发明名称 Check valve testing system
摘要 A method and apparatus for testing the operating condition of a check valve directs sound waves into the valve chamber of a check valve assembly and utilizes the collected signals of the reflected sound waves to generate various time lapse data corresponding to the valve disk position and movement, such time lapse data providing an analysis of the condition of the valve assembly.
申请公布号 US4977778(A) 申请公布日期 1990.12.18
申请号 US19900467911 申请日期 1990.01.22
申请人 MOVATS INCORPORATED 发明人 NAFZIGER, STEVEN;MCMENNAMY, JOHN A.
分类号 F16K37/00;G01S15/08;G01S15/88 主分类号 F16K37/00
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