A disposable non-woolen filter, and a panel type washable coarse aluminum filter are installed in the front panel of return air duct of each room, to trap powder generated, if any.
在每个房间回风管的前面板上安装有一台一次性的非毛织品过滤器，以及一台板式可洗粗铝过滤器，以捕捉收集可能产生的任何粉尘。
A check valve should be installed on return piping if there will be a pressurized return line or the trap drains to an overhead return line (Fig. B).
如果存在一个压力回路，或者疏水阀排放口位于回路管道的上方，则应该安装一个止回阀(图b)。
The trap remains closed until the steam cools and condenses into water. The bellows retracts to allow the water into the return piping.
疏水阀处于关闭状态，直到蒸汽足够冷却到凝结为凝结水。这时膜盒重新回缩并让水流进回路管道。
The trap remains closed until the steam cools and condenses into water. The bellows retracts to allow the water into the return piping.
疏水阀处于关闭状态，直到蒸汽足够冷却到凝结为凝结水。这时膜盒重新回缩并让水流进回路管道。
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