工业过程控制阀 - 第3-1部分:尺寸 - 法兰式 双向 球形 直型和面对面尺寸 用于法兰式 双向 球形 角度图案控制阀

[中文适用范围]： 本部分IEC 60534规定了法兰连接、双通路、直行程（直线型）和角行程（角型）控制阀的给定公称尺寸和压力等级的面对面（FTF）和中心到端面（CTF）尺寸。包括的公称尺寸范围为：直行程控制阀为DN 15至DN 400，角行程控制阀为DN 15至DN 400。 [外文原描述]： IEC 60534-3-1:2019 specifies face-to-face (FTF) and centre-to-face (CTF) dimensions for given nominal sizes and pressure ratings of flanged, two-way, globe-type, straight pattern and angle pattern control valves This second edition cancels and replaces the first edition published in 2000. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) This standard has been extended to cover face-to-face dimensions and centre-to-face dimensions for control valves PN 160 and PN 250 (Class 900 and 1500) b) Definitions of end-to-end dimensions and centre-to-end dimensions have been added for valves with flange facings where the gasket contact surfaces are not located at the extreme ends of the valve c) Table 5 of adjustment value "X" for end-to-end dimensions of straight pattern valves with ring joint ends has been added d) ANSI/ISA references have been added in Tables 1 to 4 e) ANSI/ISA references have been added in the bibliography