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原文
1. The main factor is the working fluid in the impurities. These impurities between the sealing elements in the ground, so that the valve leakage. Therefore, the corresponding level of foreign raised the hydraulic components should be used accordingly precision filter. They think the pump sealing elements 5μM, if a filtration accuracy 3/μM filter, the improvement of life than 10 times by 10μM. 2. Hydraulic Valve, the working environment is very bad. In the coal face, tubing length of 1000 meters, up to more than 4,000 joint socket, no special dust-proof tank facilities. Emulsion floating in a large number of impurities, and the valve chamber in the column Bottom, left more coal, rock and iron tablets. Into the liquid core and valve seat, due to open and close more frequently, high flow rate of liquid, sealed soon be invalid. Practice has proved that reduction of pollution of hydraulic system fluid impurities, it is Bellows Seal Valves very difficult, it was envisaged in the emulsion was high pressure pump filter, while a small increase in the entrance of each stent filter. But is blocked at work quickly to form a stop. 3. With the hydraulic support technology development, the use of valve performance and valve life put forward higher requirements. Currently, with 120 mesh filter and under the conditions of magnetic filtration devices, with the valve being tested by the total flow of emulsion and the valve opening and closing times, toCheck Valves measure the life of hydraulic valves. But in fact underground room type test and the actual results of the work vary greatly. Today, many countries in the form of experiments, an increase of anti-pollution requirements, or in emulsion mixed with an appropriate coal, some joined the mechanical impurities.

原文来自：http://www.zhenxingfa.org Hydraulic valve sealing performance analysis of the major factors 是由上海赛泰泵阀有限公司提供的阀门新闻，中文译文仅供参考，以下提供站内导航搜索：中国针型阀网针型阀产品针型阀知识针型阀厂商针型阀博客针型阀行业新闻

译文：
1.主要因素是工作液中的杂质。这些杂质在密封元件间研磨，使阀产生泄漏。因此，国外曾提出相应等级的液压元件，应采用相应精度的过滤器。他们认为5μM的油泵密封元件，如果采用过滤精度为3／μM的过滤器，寿命可比采用呼吸阀10μM的提高10倍。

2.液压支架用阀，工作环境十分恶劣。在采煤工作面，油管总长1000多米，接头插口多达4000多个，液箱无特殊的防尘设施。乳化液中有大量的漂浮杂质，在立柱缸底和阀腔，留有较多的煤粉、岩粒和铁屑。进液阀芯和阀座，由于开启关闭比较频繁，液体流速高，密封很快就会失效。实践证明减少支架液压系统液体的污染杂质，是十分困难的，有人曾经设想在乳化液泵站采用高压过滤器，同时在每台支架进口处增加小型过滤器。但在工作中很快被堵塞，形成断流。

3.随着液压支架技术的发展，对阀的使用性能和阀的使用寿命提出了更高的要求。目前，在装有120目时的过滤器和磁过滤装置的条件下，用通过被测试阀的乳化液的总流量和阀的启闭次数，来计量液压阀的寿命。但实际上室内型式试验与井下实际工作结果相差很大。现在许多国家的形式实验，增加了抗污染要求，有的是在乳化液中掺入适当的减压阀煤粉，有的是加入机械杂质。