订购这套重要的阀座泄漏装置，并保存在FCI 70-2-2013和70-3-2015FCI 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 70-3-2015: 本标准适用于先导式和直接作用式减压、减压（背压）、差压和温度调节器。泄漏等级的选择不受调节器设计的限制，但根据第4节，针对每种等级，建议各种商用设计的可接受值。本标准不能用作在规定条件以外的条件下预测泄漏的依据。本标准类似于FCI 70-2。本标准不适用于以下标准中定义的压力调节器:-ANSI Z21。18/CSA 6.3-ANSI Z21。80/CSA 6.22-ANSI Z21。78/CSA 6.20

Order this important seat leakage set and save on FCI 70-2-2013 and 70-3-2015FCI 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 70-3-2015:This standard applies to pilot operated and direct acting pressure reducing, pressure relieving (back pressure), differential pressure and temperature regulators.Selection of a leakage class is not restricted as to regulator design, but acceptable values for various commercially available designs are suggested for each class under Section 4.The standard cannot be used as a basis for predicting leakage at conditions other than those specified.This standard is similar to FCI 70-2.This standard does not apply to pressure regulators as defined in the following standards:- ANSI Z21.18/CSA 6.3- ANSI Z21.80/CSA 6.22- ANSI Z21.78/CSA 6.20