原文：

The glitch appeared the Tuesday evening, as technicians filled the shuttle's external tank with liquid hydrogen and liquid oxygen. The valve in question governs filling and draining of the tank holding liquid hydrogen. It's role is critical enough to require a scrub if it appears to be malfunctioning.
The valve problem cropped up as technicians were moving into the final stages of filling the shuttle's external tank. The valve was supposed to close, but engineers received no direct confirmation that it had shut from sensors designed to alert them to the valve's status.
During Tuesday evening's fill up, the launch team received other, less direct, evidence that the valve had shut, says Mike Moses, who heads the prelaunch mission management team. That suggested that the problem involved the sensors and not the valve itself.
Depending on the diagnosis engineers develop, Discovery could launch at 12:22 a.m. Eastern time Friday, with a second attempt possible some 23 hours later. Weather forecasters are now watching tropical storm Danny to see if it could lead to weather-related delays. If those two opportunities are scrubbed, NASA can launch Aug. 30. After that, other launch schedules for Cape Canaveral as well as Russian and Japanese cargo traffic around the space station would push
a launch to mid-October.
Moreover, if the sensors are the problem, managers could still scratch the launch this weekend if they are too uncomfortable with the prospect of relying on indirect evidence that the valve is behaving properly. The mission management team could opt to stand down for repairs.


原文来自：  http://www.csmonitor.com/USA/2009/0826/p02s05-usgn.html

Fuel valve busted? Shuttle can't leave until NASA knows..;是由 提供的阀门新闻，中文译文仅供参考(上海日美阀门制造有限公司还生产





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以下是参考译文：

译文：传感器本身的阀门

该故障出现在星期二晚上，技术人员填补了航天飞机的液态氢和液态氧外部燃料箱。有问题的执政阀灌装和坦克的液态氢排水举行。它的作用是至关重要的，足以需要擦洗，如果它似乎出现故障。
阀门出现了问题，作为技术人员将填补航天飞机的外部燃料箱的{zh1}阶段前进。本来阀门关闭，但没有收到任何直接的工程师证实，它已经从旨在提醒他们阀门关闭状态传感器。
实际上有两种管道沿线的这些阀门导致的氢气罐 - 1了其他阀门背。如果不关闭在填补结束，第二个将保留坦克封闭。
如果出现问题的一个阀门无法打开了。飞行控制有时需要排急于 - 例如，坦克当他们中止发射。随着阀门打开，坦克可以消耗约两小时。如果没有这些，它可以采取液氢几天的汽化自然。
在周二晚上的填补，发射队获得其他非直接的证据表明，该阀门已关闭，迈克说摩西，谁负责的发射前的使命管理团队。这表明，所涉及的问题，而不是传感器本身的阀门。
根据工程师开发的诊断，发现可以在上午12时22分发射东部时间周五公布，第二次尝试可能的约23小时后。气象预报都在拭目以待热带风暴丹尼，看看它是否会导致与天气有关的延误。如果这两个机会擦洗，美国宇航局8月30日才能发射。在此之后，其他的卡纳维拉尔角发射时间表以及俄罗斯和周围的空间站日本货运量将推动发射到10月中旬。

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