订购这套重要的阀座泄漏装置，并保存在FCI 70-2-2013和70-3-2016FCI 70-2-2013上:本标准规定了控制阀的六类阀座泄漏。还定义了确定适当等级的具体试验程序。包括通常与带有活塞环密封或金属对金属阀座的双端口、双座或平衡单端口控制阀相关的类别；商用不平衡单端口、单座和平衡单端口阀门，带有超紧活塞环或其他密封方式以及金属对金属阀座；用于关键应用的阀门，其中可能需要长时间关闭控制阀，而无需关闭截止阀； 和弹性阀座控制阀 带有O形圈或类似无间隙密封件等。FCI 70-3-2016:本标准适用于先导操作和直接作用减压、减压（背压）、差压和温度调节器。自2001年制定标准以来，FCI定期更新该标准。应行业要求，FCI最近更新了该标准，将VIII类标准包括在内，这是一种“不允许泄漏”或“气密”标准，通常与弹性阀座调节器相关，或与“O”形环或其他无间隙密封平衡或不平衡。

Order this important seat leakage set and save on FCI 70-2-2013 and 70-3-2016FCI 70-2-2013:This standard establishes six classes of seat leakage for control valves. Also defined are specific test procedures to determine the appropriate class. Included are classes commonly associated with double-port, double-seat or balanced single-port control valves with a piston ring seal or metal-to-metal seats; commercial unbalanced single-port, single-seat and balanced single-port valves with extra tight piston rings or other sealing means and metal-to-metal seats; valves for critical applications where the control valve may be required to be closed, without a blocking valve, for long period of time; and resilient seating control valves with "O" rings or similar gapless seals, among others.FCI 70-3-2016:The standard applies to pilot operated and direct acting pressure reducing, pressure relieving (back pressure), differential pressure and temperature regulators. The FCI has periodically updated the standard since the standard's development in 2001.Responding to the industry's request, the FCI has recently updated the standard to include Class VIII, which is a "no permissible leakage" or "bubble tight" standard generally associated with resilient seating regulators either balanced or unbalanced with "O" rings or other gapless seals.