April 17, 2025

This paper introduces the valve leakage class standard and the principle and method of gas tightness testing, emphasizing its importance. Valve leakage class is divided into different levels, the detection method includes sealing test and shell test. Precision Engineering recommends a variety of airtightness testing instruments, such as pressure decay method, negative vacuum method and flow method testers, and provides customized solutions to help companies improve testing efficiency and quality.