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A mass flow controller is designed and calibrated to control a specific type of liquid or gas at a particular range of flow rates. The MFC can be given a setpoint from 0 to 100% of its full scale range but is typically operated in the 10 to 90% of full scale where the best accuracy is achieved.
Constant flow blending – a controlled flow of the constituent gases is mixed to form the product. Blending may occur at ambient pressure or at a pressure setting above ambient but lower than supply gas pressures. Constant mass flow supply: Precision mass flow controllers are used to control the flow rate of each gas for blending.
FCI operates a NIST flow calibration laboratory with 19 precision flow stands. FCI utilizes these precision flow stands to flow actual gases and reference fluids matched to the temperature, process conditions, and line size of individual customers' flow meter applications. The company has subsidiaries in Tilburg, Netherlands and Beijing, China.
The anti-surge controller (FIC) modulates a control valve (FCV) which recycles cooled gas from downstream of the compressor after-cooler back to the suction of the compressor. Low flow alarms (FAL) provide a warning indication to operating personnel. [10] Schematic of pump minimum flow protection arrangement
Thermal mass flow meters, also known as thermal dispersion or immersible mass flow meters, comprise a family of instruments for the measurement of the total mass flow rate of a fluid, primarily gases, flowing through closed conduits. A second type is the capillary-tube type of thermal mass flow meter.
As earlier stated, flow instruments that function with the separator in an oil and gas environment include the flow indicator, flow transmitter and the flow controller. Due to maintenance (which will be discussed later) or due to high usage, these flowmeters do need to be calibrated from time to time. [13]
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