保不住，基本上就是高压截止阀发生内漏了。
第三，高压截止阀或者泄压阀坏了，即发生了内泄漏或者外泄露。
Third, high pressure cut-off valve and pressure relief valve is broken, the inside outside leakage or leakage happened.
只要阀门关闭效果良好，保压时，高压截止阀关闭，后端压力容积变小，压力增大。
As long as the valve closure effect is good, when the pressure, high pressure cut-off valve is closed, the back-end pressure volume smaller, pressure.
如果泄压口正常，那么，不接工件，用高压截止阀截断压力，看试验机本身能否保住压力。
If the discharge pressure is normal, so, don't answer the artifacts, cutting with high pressure cut-off valve pressure, see if we can keep pressure testing machine itself.
介绍了一种适应于煤矿井下液压支架使用的高压、大流量、操作力矩小的先导式平面截止阀，并详细介绍了其工作原理、结构和使用性能特点。
A cut-off plane valve applicable for the hydraulic shield in the coal mine is introduced, which has the feature of high pressure, large flux and small handling moment.
这种高压降角截止阀功能提供先进的施工质量和使用寿命长，800类的ANSI。
Advanced construction features of this high pressure drop Angle globe valve provide quality and long service life, Class 800 ANSI.
针对煤矿井下高压、大流量截止阀操作费时费力的实际情况提供了一种新的解决方案。
A new solution has been provided for the real problem of high pressure, and large-flux valve taking much time and energy in the coal mine.
电接点、磁翻板、光控液位控制器、滤清器、充氮车、充气工具、截止阀、高压胶管总成。
Electric contacts, magnetic turnover plate, photo-control liquid level controllers, accumulators, Nitrogen-filling vehicle, gas-filling tools, stop valves and high-pressure rubber tube assembly.
电接点、磁翻板、光控液位控制器、滤清器、充氮车、充气工具、截止阀、高压胶管总成。
Electric contacts, magnetic turnover plate, photo-control liquid level controllers, accumulators, Nitrogen-filling vehicle, gas-filling tools, stop valves and high-pressure rubber tube assembly.
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