概述：主要连接、结构尺寸DN（mm）尺寸（mm）UA41SM-16（C） UA41H-16C、P、R1520253240506580100125150200250300350400L130150160180200230290310350400480485622698787914H1701902002302602803003504004205105907108309501080W100100120146160180200240270310340400520640760900D95105115135145160180195215245280335405460520580K657585100100125145160180210240295355410470525D14555657885100120135155185210265320375435485t12121213131315171719212327283032n-φ4-144-144-144-184-184-184-188-188-188-188-2312-2312-2512-2516-2516-30?DN（mm）尺寸（mm）UA41SM-25（C） UA41H-25C、P、R1520253240506580100125150200250300350400L130150160180200230290310350400480600622711838914H1701902102402402703003504004405105907108309501080W100100110140160180200240270310330400520640760900D95105115135145160180195230270300360425485550610K657585100110125145160190220250310370430490550D14555657885100125135160188218278332390448505t14141415151719192125273133364044n-φ4-144-144-144-184-184-188-188-188-238-258-2512-2512-3016-3016-3416-34使用在石油、化工、化肥等长输管线系统中时，绝大部份时间是在室外使用而往往又是常开式，这样相当长的一段车光螺纹的阀杆裸露出来，造成风沙侵蚀，容易损坏，而暗杆柱塞阀阀杆永远处于阀内，保护了阀杆不增加阀门高度，安装于操作窨小的地方极为有利。?