METAL SEAT BALL VALVE APPARATUS PROVIDED WITH MICRO-ALLOYING LAYER, AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Feb 7, 2019
app pub date -
Sep 26, 2017
filing date -
Aug 7, 2017
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Abstract
Disclosed are a metal seat ball valve apparatus provided with a micro-alloying layer and a method for manufacturing the same. The metal seat ball valve apparatus ensures that a ball valve performs a precise trouble-free smooth operation in diverse environments, such as ultralow temperature, high temperature, and high pressure.
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