进口疏水阀或称进口疏水器是用于蒸汽管网及设备中，能自动排出凝结水、空气及其它不凝结气体，并阻水蒸汽泄漏的阀门。
Import import trap or trap is known for the steam pipe network and devices, can automatically discharge condensate, air and other non-condensing gas, and blocking water vapor leak valve.
美国进口膜盒式蒸汽疏水阀的主要动作元件是金属膜盒，内充一种气化温度比水的饱和温度低的液体。
The main acting unit of bellows trap is metal bellows, which is filled with a type of liquid with gasification temperature lower than water's saturation temperature.
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