Two o - rings in gland follower provide additional stem seal protection to assure tightness of less than 1 ppm 密封压盖随动件内的两个o形环为阀杆提供更加安全的密封保护，以确保泄漏率不会超过百万分之一。
The result plots of leakage rate versus acoustic amplitude are the primary basis to determine the feasibility for quantifying leakage rate 并绘制了声发射特征值与泄漏率的相关性曲线，为声发射定量评价泄漏率提供重要依据。
The mathematics model is based on the relation of sources characteristic parameters and leakage rate in order to estimate leakage rate 研究不同类型阀门内漏声源特征参量与阀门泄漏率的关系，建立阀门泄漏率定量评价的数学模型。
Limiting enclosures . method of control of the leak rate per hour . enclosures of classes 1 and 2 . method of measurement of the increase of the oxygen titre in volume 安全壳.时泄漏率检验方法.级和级安全壳.提高氧容积浓度的测量方法
Test method for determining the rate of air leakage through exterior windows , curtain walls , and doors under specified pressure and temperature differences across the specimen 在试验样件规定压力和温差下测定通过外窗幕墙和门空气泄漏率的试验方法
Standard test method for determining the rate of air leakage through exterior windows , curtain walls , and doors under specified pressure and temperature differences across the specimen 在试样两侧特定压力和温度差下透过外窗,护墙和门的空气泄漏率的测定方法
It makes the application , maintenance and replacing of valves scientific and the valves management more normally . moreover , it could estimate valve leakage rate on basis of the analysis of testing data 该软件不仅能够实现石油、石化企业阀门使用、维护和更换的科学化和规范化，而且通过对阀门内漏声学检测数据的分析，实现对阀门泄漏率的定量评价。
Best test regions are confirmed to found the acoustic emission test method for valve leakage . the large amount of data collected also allowed a brief investigation of the effects of different opening , valve types , differential pressure and leakage rates 根据本次研究工作的目的和特点并结合现场的实际情况，探讨了内漏时阀门开度、阀门类型、两侧压差以及泄漏率等因素变化时的声学特性。
The study instructs simulating valve leakage experiment , perfects valves leakage test technology and bases theoretically for applying valve leakage test in practice . the test stand is constructed and instrumented to accept a variety of valves in order to determine which characteristics of acoustic emission change with leakage rate . the data for each valve type is generated by varying valve type and working medium 建立模拟在用承压阀门内漏实验台，研究典型阀门内漏声源的声学特性，确定声发射特征参量与泄漏率的关系，为定量评价阀门泄漏率提供实验数据；通过对不同类型、不同规格、不同工作介质下的典型承压阀门内漏的实验研究，确定阀门内漏最佳检测区域，建立在用承压阀门内漏声学检测方法。
