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Measurement of the differential pressure of liquid metals

  • US 3,902,369 A
  • Filed: 05/02/1974
  • Issued: 09/02/1975
  • Est. Priority Date: 05/02/1974
  • Status: Expired due to Term
First Claim
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1. A system for measuring the differential pressure of a process flowing coolant stream of liquid metals between a high-pressure point and a low-pressure point in said flowing stream comprising a pipe connected between said points, said pipe somewhere in its length accommodating a permanent magnet pump, a variable speed motor coupled to said pump for operating the pump such as to oppose the liquid metal pressure from said stream, an indicating means coupled to said pipe between said pump and said lowpressure point, means for regulating the speed of said motor until said indicating means provides a near-zero reading, and a count rate indicator coupled to said motor to provide an indication of the speed of said motor and when said indicating means reaches said near-zero reading then said motor speed indication thus provides an indication proportional to said differential pressure existing between said points.

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