在这个图中，阀门处于关闭状态，阀座是在保护状态下处于阀座密封位置内。管道流体介质为黄色，清洗/冲刷流体介质关闭。
In this picture, the valve is in the closed, seated
position with the seats protected. The line media is shaded yellow and
the purge/flush media is colored.
对于这种阀门，我们具有三种密封元件：
With the valve, we have three sealing elements:
- 靠在阀体上的阀塞机械密封为上游第一道密封。
The upstream primary mechanical seal of the plug
against the body.
- 内部静态清洗，也就是，蒸汽密封。
The internal static purge, i.e., steam seal.
- 靠在阀体上的阀塞机械密封为下游第二道密封。
The downstream secondary mechanical seal of the
plug against the body.
|
|
阀塞轻微提升(大约1/4英寸或1/2英寸)，在阀座区域的管路流体产生高速冲刷作用。
The plug is slightly lifted (approximately 1/4
to 1/2 inch) causing a high velocity flushing action of the line media
from the seat areas.
当阀塞离开阀座位置时，被压缩的清洗流体介质变成冲刷流体介质，实现冲刷作用。
The flushing action is achieved as the compressed
purge media is released to become the flush media when the plug unseats.
当阀门在开启和关闭位置之间旋转90度时，固体颗粒将被冲刷回到生产工艺液流中。
As the valve rotates 90 degrees between open and
closed, the particulate matter is flushed back into the process.
提升阀塞的其他优点是循环操作阀门所要求的低摩擦和低扭矩。
The additional benefit of lifting the plug is
the low friction and low torque required to cycle the valve.
|
当阀塞旋转时，冲刷流体通过两个清洗/冲刷进管连续进行。
As the plug rotates, the flush is continuously
fed through the two purge/flush feed lines.
两点注意事项：
Two points to note:
- 除非阀门在维护或从管路上拆卸下来，否则不能关闭清洗/冲刷管路。
The purge/flush lines should never be turned off
unless the valve is to be maintained or removed from the line.
- 在确定蒸汽歧管(假定所选择的清洗/冲刷流体是蒸汽)时要小心谨慎，同样重要的还包括蒸汽管路的保管和保温。
Careful sizing of the steam manifold (assuming
that steam is the purge/flush medium of choice) is critical as well
as the trapping and insulation of the steam lines.
|
|
阀塞在开启状态下位于阀座内，此时阀座再一次处于保护状态。
The plug is seated in the open position with the
seats once again protected.
阀塞的阀座密封自动停止冲刷过程，恢复清洗过程，产生清洗密封或屏障。
Seating of the plug automatically stops the flushing
process and the purging is resumed, creating a purge seal or barrier.
|
