Breathing circuit component for breathing apparatus

In one embodiment, a breathing circuit component is provided, the breathing circuit component comprising: an inlet; an outlet; and an enclosure wall defining a gas passage between the inlet and the outlet, at least one region of the wall including a diaphragm that allows passage of water vapor and substantially does not allow passage of liquid water and breathing gas, where the diaphragm has a thickness of about 35 microns to 45 microns. 在一个实施例中，提供了一种呼吸回路部件，该呼吸回路部件包括：入口；出口；以及限定该入口与该出口之间的气体通道的围合壁，该壁的至少一个区包括允许水蒸气通过而基本上不允许液态水和呼吸气体通过的隔膜，其中所述隔膜的厚度为约35微米至45微米。