新闻德国原厂Birkenbeul 6APE80M-4厂家进口
同时，还要检查差压变送器和压力变送器导压管线保温情况，检查保温箱保温情况。差压变送器和压力变送器导压管内物料由于处在静止状态，有时除保温以外尚需伴热，伴热有电伴热和蒸汽伴热。对于电伴热应检查电源电压，保证正常运行。蒸汽伴热是化工企业常见的伴热形式，对于蒸汽伴热，由于冬天气温变化很大，温差可达2℃左右，仪表工应根据气温变化调节伴热蒸汽流量。蒸汽流量大小可通过观察伴热蒸汽管疏水器排汽状况决定，疏水器连续排汽说明蒸汽流量过大，很长时间不排汽说明蒸汽流量太小。
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新闻德国原厂Birkenbeul 6APE80M-4厂家进口
但干燥搜术的这些特点往往被人有意或无意地忽视。制造厂商由于实验装置缺乏或机型不全（这在我国是一个普遍存在的现象）经常回避应做的干燥实验，而用户由于不了解干燥技术的特点，也经常放弃进行必要实验的要求。其结局是装置使用效果不佳，甚至于造成方案设计失败。在我国，这样的事例屡见不鲜，曾有过一套价值2万元人民币的工业干燥装置因达不到使用要求而被闲置的教训。建设工业干燥装置尤其是较大的装置之前，一定要进行充分的、有说服力的实验，并以实验结果作为工业装置设计的依据。
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新闻德国原厂Birkenbeul 6APE80M-4厂家进口
具体办法是将在振动开度范围内阀芯曲面车削.5～1.mm。如某厂家属区附近安装了一台自力式压力调节阀，因共振产生啸叫影响职工休息，我们将阀芯曲面车掉.5mm后，共振啸叫声消失。更换节流件消除共振法其方法有：更换流量特性，对数改线性，线性改对数；更换阀芯形式。如将轴塞形改为“V”形槽阀芯，将双座阀轴塞型改成套筒型；将开窗口的套筒改为打小孔的套筒等。如某氮肥厂一台DN25双座阀，阀杆与阀芯连接处经常振断，我们确认为共振后，将直线特性阀芯改为对数性阀芯，问题得到解决。
