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閥門軟密封和硬密封區別

返回列表 文章出處：來源：发布日期：2018.05.10 15:00:00 浏覽次數：

閥門軟密封和硬密封區別：該如何選擇？

（1）軟密封
    除耐腐蚀的衬里閥門外，一般的軟密封阀指阀芯或阀座两者之一采用非金属材料（主要为聚四氟乙烯，还有橡胶等）的密封形式的阀。軟密封阀密封效果最佳，但在管道安装、系统的清洗中都有可能留下或多或少不干净的杂物（如焊渣、铁屑等），它们流经调节阀时，容易把軟密封阀座或阀芯划伤，使泄漏量增加，密封的可靠性差。所以，选择軟密封结构必须考虑介质的清洁和投运前严格冲洗管道。
    （2）硬密封
    硬密封再堆焊耐磨合金等是切断阀的最佳选择。这种方式在考虑密封性的同时也考虑了使用寿命和可靠性，虽然出厂指标只有10－6～10－8，达不到軟密封零泄漏的效果，但足以满足严密切断的要求，而且它经久耐用，从经济的角度考虑更合算。

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