Disc interference may result when valves are installed in pipelines having smaller than normal inside diameters, such as heavy wall pipe, plastic lined pipe, or as cast flanges.

如果管道的内公称通径比较小,如管闭太厚,塑料管道或铸铁法兰等,这时安装在这种管道上的阀门的蝶板的运动就可能会收到阻碍。

属类：产品说明书-热水器说明-

Suitable corrective measures must be taken to remove these obstructions, such as taper boring the pipe or installing a spacer.

这是就要进行必要的矫正,例如对管道口进行锥形切削,或安装隔离垫圈,以消除这些障碍。

属类：产品说明书-热水器说明-

Interference may also occur when butterfly valves are bolted directly to the outlet flange of a swing check, silent check, or reducing flange.

如果用螺栓直接把蝶阀连接在平旋阀、无声止回阀的法兰出口上,或者直接连接在减压阀的法兰上,都可能会发生蝶扳受阻现象。

属类：产品说明书-热水器说明-

Check valve and butterfly valve combinations are very popular; normally a short spool piece is required between the valves.

止回阀与蝶阀的连接是经常发生的事,通常需要在这两种阀门之间加上一节短短的阀槽。

属类：产品说明书-热水器说明-

Class 250 cast iron and Class 300 steel flanges can not be used on these valves.

在这些阀门上不能使用250磅级铸铁和300磅级钢法兰。

属类：产品说明书-热水器说明-

Rubber faced or mechanical flanges are not recommended.

建议不要使用橡胶表面或机械法兰。

属类：产品说明书-热水器说明-

This valve is not recommended for steam service.

建议不要在蒸气管道系统中使用这种阀门。

属类：产品说明书-热水器说明-

Valves should not be assembled to the flanges and then welded into the piping system.

不要把组装上法兰的阀门焊接到管道系统上。

属类：产品说明书-热水器说明-

"Lever-lock handles are not recommended for use on 8"" and larger valves."

建议不要在公称通径大于8英寸的阀门上使用杠杆固定锁手柄。

属类：产品说明书-热水器说明-

Do not install EPDM liner in compressed air lines.

不要在压缩空气管道内安装EPDM衬垫。

属类：产品说明书-热水器说明-