure. The gas then passes through the normally open pressure control valve orifice and the downstream pressure rises until the valve actuating diaphragm is deflected sufficiently to close the valve, preventing any more gas from entering the low pressure side until the pressure drops again.

3. Pressure measurement - Wikipedia

   en.wikipedia.org/wiki/Pressure_measurement

   Natural gas pressure gauge silicon piezoresistive pressure sensors. Everyday pressure measurements, such as for vehicle tire pressure, are usually made relative to ambient air pressure. In other cases measurements are made relative to a vacuum or to some other specific reference.

4. Cascade filling system - Wikipedia

   en.wikipedia.org/wiki/Cascade_filling_system

   A cascade filling system is a high-pressure gas cylinder storage system that is used for the refilling of smaller compressed gas cylinders. [1] [2] In some applications, each of the large cylinders is filled by a compressor, otherwise they may be filled remotely and replaced when the pressure is too low for effective transfer. The cascade ...

5. Gas meter - Wikipedia

   en.wikipedia.org/wiki/Gas_meter

   A gas meter is a specialized flow meter, used to measure the volume of fuel gases such as natural gas and liquefied petroleum gas. Gas meters are used at residential, commercial, and industrial buildings that consume fuel gas supplied by a gas utility. Gases are more difficult to measure than liquids, because measured volumes are highly ...

6. Pigging - Wikipedia

   en.wikipedia.org/wiki/Pigging

   The pigging installation shown (right) is known as an Above Ground Installation (AGI). It is part of the UK's National Transmission System for natural gas. It shows two pig launcher/ receivers at the end of two 610-millimetre (24 in) diameter pipelines that carry gas under the River Thames, between East Tilbury in Essex and Shorne in Kent.

7. Permanent downhole gauge - Wikipedia

   en.wikipedia.org/wiki/Permanent_Downhole_Gauge

   A permanent downhole gauge (PDG) is a pressure and/or temperature gauge permanently installed in an oil or gas well. [1] These gauges are typically installed in the tubing in the well and can measure the tubing pressure, annulus pressure, or both. Systems installed in well casing to read formation pressure directly, suspended systems, and ...