URL details: www.isi-essentials.com/resources/valve-leakage.html
URL title:
控制阀泄漏率和阀座泄漏等级 - bob10
URL description:
Types of valve leakage, valve leakage class, acceptable rates of control valve seat leakage, seat leakage test procedures and comparison of international standards
URL keywords:
valve leakage, Manufacturer's Standardisation Society, MSS, MSS-SP-61, fugitive emissions, API 598, Americam Petroleum Institute, ANSI
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