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prover, critical-flow

Device utilizing an orifice for testing meters at a pressure of 20 psig or more by passing gas or air through both the meter and orifice and finally discharging it at a lower pressure which maintains critical-flow (sonic velocity) through the orifice. The time for a given quantity of gas to pass through the meter compared to the orifice standard time corrected for test conditions provides a measure of meter accuracy.

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  • ส่วนหนึ่งของคำพูด: noun
  • อุตสาหกรรม/ขอบเขต: Energy
  • Category: Natural gas
  • Company: AGA

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