... 蒸汽锅炉(工业锅炉)：steam-raising boiler 蒸汽管线疏水：steam passage drain 蒸汽管膨胀圈：steam pipe expansion loop ...
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When the water level of condensate in the drain sump drops, the cup to shut the admission pipe falls down, the passage for steam to enter into the valve body is opened.
由于通往阀腔的进汽管被密封，凝结水从集水仓流经进水管进入阀腔，倒吊桶下沉，打开排水阀嘴，周期性的开始排水。
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