高压容器及高压管道的密封,迄今为止,无论在国内、国外,几乎全是采用金属密封元件。至于用软质的橡胶密封元件确是极为罕见的。十年前,作者曾采用系数m<1(邵氏硬度<75的无织物橡胶)和m=1(邵氏硬度≥75的无织物橡胶)为依据,设计了一种断面形状象燕尾巴的橡胶密封圈,用在国产板式反渗透海水淡化器上。密封直径为255毫米和400毫米,相对压缩量25%,在压力为100公斤/厘米~2,介质为常温海水的情况下操作,获得了良好的密封效果。其结构特点、密封原理以及性能测试结果介绍如下: High pressure vessels and high pressure pipe sealing, so far, both at home and abroad, almost all the use of metal seal components. As with the soft rubber seal is indeed extremely rare. Ten years ago, on the basis of a m = 1 (non-woven rubber with Shore hardness <75) and m = 1 (non-woven rubber with Shore hardness ≥75) Rubber seals, used in domestic plate reverse osmosis desalination. Sealing diameter of 255 mm and 400 mm, the relative compression of 25%, at a pressure of 100 kg / cm ~ 2, the medium is the case of sea water at room temperature operation, access to a good sealing effect. Its structural features, sealing principle and performance test results are described below: