Piston prover apparatus, method and system
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United States of America Patent
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Aug 20, 2013
Grant Date -
May 2, 2013
app pub date -
Oct 31, 2011
filing date -
Oct 31, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A piston prover apparatus, method and system for accurately measuring the flow rate of a fluid by the measurement of the position of an internal piston. The piston can be integrated with a poppet valve arrangement located within a cylinder in order to permit fluid (e.g., cryogenic fluid) to pass through an orifice passage when the piston is drawn to an upstream position prior to proving the flow. An actuator in association with a motor and an encoder can be located inside the cylinder. The motor drives the piston to the upstream position of the cylinder when a proving run is initiated. Once the piston is released for the proving run, the initial and final positions of the piston can be accurately measured along with the transit time.
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