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但应注意，压火停炉后不应该立即停止循环水泵的运转，应使网络循环水在系统中继续循环一段时间，带锅炉出口水温降到5oC以下时，才能停止循环水泵的运转。因为此时炉膛温度仍然很高，若停泵立即中断系统水循环，对于强制循环的热水锅炉因水循环的停止，锅水将汽化而发生水击或高温受热面过热烧坏。锅炉压火停炉时的注意事项压火停炉期间锅内仍有汽压，故仍须注意监视，并使锅炉保持允许水位；压火停炉时间过6h，应在压火一段时间后关闭锅炉主汽阀，开启过热器出口集箱的疏水阀，以冷却过热器。
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电磁阀4WRE系列力士乐阀象山与角接触球轴承相比、承载能力大，极限转速低。圆锥滚子轴承能够承受一个方向的轴向载荷，能够限制轴或外壳一个方向的轴向位移。为使KOYO轴承充分发挥并长期保持其应有的性能，必须切实做好定期维护保养(定期检查)。通过适当的定期检查，做到早期发现故障，防止事故于未然，对提高生产率和经济性十分重要。清洗将轴承拆下检查时，先用摄影等方法做好外观记录。另外，要确认剩余润滑剂的量并对润滑剂采样，然后再清洗轴承。轴承的清洗分粗洗和精洗进行，并可在使用的容器底部放上金属网架。
